USER GUIDE SIM® 3 Audio Analyzer System Software v1.6.
DECLARATION OF CONFORMITY (According to ISO/IEC Guide 22 and EN 45014) Manufacturer's Name Meyer Sound Laboratories Inc. Manufacturer's Address 2832 San Pablo Avenue Berkeley, CA 94702-2204, USA European Contact Declares that the product Product Name SIM-3022, SIM-3088, SIM-3081 Product Options All Conforms to the following specifications Your local Meyer Sound dealer or Meyer Sound Germany, GmbH. Carl Zeiss Strasse 13, 56751 Polch, Germany Telephone: 49.2654.9600.58 Fax: 49.2654.9600.
SYMBOLS USED These symbols indicate important safety or operating features on the chassis: Dangerous voltages: risk of electric shock Important operating instructions Frame or chassis Protective earth ground Pour indiquer les risques résultant de tensions dangereuses Pour indequer important instructions Masse, châssis Terre de protection Zu die gefahren von gefährliche spanning zeigen Zu wichtige betriebsanweisung und unterhaltsanweisung zeigen Rahmen oder chassis Die schutzerde Para indicar vo
IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with dry cloth. 7. Do not block any ventilation openings. Install in accordance with Meyer Sound's installation instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat. 9. Do not defeat the safety purpose of the grounding-type plug.
CONTENTS Introduction to this Manual ....................................................................................................1 CHAPTER 1: SIM 3® Measurement Terminology ..................................................................3 CHAPTER 2: The SIM 3 Hardware ......................................................................................11 2.1. SIM-3022 Audio Analyzer ................................................................................... 11 2.2.
CHAPTER 7: Using SIM 3 ...................................................................................................117 7.1. Starting a Project .............................................................................................. 117 7.2. Adjusting the Settings....................................................................................... 119 7.3. Making Measurements ..................................................................................... 127 7.4.
INTRODUCTION Introduction to this Manual INTRODUCTION TO THIS MANUAL This manual is the primary user guide for setting up and using the SIM 3 audio analyzer to perform audio measurements for aligning and optimizing sound systems. It describes all of the features and functionality of the hardware and software, and provides basic guidance in how to use SIM 3 to perform measurements.
INTRODUCTION Introduction to this Manual store, and compare measurements. It starts with naming and saving files, and ends with using modes and procedures to align and optimize a sound system. Chapter 8: SIM 3 Menus is a reference that provides short descriptions and additional shortcuts for each of the menu items within the SIM 3 software.
CHAPTER 1 SIM 3 Measurement Terminology CHAPTER 1: SIM 3 MEASUREMENT TERMINOLOGY A number of different terms are used within SIM 3, either to describe concepts of acoustic measurement or to name specific methods and features in the hardware and software. This section will define these key terms as they relate to SIM 3 and its functions. SOURCE INDEPENDENT MEASUREMENT (SIM): Pioneered by Meyer Sound, SIM is a Meyer Sound trademark for a highly developed analyzer for source independent measurement.
CHAPTER 1 SIM 3 Measurement Terminology MEASUREMENT: A method of capturing, calculating, transforming, and displaying a sample of data, resulting in a useful/interpretable presentation of that data. Examples of SIM 3 measurements are Band Spectrum, Line Spectrum, Delay Finder, and Frequency Response. VIEW: A way of looking at a captured sample of data (or an ongoing sample of data) that does not change what data is captured and recorded or how it is captured and recorded.
CHAPTER 1 SIM 3 Measurement Terminology LINE SPECTRUM: The Line Spectrum measurement displays the amplitude of the measured signal at all frequencies between 8 Hz and 20 kHz. The signal is measured at a resolution of 48 points per octave, and its rms value is shown at each point. It is the measurement used to view the harmonic distortion of a device, using a sine wave as the signal.
CHAPTER 1 SIM 3 Measurement Terminology More than one pulse may be seen in an impulse response display trace, indicating either a signal from another loudspeaker arriving at a different time than the main signal, or reflections on architectural surfaces from the measured loudspeaker’s signal. FREQUENCY RESPONSE: Frequency Response is the frequency domain transfer function. The frequency response of a system is a measure of its reproductive accuracy in both relative amplitude and phase over frequency.
CHAPTER 1 SIM 3 Measurement Terminology Electrically, this would be positive and negative voltages, and acoustically this would be the compression and rarefaction of air molecules excited by the motion of some generating force, such as a voice, instrument, or loudspeaker. The SIM 3 “phase response over frequency” screen shows relative phase over frequency. The vertical axis runs in a 360-degree cycle (0 degrees at center).
CHAPTER 1 SIM 3 Measurement Terminology have phase (time) differences that lead to an uneven set of additions and cancellations over the frequency range — comb filtering — that is detrimental to the audio quality of the signal. Alignment is a multifaceted process which includes the setting of relative levels, speaker positioning, acoustic treatment, delay setting and equalization. PROPAGATION DELAY: Propagation delay is the transit time from origin to destination of a transmitted signal.
CHAPTER 1 SIM 3 Measurement Terminology The data from a microphone measurement is specific to the particular location within the room where the microphone is positioned; measurements at multiple locations are typically required in order to achieve the desired results of even coverage and balanced frequency response throughout a venue from a multi-loudspeaker sound reinforcement system. Highly accurate, omni-directional measurement microphones are usually used.
CHAPTER 1 SIM 3 Measurement Terminology 10
CHAPTER 2 The SIM 3 Hardware CHAPTER 2: THE SIM 3 HARDWARE The SIM 3 audio analyzer system is truly multi-channel, so that time can be spent measuring instead of setting up or patching. System hardware components include: ■ SIM-3022 audio analyzer ■ SIM-3088 16-channel line switcher ■ SIM-3081 8-channel microphone switcher ■ High-quality measurement microphone ■ SIM-3004 remote power supply 2.1.
CHAPTER 2 The SIM 3 Hardware 2.1.1.1. Power/Standby Switch The power/standby switch, located in the lower right corner of the SIM-3022 analyzer, is used to power on the unit. The recommended way to shut down the analyzer is via File > Shutdown from the menu. If necessary, the power switch may be used to turn off the analyzer; the switch must be held for five seconds in order for the unit to properly shut down.
CHAPTER 2 The SIM 3 Hardware CAUTION: The SIM-3022 analyzer is a dedicated hardware system; do not connect devices other than a mouse and keyboard, respectively, to these ports. Doing otherwise may damage the hardware. CAUTION: You can use the front and rear mouse ports simultaneously – for instance, if you have a keyboard with a touchpad in addition to a regular mouse. Using both the front and rear keyboard inputs, however, will cause a hardware conflict; use only one keyboard input at any one time. 2.1.
CHAPTER 2 The SIM 3 Hardware Observe the following status LEDs when using the generator: ■ ON/OFF LED – Located above the front panel XLR connector, this LED displays the status of the generator; it will light if the generator is on. (green) ■ Bus Select LED – The bus select indicator, this LED is lit when the generator is assigned to one of the buses of the live branch.
CHAPTER 2 The SIM 3 Hardware ■ Sine Wave — This test signal is used for gain structure testing and distortion analysis in Line Spectrum measurements (at cursor position). The frequency and amplitude can be fixed using the generator Sine Wave dialog (accessible from the Generator menu) after setting the “level” knob to “CAL”. The output level and frequency can also be adjusted using the “level” and “frequency” knobs on the front panel.
CHAPTER 2 The SIM 3 Hardware There are four meter LEDs above each XLR input, representing the following status information from left to right: ■ Green: -48 dBFS ■ Green: -24 dBFS ■ Yellow: -6 dBFS ■ Red: Overload NOTE: The level shown on the meter is relative to the full scale and depends on the sensitivity that is selected in the software input meter settings dialog.
CHAPTER 2 The SIM 3 Hardware 2.1.1.6. Mic Inputs 1 and 2 ��������� �������������� ��������� �������������� ���������� ������������� ������������ ���������� ���������� ����� 48v MIC 2 48v ��������������� PUSH ����� ��������� 1 PUSH ����� ��������� As dedicated microphone inputs, these front-panel XLR female inputs can accept microphone-level signals. NOTE: The 48 V phantom power for these inputs can only be activated via Settings > Front Panel or Branch > Edit Branches > Front Panel.
CHAPTER 2 The SIM 3 Hardware In order to make transfer function measurements between any of these points, the reference and measurement points need to be defined by constructing branches from the Branch > Edit Branches option in SIM 3 software. Selecting the Branches tab and specifying “FP” in the address box will allow you to select these front-panel inputs.
CHAPTER 2 The SIM 3 Hardware 2.1.1.7. Headphone Output The headphone output is used for monitoring any of the sources connected to the front panel or switchers. Selection is controlled via the silver select buttons (Figure 2.1), while level is controlled with the “level” knob. ��������� ����������� ��������� �������������� Figure 2.1. SIM-3022 headphone buttons Any of the front-panel inputs can be monitored by pressing the headphone select button for the desired channel.
CHAPTER 2 The SIM 3 Hardware level ® SIM-3022 Audio Analyzer level CAL SOURCE 1 PUSH LINE 48v 2 PUSH 1 MIC 2 PUSH 48v CDR PUSH CHANNEL 2 CHANNEL 1 frequency Device Under Test Figure 2.2.
CHAPTER 2 The SIM 3 Hardware level ® SIM-3022 Audio Analyzer level CAL SOURCE 48v PUSH PUSH CHANNEL 1 2 CHANNEL 2 LINE CHANNEL 1 1 PUSH 1 MIC 2 48v CDR PUSH CHANNEL 1 frequency Device Under Test Figure 2.3.
CHAPTER 2 The SIM 3 Hardware 2.1.2. Rear Panel �������� ������������ ����� ������ ����� ������������� ������������� ����������� ��������� ���������� SOURCE Connect to 3088 only Connect to 3081 only Made in USA with domestic and foreign parts Se rial No. ������������ ��������� ���� ���� �������� ������������� ������������� �������� ������������ ������������� 2.1.2.1.
CHAPTER 2 The SIM 3 Hardware All amplifier modules and directly associated audio equipment (mixing consoles, processors, etc.) must be connected to the AC power distribution in a proper manner, preserving AC line polarity and connecting earth ground such that all grounding points are connected to a single node or common point using the same cable gauge as the neutral and line(s) cable(s).
����� ������������� CHAPTER 2 ������������� ����� The SIM ����������� 3 Hardware ������ ��������� ���������� 2.1.2.5. Bus Connectors SOURCE Connect to 3088 only ������������ ��������� ���� ���� �������� ������������� ������������� Connect to 3081 only �������� ������������ ������������� The rear panel of the SIM-3022 analyzer includes two multi-pin bus connectors.
Connect to 3022 or 3088 only Connect to 3022 or 3088 only Se rial No. with domestic and foreign parts Made in USA console / processor Return from SIM 3022 1-8 Send to SIM 3022 1-8 console / processor console / processor Return from SIM 3022 1-8 console / processor Send to SIM 3022 1-8 processor Send to SIM 3022 9-16 processor Send to SIM 3022 9-16 SIM-3088 Line Switchers (Rear Panels) Se rial No. with domestic and foreign parts Made in USA Se rial No.
CHAPTER 2 The SIM 3 Hardware 2.2. SIM-3088 LINE SWITCHER When larger systems or more sophisticated needs are involved, the SIM-3088 line switcher is the perfect solution for measuring multiple points in the signal chain, as individual branches. The single rack, multiple-configuration 16-channel line-level switcher allows immediate access to the key measurement points in a multi-channel sound system..
CHAPTER 2 The SIM 3 Hardware NOTE: Addressing for line switchers and microphone switchers are handled separately, hence the address for any line switcher does not need to be different from the address of any microphone switcher. 2.2.1.2. Mute Safe Switch This recessed switch controls the speaker mute capability of the SIM-3088 line switcher.
CHAPTER 2 The SIM 3 Hardware 2.2.2. LED Indicators 2.2.2.1. Console/Processor These indicators show the configuration made in the software (from the Branches dialog, select the Switchers tab) of the line switcher for the first eight channels in groups of four. When the console LED (left) is lit, those four channels become system input channels (From Console). When the processor LED (right) is lit, those four channels become processor output channels (From Processor). 2.2.2.2.
CHAPTER 2 The SIM 3 Hardware NOTE: The signal level of the selected channels can be monitored in the SIM3022 analyzer. The front-panel Line 1 meter will show the level of the signal on the “console” bus of the Live Branch. Likewise, the front-panel Line 2 meter will show the level of the signal on the “processor” bus of the Live Branch. 2.2.2.4.
CHAPTER 2 The SIM 3 Hardware As shown in Figure 2.2, this configuration will light the console LED for channels 1-4 and the console LED for channels 5-8. The mute/ON LEDs (1-4) and mute/ON LEDs (5-8) will be off. ��������������� ����������������� ������������� ������� ������� ����������������� ������������� CONSOLE / PROCESSOR CONSOLE / PROCESSOR Bus Select 1 2 Bus Select 3 4 5 Bus Select 6 7 Mute 8 9 10 11 12 13 Mute ������� �������� 14 15 16 Mute ������� �������� Figure 2.6.
CHAPTER 2 The SIM 3 Hardware The mute/ON LEDs for channels 9-16 will be lit either green or red, since channels 9-16 are always used as processor and are either passing signal (green) or muted (red). 2.2.3.3. 0+16 Configuration This configuration uses all 16 channels as processor outputs (To Speaker) — useful if you are using another switcher for system line inputs or Line Inputs 1 and 2 on the front panel of the SIM-3022 analyzer.
CHAPTER 2 The SIM 3 Hardware 2.2.4. Rear Panel ��� ���������� Send to SIM 3022 1-8 Return from SIM 3022 1-8 Send to SIM 3022 9-16 Return from SIM 3022 9-16 Made in USA with domestic and foreign parts Se rial No. Connect to 3022 or 3088 only console / processor console / processor processor processor ������������� �������������� ������������� ����������� �������������� ����������� 2.2.4.1. Bus Connectors The rear panel of the SIM-3088 line switcher includes two multi-pin bus connectors.
CHAPTER 2 The SIM 3 Hardware SOURCE SIM-3022 Audio Analyzer Connect to 3088 only Connect to 3081 only Made in USA with domestic and foreign pa rts Se rial N o. Send to SIM 3022 1-8 Return from SIM 3022 1-8 Send to SIM 3022 9-16 Return from SIM 3022 9-16 Made in USA with domestic and foreign pa rts Se rial N o.
CHAPTER 2 The SIM 3 Hardware 2.2.4.3. 8+8 Configuration Audio Connections When the switcher is configured in an 8+8 configuration, Send channels 1–8 (red) take the signal from a source (typically a mixing console) into the SIM 3 system as a measurement point. Return channels 1–8 (black) return the signal to the next element (typically a signal processor). Send channels 9–16 (blue) take the signal from the output of the processor into the SIM 3 system, as another measurement point.
CHAPTER 2 The SIM 3 Hardware 2.2.4.4. 4+12 Configuration Audio Connections When the switcher is configured in a 4+12 configuration, Send channels 1–4 (red) and 9–16 (blue) are patched in the same manner as the 8+8 above(Section 2.2.4.3). Sends and returns 5–8 are patched as Processor channels, in the same manner as sends and returns 9–16.
CHAPTER 2 The SIM 3 Hardware 2.2.4.5. 0+16 Configuration Audio Connections When the switcher is configured in a 0+16 configuration, signal from a source (typically a mixing console) must be provided via another SIM-3088 line switcher or the SIM 3 front panel in order to create a source measurement point(s). All 16 channels are patched as Processor outputs in the same manner as channels 9–16 have been in all previous scenarios.
CHAPTER 2 The SIM 3 Hardware 2.3. SIM-3081 MICROPHONE SWITCHER The SIM-3081 single, half-rack, 8-input mic-level switcher enables measurements in several places (zones) by using multiple microphones in the room being analyzed. In addition, its half-rack size provides complete flexibility for locating the switcher where you need it, whether at front of house, a remote equipment room, or other location. NOTE: The mic switcher can be installed inside the Mic Boot.
CHAPTER 2 The SIM 3 Hardware The address can be changed using a small screwdriver or a pen. +48v Bus Pwr Data ���������������������� 0 ���������������������� ��������������������� Addr 2.3.1.2. Microphone Inputs The front panel has eight dedicated, 3-pin female XLR microphone inputs. TIP: The 48 V phantom power for all eight inputs is always active when the switcher is powered and the 48 V LED indicator is on.
CHAPTER 2 The SIM 3 Hardware 2.3.1.4. Status In addition, the front panel of the mic switcher includes three status indicators: ■ 48 V — Indicates the presence of phantom power (red) ■ Bus Pwr – Indicates that power is being received from the SIM-3022 audio analyzer (green) ■ Data – Indicates that status, commands and other non-audio data are being transferred to or from SIM 3 software (green) CAUTION: If the mic switcher’s 48 V LED is not lit, there is no phantom power.
CHAPTER 2 The SIM 3 Hardware Microphone switchers are remotely powered from the SIM-3022 analyzer. The total number of switchers (line and microphone) that can be powered by the SIM 3 analyzer is limited to three; if more switchers are needed, the SIM-3004 remote power supply is available from Meyer Sound. CAUTION: Do not connect more than three switchers to a SIM 3 machine to avoid damaging the power supply. If more switchers are needed always use Meyer Sound’s remote power supply.
CHAPTER 2 The SIM 3 Hardware 2.3.3. SIM-3081 Microphone Switcher Audio Connections The SIM-3081 microphone switcher provides 8 mic-level inputs for measurement mics placed at various locations within the room. They are on XLR-3F connectors on the front panel, each with 48-V phantom power. 2.4.
CHAPTER 2 The SIM 3 Hardware 2.4.1. Front Panel The front panel features the following switches and LEDs: ± 15 V Power (1) (2) SIM 3 Remote Power Supp (1) Push-type power switch (2) Power on LED, +/-15 V ± 15 V Power 2.4.2. Rear Panel (1) (2) 3 Remote (1) (3) Supplyto (2) rear panel. Supply AC SIM All connections to the power supply are on the power andPower connect WARNING: V-Range the SIM analyzer and switchers using SIM bus connector cables.
CHAPTER 2 The SIM 3 Hardware 2.4.3. Power and Signal Flow through the Power Supply Connectors Audio signals from switchers and control signals from the SIM 3 analyzer will flow through both of the rear-panel connectors on the SIM-3004 remote power supply. DC power is supplied from the right-hand connector, marked “Connect to 3088 or 3081 ONLY”, and will power units “downstream” from it. Both incoming and outgoing DC current is blocked from the left-hand connector, marked “Connect to 3022 Analyzer ONLY”.
CHAPTER 2 The SIM 3 Hardware 2.4.4. Connecting the SIM-3004 Remote Power Supply to Line Switchers Typically, SIM-3088 line-level switchers are powered by a direct connection to the SIM-3022 analyzer or via the loop-through connector of an already connected switcher. To add more line switchers to a system, attach a SIM bus cable to the loop-through of the last unit in the chain, and then to the left-hand connector of the SIM-3004 — located within the grey box marked “Connect to 3022 Analyzer ONLY.
CHAPTER 2 The SIM 3 Hardware SOURCE SIM-3022 Audio Analyzer Connect to 3088 only Connect to 3081 only Made in USA with domestic and foreign pa rts Se rial N o. Send to SIM 3022 1-8 Return from SIM 3022 1-8 Send to SIM 3022 9-16 Return from SIM 3022 9-16 Made in USA with domestic and foreign pa rts Se rial N o.
CHAPTER 2 The SIM 3 Hardware 2.4.5. Connecting the SIM-3004 Remote Power Supply to Mic Switchers To connect additional SIM-3081 mic switchers to a system, connect a SIM bus cable to the loop-through connector of a switcher that is connected to the analyzer (either directly or via the loop-through connector of another mic switcher). Connect the cable to the lefthand connector of the SIM-3004 remote power supply, located within the gray box marked “Connect to 3022 Analyzer ONLY”.
CHAPTER 2 The SIM 3 Hardware SOURCE SIM-3022 Audio Analyzer Connect to 3088 only Connect to 3081 only Made in USA with domestic and foreign pa rts Se rial N o. Send to SIM 3022 1-8 Return from SIM 3022 1-8 Send to SIM 3022 9-16 Return from SIM 3022 9-16 Made in USA with domestic and foreign pa rts Se rial N o.
CHAPTER 2 The SIM 3 Hardware 2.4.6. Using Multiple SIM-3004 Remote Power Supplies in a System Larger SIM 3 measurement systems may require the use of multiple SIM-3004 units to power the various switchers. Remote power supplies are used to supplement the power that is supplied by the analyzer itself. The remote power supply will provide DC current to switchers connected to the right-hand connector, and will pass audio signals to the analyzer and control signals from the analyzer.
CHAPTER 2 The SIM 3 Hardware SOURCE SIM-3022 Audio Analyzer Connect to 3088 only Connect to 3081 only Made in USA with domestic and foreign pa rts Se rial N o. Send to SIM 3022 1-8 Return from SIM 3022 1-8 Send to SIM 3022 9-16 Return from SIM 3022 9-16 Made in USA with domestic and foreign pa rts Se rial N o.
CHAPTER 2 The SIM 3 Hardware 50
CHAPTER 3 SIM 3 Configurations and Branches CHAPTER 3: SIM 3 CONFIGURATIONS AND BRANCHES 3.1. SETTING UP BRANCHES 3.1.1. Overview Within SIM 3, the setup and management of the signal paths from console through processor to the loudspeaker and room are organized into Branches. A branch consists of three measurement points: ■ Console: The Console is the audio input into the sound reinforcement system (source), typically the output of a mixing console or other source.
CHAPTER 3 SIM 3 Configurations and Branches Excitation Correction Object of measurement Input Signal Processor Loudspeaker In Room with Measurement Microphone Line Input 2 Line Input 1 Processor Mic Speaker + Room Result Figure 3.1. The three measurement points in SIM 3 3.1.3. From Physical Setup to SIM Setup When a SIM 3 system is being set up to perform measurements, all of the cabling connections to create software branches must pass through the SIM machine.
CHAPTER 3 SIM 3 Configurations and Branches 3.1.4. Selecting and Naming Switchers: Console, Processor, Mic Once the physical setup of the measurement points with the sound system is completed, the next steps are to name these points within SIM 3 and then select combinations of the points to define the branches. During setup, the system engineer will have noted which input and output connections to the switchers are associated with which points in the system to aid in the naming.
CHAPTER 3 SIM 3 Configurations and Branches NOTE: Make sure you have set the desired address on the address switch of the SIM-3088 Line Switcher(s) in use. For each SIM-3088 line switcher, determine their configuration (number of console channels versus processor channels): 8 + 8, 4 + 12, or 0 + 16. This selection is done using the radio buttons on the upper right side of each tab; the default is 8 + 8. Once the selection is made, the number of Console and Processor fields will be arranged accordingly.
CHAPTER 3 SIM 3 Configurations and Branches In addition, the Processor channels have a Location and Model field. It is suggested these fields are filled to provide a complete and accurate description of the system and easy identification of the elements being measured. Figure 3.3 Labeling switcher channels for Console and Processor 3.1.4.3. Setting Up Microphone Channels In the lower portion of the Switcher settings page, the measurement microphone portion of the branch can also be named.
CHAPTER 3 SIM 3 Configurations and Branches NOTE: Please make sure the sensitivity in mV/Pa for each microphone is entered on the corresponding channel to assure correct scaling on the measurements. In addition, the Microphone channels have a Model, Location and Function field. Fill in these fields to provide a complete and accurate description of the microphone location and what part of the system is being measured.
CHAPTER 3 SIM 3 Configurations and Branches Go to Settings > Front Panel to open the front panel dialog. The Line section is divided into two columns: ■ Name: Enter a descriptive name for the line input. The defaults names for both inputs are Line In 1 and Line In 2, respectively. This name will appear under the Branch tab for the channel. ■ Comment: Enter any desired comments for the line input. The default is a blank field.
CHAPTER 3 SIM 3 Configurations and Branches enter the new text. A faster triple-click (or a slower double click) will highlight the existing text, and then the new name can be entered. Figure 3.6. Naming branches in the Branch tab. NOTE: A branch name may be any combination of letters and numbers – including spaces and punctuation. Make sure useful names are used to clearly identify each Branch. 3.1.6.
CHAPTER 3 SIM 3 Configurations and Branches 3.1.6.1. Address The Address (Ad) of a branch tells SIM 3 which device is used to find the input signals within the entire measurement system. The Address (Ad) dropdown box is located to the immediate left of the each of the three Channel (Ch) dropdowns. Click on it to select the address of the following sources: ■ Front Panel (FP) – Selecting Front Panel (FP) as address will assign connections directly from the SIM-3022 analyzer.
CHAPTER 3 SIM 3 Configurations and Branches Figure 3.7. Selecting switcher addresses in the Branches tab The contents of the Channel (Ch) dropdown box (covered in the next section) will change depending on the address (Ad) selection, and on whether you are using the front panel (FP) or one of the numeric addresses (0 - 9). In addition, the dropdown box will change the options for Console and Processor depending on the configuration of the Line Switcher at that address.
CHAPTER 3 SIM 3 Configurations and Branches Figure 3.8. Front-Panel channels dropdown menu for Console in Branches tab. NOTE: See Section 6.10, Generator, in Chapter 6 of this manual for more details on how to use SIM 3’s built-in noise, sine wave, and pulse generators. ■ Processor Channels: Two (2) line-level inputs, Line 1 and Line 2 — If Generator is selected as Console the software only allows you to select Line 2 in Processor.
CHAPTER 3 SIM 3 Configurations and Branches ■ Microphone Channels: Two (2) microphone inputs, Mic 1 and Mic 2. Figure 3.10. Front-Panel channels dropdown menu for Microphone in Branches tab TIP: When the 48 V field is not checked in the software, these microphone inputs may be used as additional front-panel line inputs using the appropriate gain settings.
CHAPTER 3 SIM 3 Configurations and Branches Mic Switcher Channels If a numeric address (0-9) is selected in the Address (Ad) dropdown box for Microphone, the channels available from the Mic Switchers dropdown will be eight mic-level channels numbered 1-8. Figure 3.11. Microphone switcher channel dropdown menu in Branches tab 3.1.6.3. Delay Time During a measurement, when using Autoset Delay in Delay Finder, the actual delay times will be automatically placed in the fields of the Branch being selected.
CHAPTER 3 SIM 3 Configurations and Branches NOTE: When defining a new Branch, make sure you use valid measurement points and that a physical connection exists into the sound system with the correct address (Ad) and channel (Ch) selected. Figure 3.12. New and Delete buttons in Branches tab 3.1.8. Creating Branches using Multiple Switchers Each of the line and mic switchers have bus addresses that can be selected in the Branches menu to create branches.
CHAPTER 3 SIM 3 Configurations and Branches 3.1.9. Live Branch The SIM 3 analyzer can only take measurements from one Branch at a time. This Branch is known as the Live Branch. Data is being continually collected and displayed for the measurement points defined in the Branch selected as the Live Branch.
CHAPTER 3 SIM 3 Configurations and Branches 3.1.10. Changing the Live Branch The Live Branch can be selected for measurement in a variety of ways. From the Branch menu, a list of all available branches is shown. Click on the desired one, and it will be put into the Live branch and become the current measurement. The Previous Branch and Next Branch selections in the menu can also be used to step through the branches in numerical order.
CHAPTER 3 SIM 3 Configurations and Branches 3.1.11. Saving/Storing Branch Measurements Clicking the Store button in the Live Branch row will open up the Store DataGroup dialog and allow the current measurement to be named and stored. Any additional notes may be placed in the Notes field. Once the measurement is stored, it may be recalled into memory locations A through D.
CHAPTER 3 SIM 3 Configurations and Branches Figure 3.16. Memory locations in Selector tab, primary and secondary dropdowns Clicking on any of the Mem A through Mem D buttons on the left side of the Selector tab will open the Recall DataGroup dialog. Any stored DataGroups may be opened from this dialog, and will automatically be placed in that memory location of the Selector tab unless another location is chosen via the dialog memory location radio buttons.
CHAPTER 4 Software Updating CHAPTER 4: SOFTWARE UPDATING 4.1. NORMAL SYSTEM BOOTUP The normal bootup of the SIM-3022 analyzer is as follows: 1. Make sure the Install and Recovery CD is not in the SIM 3 analyzer. 2. Turn the analyzer on. After checking the CD-RW drive, the analyzer looks to the internal compact flash to boot the software. 3. The SIM 3 software application will automatically load and run. NOTE: The system will attempt to boot from the CD-RW drive first if a CD is present. 4.2.
CHAPTER 4 Software Updating 4.3. NEW VERSION UPDATING PROCEDURE From time to time, updates of the SIM 3 software will be made available, offering new features as well as any necessary bug corrections. Use the following procedure to update the software. 1. With the SIM-3022 analyzer off, and no other CD inserted in the drive, insert the SIM 3 Install and Recovery CD half-way into the CD-RW drive.
CHAPTER 4 Software Updating NOTE: If Option 2 (Reformat Disk) is selected, a confirm-or-abort menu will be displayed to prevent the accidental erasure of user data. 5. When the desired option is highlighted, press the Enter key on the keyboard. The program will begin to load, with an “Installing” note briefly appearing, followed by the message “Uncompressing Files: This may take several minutes… .” 6. After the files are uncompressed, the program installs.
CHAPTER 4 Software Updating 4.4.1. Setup and DataViewer Installation Procedure The Setup and Data Viewer is supplied via download from the Meyer Sound Web site (www. meyersound.com) or on CD for installation on your Windows PC. Future updates or program enhancements to the Setup and Data Viewer will be available from time to time on the web site. 4.4.1.1. System Requirements The following are the minimum system requirements necessary to run the Setup and Data Viewer: ■ Windows 98/NT 4.
CHAPTER 4 Software Updating 4. Select an installation destination by clicking the Browse button (the Desktop, My Document, or C:/ are suggested destinations), then click Unzip to copy the files to their destination. A confirmation dialog appears when copying is complete. 5. Locate the folder “SIM3v(x.x.x)” and open it, and then locate the file “SIM3.exe” within it. Right-click on the file to create a Shortcut, and place it on the Desktop. 6.
CHAPTER 4 Software Updating 4.4.2.1. Starting a New Project To begin a new project, perform the following steps: 1. Choose File > New. A dialog appears asking to clear all data, branch and hardware names, and restore default branches. Click Yes. 2. Choose File > Properties to bring up the Project Properties dialog. 3.
CHAPTER 4 Software Updating 4. Click OK to exit the Project Properties dialog. TIP: It’s a good idea to save your new project immediately after creation. To do so, follow the steps in the “Saving a Project” section later in this chapter. 4.4.2.2. Opening a Project To open a new project, perform the following steps: 1. Choose File > Open. The Open SIM 3 Project dialog appears. 2. Select a file to open from the list of available files, then click the Open button to load the project.
CHAPTER 4 Software Updating 4.4.2.3. Saving a Project To save a project, perform the following steps: 1. Choose File > Save to bring up the Save dialog. 2. In the Save dialog, select a name for the project and then click the Save button. NOTE: You can also save a project with a different filename by choosing Save As... from the File menu; follow the same steps as above to save the project to a new or different file.
CHAPTER 4 Software Updating 4.4.2.4. Recording Project Files to a CD To use project files that you’ve set up in the Setup and Data Viewer on the SIM 3 audio analyzer, you will first need to “burn” the files to CD-R or CD-RW media. NOTE: For more information on the SIM 3 analyzer’s CD-RW drive — including how to burn CDs — refer to Section 2.1.1.2, CD-RW Drive, and Section 8.1.10, Copy Directory to CDR.
CHAPTER 4 Software Updating 2. Make sure that Open Writable CD Folder Using Windows Explorer is highlighted (it should be by default) and click OK. A blank folder will appear (Figure 4.3). Minimize the folder. Figure 4.3. Windows Explorer will start you out with a clean slate. 3. Open another Windows Explorer window by selecting Programs > Accessories from the Start menu. Locate and select the project files you wish to copy, then right-click and select Copy from the resulting pop-up menu. (Figure 4.4).
CHAPTER 4 Software Updating Figure 4.4. Copy the files in normal Windows fashion. CAUTION: There are two files for any project — each with the same name but with different file extensions: .BIN and .XML. Make sure you select and copy both files. 4. Open the Writable CD folder from the Windows XP task bar. Right-click and select Paste from the resulting pop-up menu.
CHAPTER 4 Software Updating Figure 4.5. Project files are ready to be burned. 5. On the top-left side of the Writable CD folder, click Write these files to CD. The CD Writing Wizard will launch. 6. Type in a descriptive name in the CD Name text box if desired, and then click Next. Windows XP will begin burning the files to your CD-R or CD-RW media.
CHAPTER 4 Software Updating Data remains in memory as long as the Setup and Data Viewer is running. From the Data menu, the primary data functions are: ■ Restart Measurement — Restarts the current measurement. ■ Store Measurement — Stores live data in memory. ■ Recall Measurement — Recalls data from memory to the screen.
CHAPTER 4 Software Updating NOTE: You can also use the tabbed Selector window (located at the lower left side of the SIM 3 interface) to launch the Store Measurement or Recall Measurement dialogs. NOTE: To store a data group, simply click the Store... button — the Store Measurement dialog will appear. To recall a measurement, click one of the four Mem buttons (A, B, C or D). Once you have recalled a data group, the data is displayed on the Names tab, located just to the right of the Selector tab.
CHAPTER 4 Software Updating 4.4.3.3. Exporting the Current Screen To export any SIM 3 screen you’re currently viewing to a third-party application (Microsoft Word or PowerPoint, for example), use File > Export to create a bitmap (.bmp) image of the entire screen. You may also use the Print Screen key (or in some cases press CTRL-C) on your computer’s keyboard to copy the screen contents to the Windows clipboard.
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CHAPTER 5 The Measurements CHAPTER 5: THE MEASUREMENTS — DEFINITIONS AND APPLICATION SIM 3 performs four basic types of measurements: ■ Band Spectrum — rms signal amplitude in 1/3-octave bands. ■ Line Spectrum — rms signal amplitude at 48 points per octave. ■ Delay Finder —time domain information between two measurement points. ■ Frequency Response — differences in amplitude and phase by frequency between two measurement points. Each measurement is described below.
CHAPTER 5 The Measurements point. The user can view each individual trace (Console, Processor, Mic) in the measurement window — or all three simultaneously (All) in three smaller windows. Figure 5.1. Band Spectrum, full-range measurement from Microphone 5.1.3. Console Click the Console button or select View > Console to view the console trace by itself. 5.1.4. Processor Click the Processor button or select View > Processor to view the processor trace by itself. 5.1.5.
CHAPTER 5 The Measurements Figure 5.2. Band Spectrum measurement, All view 5.2. LINE SPECTRUM 5.2.1. Overview Line Spectrum measurements display the single-channel amplitude response of each of the measured input channels as absolute rms amplitude dBV (or dBSPL for the mic channel) versus frequency in Hertz. 5.2.2. Description of the Measurement The Line Spectrum measurement displays the RMS amplitude of the measured signal at all frequencies between 8 Hz and 24 kHz.
CHAPTER 5 The Measurements You can view each individual trace (Console, Processor, Mic) in the measurement window — or all three simultaneously (All) in three smaller windows. 5.2.3. Console Click the Console button or select View > Console to view the console trace by itself. 5.2.4. Processor Click the Processor button or select View > Processor to view the processor trace by itself. 5.2.5.
CHAPTER 5 The Measurements 5.2.6. All To view the console, processor and microphone traces simultaneously in three separate graphs, click the All button or select View > All. Figure 5.4. Line Spectrum measurement, All view 5.3. DELAY FINDER 5.3.1. Overview Delay Finder computes and displays the amplitude response of the measured system in the time domain.
CHAPTER 5 The Measurements 5.3.2. Description of the Measurement SIM 3 utilizes an advanced implementation of the IFT that prevents the “phantom echoes” or “wrap-around” artifacts of conventional sampling algorithms.
CHAPTER 5 The Measurements Figure 5.5. Delay Finder measurement with +/-70 ms time window, Room view 5.3.3. Room Click the Room button or select View > Room to view the room trace by itself. 5.3.4. Processor Click the Processor button or select View > Processor to view the processor trace by itself. 5.3.5. Result Click the Result button or select View > Result to view the result (source signal to measurement mic) trace by itself. 5.3.6.
CHAPTER 5 The Measurements Figure 5.6. Delay Finder, same measurement zoomed to +/-7 ms NOTE: A Delay Finder trace goes upward indicating non-inverting polarity between the input and the output of the signal. A trace going in the negative direction indicates inverting polarity. 5.3.7. Delay Finder Horizontal Axis and Vertical Axis The horizontal axis of any view in Delay Finder represents the distribution of energy over time.
CHAPTER 5 The Measurements Figure 5.8. Delay Finder trace of two sources at approximately 2:1 ratio 5.4. FREQUENCY RESPONSE 5.4.1. Overview Frequency Response measurements display the transfer function between the various measured components of the sound reinforcement signal chain in the frequency domain. The Frequency Response measurement graphically shows the difference in the audio signal between two points in the signal chain.
CHAPTER 5 The Measurements ■ Group View - allows the user to view the Room trace and the Processor trace in the lower window, giving the ability to visually set the EQ filters to the “raw” room response and view the resultant corrected frequency response in the upper Results graph. Figure 5.9. Frequency Response measurement (coherence and frequency response on top, phase on bottom) 5.4.2.
CHAPTER 5 The Measurements Figure 5.10. Same Frequency Response trace, zoomed between 600 Hz and 6 kHz (data “blanked” at approximately 3 kHz) 5.4.3. Room Click the Room button or select View > Room to view the room trace by itself. The corresponding Phase trace is in the lower graph. Room traces are displayed in white. 5.4.4. Processor Click the Processor button or select View > Processor to view the processor trace by itself. The corresponding Phase trace is in the lower graph.
CHAPTER 5 The Measurements TIP: View > Processor Inverted makes equalization cuts appear as boosts and vice versa. See section 7.8.4, Inverse EQ & Overlaying an EQ Trace. 5.4.7. The Coherence Trace The coherence of a signal at a given frequency is the validity of the data that was measured via the samples of the electrical or acoustic signals, shown as a percentage. 100 percent is perfect coherence, and 0 percent is no coherence.
CHAPTER 6 The SIM Measurement Screen CHAPTER 6: THE SIM MEASUREMENT SCREEN 6.1. OVERVIEW All of the SIM 3 measurements and functions are performed via the software within the SIM-3022 analyzer, accessed via a keyboard and mouse, and viewed on the monitor screen. The screen gives access to all of these functions, and is where the measurement data is viewed and compared. This section of the manual describes the features and operations of the SIM 3 screen. 6.2. GRAPH WINDOWS 6.2.1.
CHAPTER 6 The SIM Measurement Screen 6.2.2. Trace Resolution (48 Points/Octave) SIM 3 presents the measured data at a fine resolution of 48 points per octave. As the data is being measured and calculated, the data points are first presented as dots which are averaged and then joined together with lines to form the traces. NOTE: Technically, the 48 dots per octave are arranged in even frequency increments in each octave group, equal to the total frequencies in that octave divided by 48. 6.2.3.
CHAPTER 6 The SIM Measurement Screen signal (low coherence), those sections of the graph are likely to show moving yellow dots rather than a solid trace. With a Live trace, changing the coherence threshold setting (or the number of averages, which automatically changes the threshold) can change which sections of the trace are shown as solid versus as yellow dots or blanked sections of the trace.
CHAPTER 6 The SIM Measurement Screen ������������� Figure 6.3. Trace cursor positioned on Frequency Response trace View > Cursor Peak Track or the P key will activate peak tracking for all measurements except Frequency Response. The cursor will automatically go to the highest amplitude peak of the Live trace, and the fields will reflect those values. To deactivate this function, click in any of the graph windows and the standard cursor will reappear.
CHAPTER 6 The SIM Measurement Screen Figure 6.4. Tabs above the graph windows access the four SIM 3 measurements TIP: The keyboard “hot keys” A, S, D, and F also open the Band Spectrum, Line Spectrum, Delay Finder, and Frequency Response measurements. 6.3.2. Selecting Views within Measurements View each measurement point (in the case of Line and Band Spectrum) or the difference between any of the three measurement points (in Delay Finder and Frequency Response) – separately or in Group or All views.
CHAPTER 6 The SIM Measurement Screen 6.4. SELECTOR TAB The Selector tab provides access to the Live trace and all of the stored traces. From this tab, up to five traces (live plus four stored) can be recalled and viewed, and the user can choose which ones to compare. Figure 6.6. Use the Selector tab to view live and stored traces NOTE: The values in the adjacent Values and Delay tabs relate to the Live and stored traces that are selected via the Selector tab. 6.4.1.
CHAPTER 6 The SIM Measurement Screen Figure 6.7. Hide the Live trace to compare previous measurements by themselves NOTE: If the Live trace area of the Names tab shows gray rather than the standard blue color, it indicates that the system cannot find that switcher and acquire data. Check the assignments in the Branch menu and the connections to and addresses of the switchers. 6.4.2.
CHAPTER 6 The SIM Measurement Screen Figure 6.8. Memory dropdown list selects available stored Branch measurements to view 6.4.5. Secondary Branch Dropdown List A secondary dropdown box on the right allows the user to choose from among any measurements that have been stored for the branch presently selected from the primary dropdown list.
CHAPTER 6 The SIM Measurement Screen 6.4.6. View Measurement Checkboxes The checkbox on the right of each memory row allows the trace to be placed in the graph window and compared with other stored traces and/or the live trace. Figure 6.10. View desired traces by placing checkmarks in the boxes 6.5. NAMES TAB The Names and the Values tabs share the same location in the lower center of the SIM 3 screen, to the right of the Selector tab.
CHAPTER 6 The SIM Measurement Screen ■ Band Spectrum – RMS, Max, and Hold values are shown for Console, Processor, and Microphone. ■ Line Spectrum – RMS, Max, Hold, and THD values are shown for Console, Processor, and Microphone. ■ Delay Finder – Amplitude and Delay time in milliseconds for Processor, Microphone, and Result (console to mic). ■ Frequency Response – Amplitude, Phase, and Coherence for Processor, Room, and Result (console to mic). 6.6.1.
CHAPTER 6 The SIM Measurement Screen 6.7. METERS TAB The Meters tab and the Delays tab share the same location in the lower right corner of the SIM 3 screen. The Meters tab shows the level at each of the three measurement points, and permits adjustment of both the measurement units and the level – optimizing the signal level at each point for the best measurement.
CHAPTER 6 The SIM Measurement Screen CAUTION: When the range in Input Panel Settings is set to 11.3 Vpk or less (+21 dBVpk or less), continuous voltages should not exceed 28 Vrms (+29 dBV sine) to prevent damage to the SIM analyzer inputs. CAUTION: If you intend to measure high-level signals using the front-panel inputs of the SIM-3022 analyzer, use caution to avoid damage. First set the range to 35.
CHAPTER 6 The SIM Measurement Screen 6.8. DELAYS TAB The Delays tab shows the SIM 3 internal delay settings for each of the measurement points in the Live trace and any recalled traces, which are typically set with AutoSet Delay during the Delay Finder measurement. The values are in milliseconds to two decimal places, and are given for Processor, Room, and Result (the sum of the two). Read along the particular row to see the values for that measurement. Figure 6.14.
CHAPTER 6 The SIM Measurement Screen Figure 6.15. View active and muted loudspeakers for the current Live measurement When a speaker button is on, it appears recessed with a small green dot on the left. When muted, the dot turns red. Muting triggers a relay within the switcher and prevents audio from flowing to that amplifier/loudspeaker. The Speakers tab works in conjunction with the Modes menu, showing which speakers have been selected for Single System, Lobe Study, and Combined Systems measurements.
CHAPTER 6 The SIM Measurement Screen 6.10. GENERATOR BUTTONS The SIM-3022 analyzer features a laboratory-grade generator, providing pink noise, sine wave, and pulse signals. Select the desired signal from the Generator menu or the buttons in the upper right corner of the SIM 3 screen. The level and frequency (for sine waves) can be changed via the software or with the front panel rotary knobs.
CHAPTER 6 The SIM Measurement Screen 6.10.3. Pulse Selecting Generator > Pulse or clicking the Pls button generates a pink filtered pulse at an average rate of 1.1 Hz. The interval can be controlled with the Frequency knob on the front panel. 6.10.4. Generator Off (F1) Selecting Generator > Off, pressing the F1 key, or clicking the Off button (located at the upper right side of the SIM 3 interface) turns off the generator. NOTE: The Generator’s output is capable of a maximum voltage swing of +27.
CHAPTER 6 The SIM Measurement Screen 6.12. CALIBRATE MICROPHONE In the Band Spectrum and Line Spectrum measurements, a button labeled Calibrate Microphone is located on the lower left side of the graph window. Clicking on the button brings up a dialog saying the following: “Set the sensitivity of Mic [the current mic for that branch] such that –xx.xx dBV corresponds to XX.XX dBSPL.” Figure 6.18. Use the Calibrate Microphone button to initiate the calibration process NOTE: See Section 7.13.
CHAPTER 6 The SIM Measurement Screen Figure 6.19. Frequency response trace with a 3 dB per division resolution NOTE: The resolution will change simultaneously in all three of the small measurement windows in the All view. TIP: The fewer units per division, the higher the resolution of the trace. Delay Finder provides vertical scale increments (multipliers) of 0.1X, 0.3X, 1.0X, 3.0X, and 10.0X. 6.14.
CHAPTER 6 The SIM Measurement Screen Figure 6.20. Use Horizontal Zoom buttons to view sections of the trace TIP: When using the horizontal zoom buttons, the [+] button enters the Zoom mode and the arrow keys toggle through the frequency ranges. The [-] button zooms out to full spectrum. Delay Finder provides a horizontal scale with a 10:1 zoom centered on the 0 ms point.
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CHAPTER 7 Using SIM 3 CHAPTER 7: USING SIM 3 7.1. STARTING A PROJECT SIM 3 works with Project files to keep individual projects separated and organized. Project files may be named and saved for each SIM session, or an existing project file may be opened and new data saved to it. TIP: In a complex or multi-room installation, separate Project files can be made for each system that is measured and optimized. 7.1.1. Setting Up the File Name and Notes Select File > New or Control + N to begin.
CHAPTER 7 Using SIM 3 To give the project a different name than was entered into the Project field, select File > Save As, type in the new name, and save. This will overwrite the original Project name. 7.1.2. Opening an Existing Project Select File > Open or Control + O to search for and open an existing Project. Highlight the desired file in the dialog box and click Open. NOTE: SIM 3 files are in the XML format; a second companion file with the data is in a BIN file.
CHAPTER 7 Using SIM 3 7.1.5. Closing a SIM 3 Session File > Shutdown is the recommended way to close and turn off SIM 3. A dialog opens that asks the user to save the current file, if desired. It will then close the software and turn off the SIM-3022 hardware and connected switchers. NOTE: Shutdown can be averted by clicking on the Cancel button in the dialog. 7.2. ADJUSTING THE SETTINGS 7.2.1.
CHAPTER 7 Using SIM 3 7.2.1.1. Frequency Response Amp Threshold A Frequency Response measurement consists only of data at frequencies whose reference channel amplitude exceeds the Amplitude Threshold. If no frequencies exceed the threshold, the measurement pauses and the status bar becomes yellow indicating Data < Threshold. NOTE: If some but not all frequencies are below the Amplitude Threshold, the yellow dot trace on the display will be blanked for those frequencies only.
CHAPTER 7 Using SIM 3 NOTE: The Amplitude Threshold setting does not directly affect a Line Spectrum measurement. However, its setting is very important for Frequency Response measurements, since a signal must exceed its amplitude threshold in order to be included in Frequency Response averaging. Figure 7.2. Line Spectrum measurement, showing Amplitude Threshold line NOTE: Amplitude threshold is not applied to the mic channel in any measurement.
CHAPTER 7 Using SIM 3 Figure 7.3. Delay Finder Settings dialog, including Amp Threshold levels 7.2.2. Coherence (Coh) Threshold The coherence threshold is the level at which the analyzer accepts that the correlation of the data at the two measurement points is sufficient to present that data as a trace within the viewer at a particular frequency or subset of frequencies. Coherence is shown as a percentage, and the higher this percentage is, the more likely the measurement at that frequency is accurate. 7.
CHAPTER 7 Using SIM 3 CAUTION: The data from the two measurement points used for the transfer function must be synchronized in time in order for the response to be valid. Use the Delay Finder measurement and either Autoset Delay (F3) or a manually entered delay time in order to exactly synchronize the first (“source”) signal to the second signal. Very low and/or “stair-stepped” coherence traces in the higher frequencies are a visual indication that the data is not synchronized. Figure 7.4.
CHAPTER 7 Using SIM 3 7.2.2.3 Adjusting the Coherence Trace The Coherence trace can be adjusted via the [+] and [–] buttons on the right side of the Frequency Response window to three views: the entire window, the top half of the window, or the top third of the window. The scale, showing values of 0, 50, and 100 percent, is also presented on the right side of the window. 7.2.3.
CHAPTER 7 Using SIM 3 Figure 7.5. Smoothing dropdown list in the Frequency Response measurement NOTE: In the Values table, the amplitude Cursor values do not track with the View > Trace Offset or with the Offset settings. The Cursor retains the actual value. Therefore when the Trace Offset function is used, the Cursor values will appear to differ from the vertical axis values by the amount of offset applied. 7.2.4.
CHAPTER 7 Using SIM 3 7.2.5. Average Time The default Average Time (AvgTime) setting for Frequency Response measurements in SIM 3 is Constant Variance. With this method, the analyzer uses the same number of averages at all frequencies to display the traces. The other setting is Constant Time, which places the trace on the screen based on the last 16 updates, in a first in / first out manner.
CHAPTER 7 Using SIM 3 7.2.7. Autoset Delay (F3) Autoset Delay is used in the Delay Finder measurement to synchronize the three measurement points (Console, Processor, and Mic) in time. NOTE: The center of the Delay Finder graph view will read the current internal delay time (the default when beginning a branch measurement is 0 ms). Once the cursor has stabilized on a peak, select Settings > Autoset Delay, press the F3 key, or click the Autoset Delay button located at the bottom of the Delay Finder tab.
CHAPTER 7 Using SIM 3 Measurements can be started in any of the views, but it is best to work in a particular order. ■ Band Spectrum / Line Spectrum: Begin with the spectrum — at least for the first measurements — to determine the frequency content and amplitude of the audio signal. TIP: These measurements are also useful for reviewing the performance characteristics of the console and the other system electronics, and verifying their functions.
CHAPTER 7 Using SIM 3 TIP: With the trace stable, it is easier to compare and match stored traces with the Live one, and use the Trace Offset settings to lay those traces on top of each other. ■ Restart (R) — “flushes out” the existing data for the Live trace, and starts the process of data acquisition again.
CHAPTER 7 Using SIM 3 Figure 7.10. Group view in Frequency Response, using 8 averages TIP: With measurements that are likely to be steady-state, such as of an equalizer, console, or other electronic device, a lower number of averages is often sufficient. As fast as SIM 3 is, using a higher number of averages does not take a significant amount of time, and the default is 8 averages. 7.3.5.
CHAPTER 7 Using SIM 3 2. Room: Shows the delay introduced by the distance of the measurement microphone from the loudspeaker(s) being measured. Click Autoset Delay to appropriately set the internal delay for that measurement. NOTE: The highest peak in the Room trace will typically be the loudspeaker being measured; smaller and later peaks are usually reflections or other loudspeakers. 3. Check in the Result and Room+Processor views to confirm that the settings are done.
CHAPTER 7 Using SIM 3 Figure 7.12.
CHAPTER 7 Using SIM 3 After setting delays, move to the Frequency Response measurement by clicking its tab, pressing the F hot key, or using Tabs > Frequency Response. TIP: If the frequency response is not showing high frequencies, check the coherence and phase. If the coherence trace is very low or showing “shelving” and the phase trace “wraps around” continually, it is possible the internal delay has not been set to perform an accurate measurement.
CHAPTER 7 Using SIM 3 NOTE: With a stored measurement, all of the same data is used for each view; with a Live trace, new information is continually being added. Excitation Correction Object of measurement Input Signal Processor Loudspeaker In Room with Measurement Microphone Line Input 1 Line Input 2 Processor Mic Speaker + Room Result Figure 7.13. The three measurement points in SIM 3 Figure 7.14.
CHAPTER 7 Using SIM 3 7.3.7 Cursor Peak Track View > Cursor Peak Track causes the cursor to automatically be displayed at the location representing the peak level in all measurements. It allows the user to easily pinpoint the frequency with the highest amplitude. NOTE: If you click in any view window the cursor automatically snaps to the coordinates where you clicked, turning Cursor Peak Track off. To re-enable Cursor Peak Track, press the P key or select it again from the View menu. 7.3.8.
CHAPTER 7 Using SIM 3 7.4. THE STORE / RECALL DATA WINDOW (DATAGROUPS) 7.4.1. Overview of DataGroups Via the Data menu or hot keys and buttons, SIM 3 allows you to save and recall a complete set of data — called a DataGroup — individually by measurement. Store and recall data specifically for a Band Spectrum, Line Spectrum, Delay Finder and Frequency Response measurement, then recall that DataGroup to its proper measurement at any time.
CHAPTER 7 Using SIM 3 7.4.2. Storing Measurements To store a measurement, press the Store button in the Selector tab or click Data > Store DataGroup. The Store DataGroup dialog appears. Alternately, press F5 for QuickStore, discussed below. The following data fields will be stored as one DataGroup: ■ # — The branch number assigned by SIM 3. ■ Branch — The branch name. ■ Group — The group number for the data. The group number is the unique numeric identifier for one row of data.
CHAPTER 7 Using SIM 3 Figure 7.16. The Store DataGroup dialog NOTE: You can use the tabbed Selector window (located at the lower left side of the SIM 3 interface) to launch the Store DataGroup or Recall DataGroup dialogs.
CHAPTER 7 Using SIM 3 7.4.3. QuickStore (F5) To aid in storing measurements on the fly, Data > QuickStore stores the current measurement data with a default name, and recalls it immediately to the Mem A location. Use the F5 key as a single-key shortcut to activate this function. The resulting data is incremented by number, and is stored as “Group 1, Group 2, Group XX”. With QuickStore, many measurements may be stored for later recall and comparison.
CHAPTER 7 Using SIM 3 Figure 7.17. Make additional notes in the Notepad section of the Store DataGroups dialog NOTE: A previously stored DataGroup, either from a current or a saved session, can have existing notes edited or new notes added. Select Data > Recall DataGroup and click on the name of the desired DataGroup. Edit or add to the information in the Notepad field. The information will be stored with the DataGroup when the window is closed, and saved when the Project is saved.
CHAPTER 7 Using SIM 3 7.4.6. Recalling Measurements To recall any data group via the Data menu, click Recall DataGroup. The Recall dialog appears (Figure 7.18). Figure 7.18. The Recall Measurement dialog To recall a measurement from the dialog, find the desired DataGroup and left-click on its Name field — the farthest left column. The DataGroup is highlighted and its data appears in the various fields in the upper right corner. Any notes related to that DataGroup will appear in the Notes area.
CHAPTER 7 Using SIM 3 Figure 7.19. Memory locations and dropdown lists of stored DataGroups in the Selector tab Clicking on any of the Mem A through Mem D buttons on the left side of the Selector tab will open the Recall DataGroup dialog. Any stored DataGroup may be opened from this dialog, and will automatically be placed in that memory location of the Selector tab unless another location is chosen via the dialog memory location radio buttons.
CHAPTER 7 Using SIM 3 Figure 7.20. Renaming DataGroups in the Recall DataGroup dialog 7.4.8. Sorting Measurements During a SIM 3 session a number of DataGroups are likely to be stored, and even with a good naming convention it might be difficult to find a particular one with simple scrolling. To help find the measurements, the headings at the top of Recall DataGroup act as Sort buttons for their respective columns.
CHAPTER 7 Using SIM 3 NOTE: To store a DataGroup, simply click the Store... button — the Store DataGroup dialog will appear. To recall a DataGroup measurement, click one of the four Mem buttons (A, B, C or D) under the Selector tab. Use the dropdown lists next to the memory buttons to choose the particular branch you wish to recall, and then use the dropdowns next to them to choose from among the various measurements that were stored for that branch during the SIM 3 session. 7.4.9.
CHAPTER 7 Using SIM 3 7.5. UNDERSTANDING COHERENCE (VALIDITY OF THE MEASUREMENT) 7.5.1. Coherence Overview The coherence threshold is the level at which the SIM 3 analyzer accepts that the correlation of the data at the two measurement points is sufficient to present that data as a trace within the viewer at a particular frequency or subset of frequencies. Coherence is shown as a percentage, and the higher this percentage is, the more likely the measurement at that frequency is accurate. 7.5.2.
CHAPTER 7 Using SIM 3 7.5.3. Setting the Coherence Threshold Coherence Threshold percentages from 90% to 0% can be set within the Frequency Response measurement. Use the drop-down box at the bottom of the measurement window, or open the Frequency Response Settings dialog box by right-clicking within the measurement window or selecting it from the Settings menu.
CHAPTER 7 Using SIM 3 Figure 7.23. Same Frequency Response trace as in Figure 7.22., with Coherence trace set to 1/3 and Full window settings, using [+] and [-] buttons 7.5.5. Relationship of Coherence & Frequency Trace Typically, one can see a narrow and deep “hole” in the frequency trace directly below the area of the coherence trace showing very low coherence. If the coherence is sufficiently low, the trace may even be “blanked” at that point.
CHAPTER 7 Using SIM 3 (often the microphone in the room) is poorly related to the source signal. Low coherence in a Processor measurement would typically indicate that a delay within the signal processing path has not yet been compensated for in SIM 3 using Autoset Delay. CAUTION: The data from the two measurement points used for the transfer function must be synchronized in time in order for the response to be valid (and for the Coherence trace to show coherence).
CHAPTER 7 Using SIM 3 TIP: Right-click on the Frequency Response measurement screen and check View as Signal to Noise Ratio in the dialog, or go to View > Show Coherence as SN. The values at the cursor position will then be shown as dBSN in the Coh column of the Values tab and for the vertical graph scale, for both Live and stored traces. Figure 7.25. Frequency Response trace with corresponding dB signal-to-noise trace 7.5.8.
CHAPTER 7 Using SIM 3 NOTE: The “Acquiring Data” and “Data < Threshold” status box only applies to the traces that are currently displayed. For example, in a case where the Processor trace is above threshold and Room trace is not, the status box will say “Acquiring Data” when in the Processor view and “Data < Threshold” in the Room view. The Group view will also show “Data < Threshold.” 7.5.9.
CHAPTER 7 Using SIM 3 Figure 7.27. Frequency Response trace showing comb filtering 7.6. MOVING BETWEEN MEASUREMENTS 7.6.1. Overview SIM 3 allows the user to move through a variety of different measurements in the process of optimizing a sound reinforcement system. Combining Branches with the ability to analyze a section or the complete console-to-listener path provides the experienced SIM 3 user with a comprehensive tool set to make the sound system the best it can be for all of the audience. 7.6.2.
CHAPTER 7 Using SIM 3 7.6.3.1. Setup The functions of the console, and its drive levels can be assessed. Signal paths can be confirmed. Measurement mics can be tested and calibrated. This phase is the “is it all working and connected correctly” part of the measurement. 7.6.3.2. Spectrum Measurements The Band and Line Spectrum measurements are used initially to determine the levels and frequency content of the signals being measured, detect patching or connection problems, and set those levels properly.
CHAPTER 7 Using SIM 3 By taking and comparing measurement at each of three points within multiple branches of the total sound reinforcement system, the contribution of each element to the final audio result at each point in a venue can be determined. Benefits include: ■ Loudspeaker Positioning: Finding the best positioning of the loudspeakers for consistent audience coverage, and positioning of the loudspeakers in relation to each other and/or reflective surfaces to prevent destructive interference.
CHAPTER 7 Using SIM 3 Begin with the Room or Result view in Frequency Response, and either store the Live Branch trace or click Pause to make comparison easier. Then choose from the stored traces to view them with the Live trace. 7.7.3. Comparing Four Stored Traces SIM 3 can compare up to four stored traces at once. Use the Selector tab in memory locations A through D, via the dropdown lists or Recall DataGroup. Check the boxes to view each one. Including the Live trace, up to five traces can be compared.
CHAPTER 7 Using SIM 3 NOTE: Any offsets that have been made to a Live Branch trace are stored when that DataGroup is stored. When it is recalled, the offsets will automatically default to what they were when the trace was stored. The offsets can be changed in the normal manner in the Values tab when the trace is being viewed; however, if this trace is closed and then recalled, it will revert to the offset value when it was originally stored. Figure 7.30.
CHAPTER 7 Using SIM 3 CAUTION: Offsets should be used cautiously. The offset values only affect the displayed trace. Always keep track of the offsets to avoid any confusion between the level displayed on the screen and the real level of the system. 7.7.6. Using Smoothing for Trace Comparison Combined with Trace Offset, a 1/6 or 1/3 octave smoothing is useful when comparing frequency response measurements.
CHAPTER 7 Using SIM 3 Figure 7.32. Frequency Response trace shown with no smoothing, and with 1/6 and 1/3 octave smoothing. TIP: When comparing stored traces for level and frequency response trends, smoothing can be a useful tool. The traces are easier to lay over each other using the Trace Offset function when smoothed. Smoothing is not recommended for originally capturing Live trace data or when looking for more detailed information from a measurement.
CHAPTER 7 Using SIM 3 7.8. EQUALIZATION AND TUNING THE SYSTEM 7.8.1. EQ Overview Analyzing the sound system with SIM 3 provides accurate information to make system corrections, and to verify if the corrections yielded improvements.. Before applying EQ, typical corrections include: ■ Loudspeaker aiming and positioning changes. ■ Delay changes to correct any time anomalies where two or more loudspeakers are providing the same program material to the same area. ■ Relative level adjustments.
CHAPTER 7 Using SIM 3 Figure 7.33. The Group view in Frequency Response, with non-inverted processor trace 7.8.3. Inverse EQ & Overlaying an EQ Trace The View > Processor Inverted function is useful when making equalization corrections to a live Room trace in the Group view. When Processor Inverted is used, the Processor trace (orange) is shown as green to differentiate between the two forms of displaying this response.
CHAPTER 7 Using SIM 3 Figure 7.34. Using Processor Inverted to match and equalize the Room trace 7.8.4. Viewing Results of Equalization As the above equalization changes are being made, the Result trace in the upper window will change. This trace shows the effect of the correction on the Room trace, and is equivalent to what will be heard from the listening position where the measurement microphone is located.
CHAPTER 7 Using SIM 3 7.9. SAVING, EXPORTING, RELOADING MEASUREMENTS 7.9.1. Overview Saving SIM 3 measurements allows them to be used at a later time. A Project and all of its measurements can be saved to CD and viewed on a PC using the DataViewer, and various views can be captured File > Export or the computer’s print-screen function for use in presentations. 7.9.2.
CHAPTER 7 Using SIM 3 TIP: Only one directory can be selected to burn to a CD-R via the SIM-3 analyzer, so choose the highest directory level necessary to contain all of the files and Projects desired. By default, clicking Write to CD will copy all of the data files within SIM 3 to CD unless a specific directory has been selected; this method is recommended. 7.9.5.
CHAPTER 7 Using SIM 3 NOTE: To perform the best measurement, each of these levels should be brought up to a sufficient level, but not allowed to overload. 7.10.2. Console, Processor, Microphone For the typical Branch measurement, the meters show the following: ■ Console: Signal from the console or source, measured at the Console input to the SIM3022 analyzer or its connected switcher.
CHAPTER 7 Using SIM 3 Figure 7.35. Meter tab with Console, Processor, and Mic in the green zone 7.10.4. Setting dBV rms and Peak A dropdown list on the left side of each meter bar permits the selection of three different measurement units. The default is dBVrms. Other choices are dBVpeak and Volts. Set the levels appropriately for each of these units.
CHAPTER 7 Using SIM 3 7.10.5. Setting Meter Ranges A mentioned above, the [+] and [–] buttons under each meter are used to set the ranges of the meters. The scale at the top of each meter changes in 10-dB increments as these buttons are pushed. Alternately, Settings > Input Panel Settings or right-clicking on the Meters panel opens a dialog where the values for Console, Processor, and Microphone can be set. 7.10.6.
CHAPTER 7 Using SIM 3 7.11. MEASURING THD SIM 3 measures THD by looking at the level at the cursor, then searching for its first 9 harmonics (including noise). The levels of those harmonics are summed, and that level is calculated as a percentage of the fundamental’s level. A THD measurement is only valid if the signal being measured is a sine wave, and if the cursor is on the fundamental frequency of that sine wave. 7.11.1. Standard THD The standard THD measurement in SIM 3 goes to one decimal point (0.
CHAPTER 7 Using SIM 3 NOTE: To select frequencies for the high-precision THD measurement, first set the generator to Sine and enable High-Precision THD in the Spectrum and Meter Settings dialog. Go to the Line Spectrum measurement. Then use the Frequency knob on the front panel of the SIM 3 analyzer to scroll through the available octave frequencies, from below 20 Hz to 8 kHz.
CHAPTER 7 Using SIM 3 7.12. USING MEASUREMENT MODES The Mode menu facilitates the measurement steps when aligning a sound system by controlling loudspeaker muting in an organized manner. Global parameters, which may be varied within certain limits by the user, help guide the measurements process. The basic functions of these modes will be described in this manual; detailed information may be learned from SIM 3 training sessions and from the Meyer Sound Design Reference.
CHAPTER 7 Using SIM 3 To make and store Single System measurements, follow these steps: 1. From the Mode menu, select the Single System mode. The speaker in that branch will be enabled and all others muted. 2. Use Delay Finder to set the internal delay time. 3. Go to Frequency Response and acquire the measurement. 4. Store and name the measurement. Figure 7.38.
CHAPTER 7 Using SIM 3 7.12.3 Lobe Study The Lobe Study mode is used is to view the interaction from other loudspeaker systems into the coverage area of the branch being measured. In a lobe study, the main loudspeaker covering an area is turned off, and using the same measurement microphone position, the adjacent speaker(s) that are potentially placing audio energy in the same location can be turned on and measured.
CHAPTER 7 Using SIM 3 7.12.5. Show SIM 3 is designed to measure sound systems with an audience present, so certain functions that could disrupt a performance are disabled in Show mode. To enable Show mode, select Show from the Mode menu on the menu bar. SIM 3 will immediately: ■ Disable the Generator ■ Disable loudspeaker muting On the SIM 3 screen, the buttons on the Speakers tab will be grayed out, and will each show a green dot indicating that they are unmuted.
CHAPTER 7 Using SIM 3 7.12.6. Mic EQ SIM 3 provides an elegant solution for measuring and correcting the response of a microphone in its actual environment. The basic procedure is to measure and store the response of the microphone, and then use the noise generator in conjunction with an equalizer to match the mic trace. 7.12.7. Console Check Console Check allows the user to measure various parameters — including THD, polarity, and frequency response — across a mixing console.
CHAPTER 7 Using SIM 3 7.12.8. Mic Compare With the Mic Compare measurement, two microphones directly connected to the SIM3022 audio analyzer (or connected via microphone switchers) can be compared in their sensitivity and frequency response, and the differences will be shown via SIM traces on the display monitor. The response characteristics of the reference mic can be compared with the microphone assigned to the selected Branch. Use the following steps: 1.
CHAPTER 7 Using SIM 3 7.13. PERFORMING PROCEDURES The Procedures menu in SIM 3 provides step-by-step processes to perform common tasks. Click on a procedure, do each action in turn, and click for the next step. These windows stay on top of the main SIM 3 screen, yet allow all settings and operation of the measurements to be performed using the menus and tabs of the SIM 3 screen. 7.13.1.
CHAPTER 7 Using SIM 3 4. In the dialog box, the mic name is shown, along with the measured dBV value and the dBSPL value. Make sure the dBSPL value is the same as the calibrator’s value. If not, type the calibrator’s value (usually 94 dB) into the dBSPL field. Press OK. 5. The calculated mic sensitivity is mV/Pa will appear next to that mic in the Switcher dialog window. Figure 7.43. Calibrate measurement mics with Calibrate Microphone Figure 7.44.
CHAPTER 7 Using SIM 3 7.13.2. Check Noise The following procedure is used to check the noise floor. This is the step-by-step procedure as presented in SIM 3. First, select the device under test — Console, Processor, Speaker. 7.13.2.1. Measure Noise Floor — Console, Processor, or Room 1. Select the Band Spectrum measurement. Select the Console, Processor, or Room view. 2. Set the Generator to Off. Select Settings > Spectrum Settings and set Time Weighting to Accumulate.
CHAPTER 7 Using SIM 3 7.13.4.1. Verify Polarity — Processor 1. Select the Delay Finder measurement. Select the Processor view. Select Settings > Delay Finder Settings and set the Averages to Accumulate. Set the Generator to Noise. 2. Acquire the polarity value, by selecting Data > Store DataGroup. Store and name your measurement. NOTE: A positive-going impulse indicates a non-inverting path between the two measurement points. 7.13.4.2. Verify Polarity — Speaker 1. Select the Delay Finder measurement.
CHAPTER 7 Using SIM 3 7.13.5.1. Verify Coverage — Single Mic 1. Select the Frequency Response measurement. Select the Result view. Go to the bottom center of the SIM 3 screen and click on the Values tab. 2. Select the reference for the measurement. Coverage is verified by comparing the onaxis response to the response at the coverage edge. You must first store and recall a reference trace before moving the mic to the coverage edge.
CHAPTER 7 Using SIM 3 NOTE: The difference in level between the reference trace and the measured trace is: Coverage value = (Off-Axis Offset Value) — (On-Axis Offset Value). The nominal coverage target value is 6 dB. 6. Finally, acquire the system coverage value. Select Data > Store DataGroup. Store the data group with the Reference and off-axis traces, and record the coverage value for this channel into the Notes field. 7.13.5.2.
CHAPTER 7 Using SIM 3 3. Select Mode > Single System. Setting the Single System mode mutes the reference speaker and unmutes the live branch speaker. Now the SIM 3 delay needs to be updated, and the System Delay logged. The cursor will move to the peak (in its new location). Press the Autoset Delay button when ready. 4. Select Data > Store DataGroup for the measurement, and write the system delay that you set in the Notes field. 7.13.6.2. Set System Delay - Speaker/Room (Internal to or Post-Processor) 1.
CHAPTER 7 Using SIM 3 3. Make sure that an audio signal is available and coming through the system — either program material or noise. This is the source of the live trace that is being compared with the reference. 4. Using the Trace Offset buttons, move the Room/Speaker live trace up/down until it matches the reference trace. 5. Set the level by adjusting the system level until the Processor trace has moved to the center of the Processor screen and the result trace matches the reference. 6.
CHAPTER 7 Using SIM 3 7.13.8.1. Set System Equalization — Processor — Live 1. Select the Frequency Response measurement. Select the Group view. Go to the bottom center of the SIM 3 screen and click on the Values tab. 2. Equalization can be done with live data alone or with reference to one or more stored traces. To recall a trace from memory, select Data > Recall DataGroup. Click on the name of the data group to be the reference. Select the Memory row (A through D) in which to place it, and press Recall.
CHAPTER 7 Using SIM 3 7.13.8.3. Set System Equalization — Speaker-Room — Live 1. Select the Frequency Response measurement. Select the Room view. Go to the bottom center of the SIM 3 screen and click on the Values tab. 2. Equalization can be done with live data alone or with reference to one or more stored traces. To recall a trace from memory, select Data > Recall DataGroup. Click on the name of the data group to be the reference.
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CHAPTER 8 SIM 3 Menus CHAPTER 8: SIM 3 MENUS 8.1. FILE The file menu is where all file-related actions occur. The following section will describe the menu selections and their functions, and then will step through the process of saving and opening a SIM 3 file. Figure 8.1. The File menu dropdown 8.1.1. New When a new file is being created, the user will first be asked whether all current measurement data, settings, and labeling should be cleared, and the default settings be shown.
CHAPTER 8 SIM 3 Menus 8.1.3. Save To perform an ongoing save during a SIM 3 session, select File > Save. All new data will be saved to the existing file. If a file has not been created and named, the first time that File > Save is clicked a dialog will appear asking the user to name and save the file. It is a good idea to save regularly during a session. Control + S will also initiate this action. 8.1.4. Save As To initially save and name a file, choose Save As.
CHAPTER 8 SIM 3 Menus 8.1.6. Import Settings Selecting this feature will allow the user to select a previously saved SIM 3 file, and bring all of its settings into a new SIM 3 session while leaving out the data files. TIP: Import Settings is especially useful when a previous session’s branches, names, and other settings are identical or similar to what is needed in the new session – saving a considerable amount of setup time. 8.1.7.
CHAPTER 8 SIM 3 Menus 8.1.11. Eject CD Selecting this item will eject the CD from the drive in the analyzer. 8.2. VIEW The View menu provides access to various features of the SIM 3 screen. Often these features can also be found as buttons on the screen or as hot keys. Figure 8.2. The View menu dropdown 8.2.1. View Cursor Selecting this item places a red vertical cursor on the graph window(s).
CHAPTER 8 SIM 3 Menus 8.2.2. Cursor Peak Track Selecting this item will automate the cursor so that it continually goes to the location of the peak amplitude. Cursor Peak Track may also be enabled using the P hot key. NOTE: Cursor Peak Track is disabled by clicking with the mouse anywhere on the graph window, at which time it becomes the normal cursor. 8.2.3. Views for Band and Line Spectrum 8.2.3.1.
CHAPTER 8 SIM 3 Menus 8.2.4.3. Result Selecting this item selects the Result graph window view in the Delay Finder and Frequency Response measurements. 8.2.4.4. Group Selecting this item selects a two-window view in the Frequency Response measurement, with the Processor and Room traces in the lower window, and the Result trace in the upper window. 8.2.4.5.
CHAPTER 8 SIM 3 Menus Figure 8.4. Band Spectrum measurement with Max and Max Hold 8.2.7. Band Spectrum Solid This item will change the view of the 1/3 octave view in Band Spectrum from a stepped line to a series of vertical bars. Figure 8.5. Band Spectrum Solid with Max and Max Hold 8.2.8. Vertical Zoom In all measurements, this item will change the number of measurement units per division in the graph windows.
CHAPTER 8 SIM 3 Menus 8.2.10. Processor Inverted Selecting this item inverts the processor trace, so that a cut appears as a boost, and vice versa. This green trace, which is the default, aids in conforming EQ corrections to the Room response in the Group view in Frequency Response. 8.2.11. Phase Center at Zero Selecting this item places the center of the phase trace in the Frequency Response graph windows in the center of the window, with +180 degrees and -180 degrees at the outer edges.
CHAPTER 8 SIM 3 Menus 8.2.12. Show Coherence as SN Selecting this item changes the coherence trace in the Frequency Response measurements to S/N (signal to noise) rather than a percentage. 8.2.13. Smoothing Selecting this item allows the user to view the measurement data in the various Frequency Response graph windows with 1/6 octave or 1/3 octave smoothing. 8.2.14.
CHAPTER 8 SIM 3 Menus 8.3. BRANCH Figure 8.9. Branch menu dropdown, showing generic branch names 8.3.1. Edit Branches Selecting this item opens the Branches dialog box. The dialog box has three tabs, for Branches, Switchers, and Front Panel. The same dialog may be opened by selecting Settings > Branches or using the B hot key. 8.3.2.
CHAPTER 8 SIM 3 Menus 8.3.3. Next Branch Selecting this item chooses the next branch to the current Live branch, signals the switchers to make the proper connections for that branch, and begins measurement. Using Alt + B and then the N key initiates the same action. TIP: This same feature may be accessed via the Selector tab using the plus [+] button in the Live Branch row. 8.3.4. Branch 0 – Branch 32 Each of these items represents a branch that has been created and named in the Branch dialog.
CHAPTER 8 SIM 3 Menus 8.4.2. Front Panel Selecting this item opens the Front Panel dialog box, permitting the naming and selection of other parameters for the connectors on the front panel of the SIM-3022 audio analyzer. The 48V setting for microphone phantom powering is also selected here. 8.4.3. Branches Selecting this item opens the Branches dialog box, allowing the naming and building of branches, and well as adding and deleting branches. 8.4.4.
CHAPTER 8 SIM 3 Menus 8.4.6. Delay Finder Settings Selecting this item will open a dialog box with settings specific to the Delay Finder measurement. Choices include: ■ Analysis Time ■ Amplitude Threshold ■ Number of Averages ■ Delay Value Fields for Processor and Room Measurement (delay values to 0.01 ms) This dialog box can also be opened by right-clicking the mouse over the screen when Delay Finder is selected as measurement. 8.4.7.
CHAPTER 8 SIM 3 Menus These settings can also be adjusted using the [+] and [–] buttons in each of the three meters. The ranges for each of the inputs are: ■ Console — 3.59 mVpk to 113 Vpk (-49 dBVpk to +41 dBVpk) ■ Processor — 3.59 mVpk to 113 Vpk (-49 dBVpk to +41 dBVpk) ■ Microphone, Front-Panel — 3.59 mVpk to 113 Vpk (-49 dBVpk to +41 dBVpk) ■ Microphone, Mic Switcher — 0.59 mVpk to 18.5 Vpk (-65 dBVpk to +25 dBVpk) NOTE: The +41 dB setting does not apply to line or mic switchers, and is grayed out.
CHAPTER 8 SIM 3 Menus 8.4.9. Mouse Settings The Mouse Settings dialog box allows adjustment to be made to the mouse cursor. The two value ranges are for Acceleration (1 through 6) and Threshold (0 through 100). Acceleration allows the user to set the speed of cursor travel in pixels, with the lower values meaning a larger mouse movement is needed to move the cursor over a smaller portion of the screen, for very fine movement control.
CHAPTER 8 SIM 3 Menus 8.5.3. Lobe Study This mode mutes the loudspeaker system connected to the Live Branch and allows you to un-mute other systems. 8.5.4. Combined Systems This mode allows the combination of multiple loudspeakers. 8.5.5. Show This mode is used when performing SIM 3 measurements during a performance. It prevents loudspeakers from being accidentally muted, and also disables the Generator. 8.5.6.
CHAPTER 8 SIM 3 Menus 8.6. PROCEDURE The Procedures are step-by-step methods to perform certain measurements using SIM 3. The dialog box will remain on the screen, providing instructions while the various settings are changed to perform the measurement. Figure 8.13. The Procedure menu dropdown 8.6.1. Mic SPL Calibration This procedure is used to determine the sensitivity of a measurement microphone, using an external calibrator.
CHAPTER 8 SIM 3 Menus 8.6.5. Verify Coverage This procedure is used to verify the horizontal and vertical coverage angles of the loudspeaker systems. NOTE: This verification is essential when positioning loudspeakers – making sure that coverage overlaps in constructive rather than destructive (comb filtering and other frequency-dependent cancellation) ways. 8.6.6.
CHAPTER 8 SIM 3 Menus Figure 8.14. The Data menu dropdown 8.7.2. Store DataGroup Selecting this item when performing a measurement using the Live Branch will save the current measurement and all its settings and parameters, open the Store DataGroup dialog box, allow the measurement to be named, and present a note field for any additional notes. Measurements may also be stored using the Store button next to the Live Branch row in the Selector tab. Pressing the F4 key also performs this function. 8.7.3.
CHAPTER 8 SIM 3 Menus lower right corner of the graph view window may also be used; it works as a toggle to unpause. Pressing the Space bar will also pause the measurement. TIP: Using Pause is useful to temporarily stop the trace from moving, easing comparison with stored traces. 8.7.6. Live Selecting this item will hide the Live Branch trace. The tilde key (~) will also toggle the Live trace view. 8.7.7.
CHAPTER 8 SIM 3 Menus 8.8. GENERATOR 8.8.1. Pink Noise (Nz) Clicking on Noise opens a dialog box with three level settings, -20 dB (the default), 0 dB, and +14 dB. Figure 8.15. The Generator menu dropdown 8.8.2. Sine Wave (Sine) Clicking on Sine opens a dialog box that allows the setting of sine wave frequency, increments with [+] and [–] buttons, and a series of level settings. The default frequency is 1,000 Hz, and default increment is 1 Hz; desired values may be entered. Levels are: ■ -20 dB (0.
CHAPTER 8 SIM 3 Menus 8.9.1. Band Spectrum Selecting this item opens the Band Spectrum measurement. The measurement may also be selected from the tabs on the SIM 3 screen, or by using the A hot key. 8.9.2. Line Spectrum Selecting this item opens the Line Spectrum measurement. The measurement may also be selected from the tabs on the SIM 3 screen, or by using the S hot key. 8.9.3. Delay Finder Selecting this item opens the Delay Finder measurement.
CHAPTER 8 SIM 3 Menus 8.10. HELP Figure 8.17. The Help menu dropdown 8.10.1. About SIM 3 Selecting this item will provide information about the software version of SIM 3, as well as the display monitor resolution. A list of the hardware within the current SIM 3 system will also appear. 8.10.2. Contents The Contents area contains various descriptions and diagrams to aid the setup and measurements using SIM 3.
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APPENDIX A SIM 3 Specifications APPENDIX A: SPECIFICATIONS SIM-3022 AUDIO ANALYZER Front Panel Front-Panel Audio Connectors Generator Output One (1) XLR-3M Line Inputs Two (2) XLR-3F Mic Inputs Two (2) XLR-3F NOTE: Mic inputs may also be used with line-level signals by turning off the 48-V phantom power in the SIM 3 software. Input Level Settings 3.59 mVpk to 113 Vpk (-49 dBVpk to +41 dBVpk), in 10-dB steps NOTE: All input levels set within the SIM 3 software. See Chapter 6, Section 6.
APPENDIX A SIM 3 Specifications SIM-3088 LINE SWITCHER Front Panel LED Indicators Sixteen (16) on/mute; sixteen (16) bus-select; Two (2) each console/processor select; one (1) bus power; one (1) data Switches One (1) bus address; one (1) mute safe Rear Panel Bus Connectors One (1) each multi-pin, connection to analyzer and connection to additional line switchers Audio Connectors Four (4) 25-pin D-Sub, to proprietary fan-out cables with eight XLR-3M Input Level Settings 3.59 mVpk to 35.
APPENDIX B SIM 3 Components and Accessories APPENDIX B: SIM 3 COMPONENTS AND ACCESSORIES NOTE: For detailed and updated information on accessories, please visit www.meyersound.com and look for the SIM 3 accessories page.
APPENDIX B SIM 3 Components and Accessories 212 Monitor, 17-Inch LCD Flat Screen Optimized for use with SIM 3, folds flat for travel Lighted Keyboard with PS-2 Connector For use in darker production settings Optical Mouse With PS-2 Connector SIM Bus & Extender Cables 1 meter bus, and 5 and 30 meter extenders D-Sub to XLR Fan-Out Cables line switcher to audio system connection; set includes two each D-Sub to 8 XLR female and D-Sub to 8 XLR male D-Sub Extension Panel 1-RU rack panel brings D-Sub c
APPENDIX B SIM 3 Components and Accessories SIM 3 Rack 3-RU rack with recessed front and rear rack rails; fits SIM-3022 analyzer plus a SIM-3088 line-level switcher Switcher Rack 3-RU rack with recessed front rack rails, for line and mic switchers SIM 3 Case Road case carries 3-RU switcher rack, mic switcher, and cables Mic Switcher Mounting Tray For rack-mounting one or two side-byside SIM 3081 mic switchers or SIM3004 remote power supplies Mic Switcher Boot Half-width, 1-RU rack protects mic swit
APPENDIX B SIM 3 Components and Accessories 214
APPENDIX C Extended Table of Contents APPENDIX C: EXTENDED TABLE OF CONTENTS CHAPTER 1: SIM 3 Measurement Terminology ...............................................3 CHAPTER 2: The SIM 3 Hardware ................................................................11 2.1. SIM-3022 Audio Analyzer ........................................................................................... 11 2.1.1. Front Panel ........................................................................................................
APPENDIX C Extended Table of Contents 2.3.1.1. Address Switch ............................................................................................ 37 2.3.1.2. Microphone Inputs ....................................................................................... 38 2.3.1.3. LED Indicators ............................................................................................. 38 2.3.1.4. Status...................................................................................................
APPENDIX C Extended Table of Contents 4.3. New Version Updating Procedure............................................................................... 70 4.4. Installing the Setup and DataViewer for PC ............................................................... 71 4.4.1. Setup and DataViewer Installation Procedure ..................................................... 72 4.4.1.1. System Requirements ................................................................................. 72 4.4.1.2.
APPENDIX C Extended Table of Contents 5.4.1. Overview ............................................................................................................. 93 5.4.2. Description of the Measurement ......................................................................... 94 5.4.3. Room ................................................................................................................... 95 5.4.4. Processor .................................................................................
APPENDIX C Extended Table of Contents CHAPTER 7: Using SIM 3 ...............................................................................117 7.1. Starting a Project ...................................................................................................... 117 7.1.1. Setting Up the File Name and Notes................................................................. 117 7.1.2. Opening an Existing Project .............................................................................. 118 7.1.3.
APPENDIX C Extended Table of Contents 7.4.9. Deleting Measurements .................................................................................... 144 7.4.9.1. Select Multiple DataGroups for Deletion ................................................... 144 7.4.9.2. Adjacent DataGroups ................................................................................ 144 7.4.9.3. Non-Adjacent DataGroups ........................................................................ 144 7.5.
APPENDIX C Extended Table of Contents 7.9.6. Opening Saved Measurements ......................................................................... 162 7.10. Using Meters........................................................................................................... 162 7.10.1. Overview ......................................................................................................... 162 7.10.2. Console, Processor, Microphone .................................................................
APPENDIX C Extended Table of Contents 7.13.8.1. Set System Equalization — Processor — Live ....................................... 182 7.13.8.2. Set System Equalization — Processor — Silent EQ................................ 182 7.13.8.3. Set System Equalization — Speaker-Room — Live ................................ 183 CHAPTER 8: SIM 3 menus .............................................................................185 8.1. File ..........................................................................
APPENDIX C Extended Table of Contents 8.2.14. Trace Offsets ................................................................................................... 193 8.2.15. Graph Background White ................................................................................ 193 8.3. Branch ...................................................................................................................... 194 8.3.1. Edit Branches ...........................................................................
APPENDIX C Extended Table of Contents 8.7.4. Clear .................................................................................................................. 203 8.7.5. Pause ................................................................................................................ 203 8.7.6. Live .................................................................................................................... 204 8.7.7. Memory A – Memory D ...................................................
Meyer Sound Laboratories Inc. 2832 San Pablo Avenue Berkeley, CA 94702 www.meyersound.com T: +1 510 486.1166 F: +1 510 486.8356 © 2005 Meyer Sound Laboratories Inc. 05.136.060.
