VDC-48 Loudspeaker Management System User Manual
Important Safety Instructions 1. READ THESE INSTRUCTIONS All the safety and operating instructions should be read before the product is operated. 2. KEEP THESE INSTRUCTIONS The safety and operating instructions should be retained for future reference. 3. HEED ALL WARNINGS All warnings on the product and in the operating instructions should be adhered to. 4. FOLLOW ALL INSTRUCTIONS All operating and use of instructions should be followed. 5.
8. DO NOT INSTALL NEAR ANY HEAT SOURCES This Product should be situated away from heat sources such as radiators, stoves, or other products (including amplifiers) that produces heat. 9. DO NOT DEFEAT THE SAFETY PURPOSE OF THE POLARIZED OR GROUNDING-TYPE PLUG A Polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prongs are provided for your safety.
Table of Contents Table of Contents ................................................................... 4 1.0 Introduction .................................................................... 5 2.0 Features .......................................................................... 6 3.0 Front Panel Functions ................................................... 7 4.0 Rear Panel Functions .................................................... 9 5.0 Powering Up the Device ........................................
1.0 Introduction The VDC-48 is a digital loudspeaker management system designed for the touring or fixed sound installation markets. The absolute latest in available technology is utilized with 40-bit floating point processors and high performance 24-bit Analog Converters. The high-bit DSP prevents noise and distortion induced by truncation errors of the commonly used 24bit fixed-point devices.
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3.0 Front Panel Functions 1 2 6 3 5 4 7 8 1. USB – a standard Type B USB connector. Device driver from the provided software CD must be installed prior to usage. 2. RS232 – a standard female DB9 socket. A straight through cable is required for PC connection. 3. Mute (Channel Menu) Buttons – Mute or un-mute input and output channels. When an input channel is muted, a red LED will come on for indication.
5. Peak Level LED – Indicates the current peak level of the Signal: Signal, -12dB, -6dB, -3dB, Over/Limit. The Input Limit LED references to the device's maximum headroom. The Output Limit LED references to the threshold of the output limiter. 6. LCD – Shows all the necessary information to control the unit. 7. Menu Buttons – There are 6 menu keys: <
4.0 Rear Panel Functions 1,2,3 4 5 1. Main Power – Connects via a standard IEC socket. A compatible power cord is supplied with the unit. The voltage input is 90-240VAC, 50-60Hz. 2. Main Fuse – T2.5A-250V. Slow blow type. 3. Power switch – Controls power On/Off. 4. Ethernet – RJ45 connector for Ethernet control. The device should be connected to a router/switch/hub via a straight through CAT-5 cable. 5. Analog Inputs and Outputs – Separate 3-pin connectors are provided for each audio input and output.
5.0 Powering Up the Device • After powering up the unit, the following initialization screen is displayed on the LCD: VIETA VDC-48 VDC-48 v7.05 • The initialization process takes several seconds and during that period the unit boots and displays the device model and firmware version. • After the initialization process is finished the VDC-48 displays its main screen: VIETA VDC-48 P01* • The screen shows the current program number and program name assigned to the unit.
6.0 Operating the Channel Menus Channel Linking – While holding down the <
DELAY: The maximum delay permitted is 650ms, in steps of approximately 10us. It can be displayed in ms, ft or m. The time unit of the delay is set in the System Menu. Please refer to page 21 for more details. I1: Signal DELAY:000.000ms 6.2 Input/Output Equalizer EQ#: Each input channel has 8 bands of equalization. This control selects one of the 8 available bands. I1: EQ#:1 EQ1 BYPASS: This control will un-bypass (Off) or bypass (On) the currently selected band.
BW: The EQ bandwidth ranges from 0.02 to 3.61 octaves in steps of 0.01 octave. The equivalent Q value is automatically shown besides the octave value. For 1st degree all-pass (AP-1) filter, the bandwidth will sets the phase shift at the centre frequency. This phase shift is gradually changed from 180 degrees above the centre frequency to the specified value. I1: EQ1 DEG:15.5 deg I1: EQ1 BW:0.33 Q=4.36 LEVEL: The EQ level (or gain) ranges from -30.00dB to +15.00dB in 0.25dB steps. I1: EQ1 LEVEL:0.00dB 6.
6.4 Input/Output Crossover TYPL: The 3 available filter types for the low frequency crossover point (high pass) are: Butterworth, Linkwitz Riley or Bessel. O1: TYPL:Off XOver FRQL: The filter cut-off frequency for the low frequency crossover point (high pass) ranges from 20 to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency steps can be selected in the System Menu. Please refer to page 21 for more details.
FRQH: The filter cut-off frequency for the high frequency crossover point (low pass) ranges from 20 to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency steps can be selected in the System Menu. Please refer to page 21 for more details. O1: XOver FRQH:1000Hz SLPH: The filter slope for high frequency crossover point (low pass) ranges from 6 to 48dB/octave. If the selected filter type is Linkwitz Riley, the available slopes are 12, 24, 36 or 48 dB/octave only.
6.5 Input Compressor THRESH: The compressor threshold ranges from -20 to +20dBu in 0.5dB steps. O1: Comp THRESH:+20.0dB ATTACK: The compressor attack time ranges from 0.3 to 1ms in 0.1ms steps, then ranges from 1 to 100ms in 1ms steps. O1: Comp ATTACK:10ms RELEASE: The compressor release time can be set at 2X, 4X, 8X, 16X or 32X the attack time. O1: Comp RELEASE:8XAtck RATIO: The compressor ratio is the slope in which the signal is compressed. It ranges from 1:1 to 1:40. O1: Comp RATIO: 1:1 6.
6.7 Output Limiter THRESH: The limiter threshold ranges from -20 to +20dBu in 0.5dB steps. O1: Limit THRESH:+20.0dB ATTACK: The limiter attack time ranges from 0.3 to 1ms in 0.1ms steps, then ranges from 1 to 100ms in 1ms steps. O1: Limit ATTACK:10ms RELEASE: The limiter release time can be set at 2X, 4X, 8X, 16X or 32X the attack time. O1: Limit RELEASE:8XAtck 6.8 Output Source IN1-4: This sets the input channel source for the current output channel.
7.0 Operating the System Menus The System Menus allow the user to control and change parameters that are related to the system behavior and general operation. It can be accessed by pressing the Sys key in the main menu (when no Input/Output or System Menu is activated). All System Menus require pressing the Enter key to confirm and save the settings. 7.1 Preset Recall The VDC-48 has a built in non-volatile memory that can store up to 30 different preset setups.
NAM: A descriptive name of up to 12 characters can be assigned to each program. SYSTEM NAM: 7.4 Store Device Configuration MODE: The unit assigns the Input source for the corresponding outputs when the Mode of Operation is changed. The crossover point parameters like the filter type, cut-off frequency and slope have to be configured manually in the Crossover Menu for each Output Channel.
SOURCE: This is the channel to be copied from. SYSTEM SOURCE:In1 Copy TARGET: This is the channel to be copied to. SYSTEM TARGET:In2 7.6 Copy General Settings FREQ MODE: This changes the frequency control mode for EQ and crossover filters. can be 36 steps/octave or All Frequencies (1 Hz resolution). SYSTEM Generl FREQ MODE:All DELAY UNIT: This sets the time unit for input and output delay to ms, ft, or m.
7.7 Communication Settings NOTE: User must power cycle the unit for this settings to take effect. BAUD RATE: The sets the baud rate of the serial communication. XConsole uses a baud rate of 115200, it should be left unchanged for most user. SYSTEM Comm BAUD RATE:115200 DEVICE ID: This control assigns a device ID from 1 to 16 to the unit. This ID is only useful when a network of more than 1 unit is used in conjunction with 1 or more XPanel.
Eth-GW: The gateway address of the network. Usually, this should be the IP address of your router/switch/hub address. SYSTEM Eth-GW :255.255.255.255 Eth-SM: The sets the subnet mask used by your network. SYSTEM Eth-SM :255.255.255.255 7.9 Security Password The factory default password is blank (“ combination of 4 characters in this menu. ”), it can be changed to any OLD PW: The user is required to enter the old password first to modify the password.
7.10 Security Lock The VDC-48 enables the user to secure the unit and prevent undesired changes in the setup. In order to lock or unlock the unit the user must enter the correct password. The user can only lock or unlock all menus using the front panel, XConsole is required to lock or unlock individual menu. PASSWORD: The password is 4 characters in length. The factory default of a new unit does not require a password. The user can change the password via XConsole or the Set Password menu.
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9.0 PC Control Software The V D C - 4 8 is shipped with a special PC Graphic User Interface (GUI) application - XConsole. XConsole gives the user an option to control the unit from a remote PC via the serial communication link. The GUI application makes it much easier to control and monitor the device, allowing the user to get the whole picture on one screen. Programs can be recalled and stored from/to PC’s hard drive, thus expanding the storage to become virtually limitless.
10.0 Specifications Inputs and Outputs Input Impedance: Output Impedance: Maximum Level: Type: >10k Ohms 50 Ohms +20dBu Electronically balanced Audio Performance Frequency Response: Dynamic Range: CMMR: Crosstalk: Distortion: +/- 0.1dB (20 to 30kHz) 115dB typ (unweighted) > 60dB (50 to 10kHz) < -100dB 0.002% (1kHz @+4dBu) Digital Audio Performance Processor: 40-bit Sampling Rate: 96kHz Analog Converters: High Performance 24-bit Propagation Delay: 1.
Dimensions: Weight: 19”x1.75”x9” (483x44x229 mm) 10 lbs / 4.5 kg Audio Control Parameters Mic Gain: 0to +45dB in 3dB steps Gain: -40 to +15dB in 0.25dB steps Polarity: +/Delay: Up to 650ms per I/O Equalizers (8 per I/O) Type: Parametric, Hi-shelf, Lo-shelf, Phase 1, Phase 2 Gain: -30 to +15dB in 0.25dB steps Bandwidth: 0.02 to 3.61 octaves (Q=0.3 to 72) 31-Band Graphic Equalizers (1 per Input) Gain: -30 to +15dB in 0.
11.0 Warranty The VDC-48 is warranted covering materials and workmanship for a period of two (2) years, as determined by the date of retail purchase (according to the sales receipt from an authorized dealer) or the date of manufacture if the sales receipt is not available (according to the serial number). This warranty applies to the product; therefore, the remainder of the warranty period will be automatically transferred to any subsequent owner.
VDC-48 User Manual V1.1 www.vietapro.
