AM-4 Digital Audio Machine Hardware and Software Reference Manual
PLACE HOLDER FOR THE BACK OF THE FRONT COVER DO NOT PRINT!!! ii Welcome!
Digital Audio Machine User’s Guide Alcorn McBride Inc.
Every effort has been made to assure the accuracy of the information contained in this manual, and the reliability of the Alcorn McBride AM-4 Digital Audio Machine hardware and software. Errors can sometimes go undetected, however. If you find one, please bring it to our attention so that we can correct it for others. Alcorn McBride welcomes comments and suggestions on the content and layout of its documentation. Applications described herein are for illustrative purposes only. Alcorn McBride Inc.
Table of Contents Technical Support ......................................... 2 Fields in Detail ..................................................30 Restrictions........................................................33 Comments & Whitespace ..................................33 Order of Operations ...........................................33 Double Occupancy ............................................34 Quick Start Guide ............................................... 3 Schedule Builder ..............
Welcome! A Compact Flash card is included with your AM-4. Thank you for purchasing The Alcorn McBride AM-4 Digital Audio Machine™. The AM-4 Digital Audio Machine replaces tape machines, CDs and solid state audio players in permanent audio playback installations, providing hours of high-quality, maintenance-free digital audio. The AM-4 Digital Audio Machine plays MP3 audio files from rugged Compact Flash media cards. Any size up to 2 Gbytes can be used, providing hours of MP3 audio.
Features The AM-4 Digital Audio Machine offers a wide range of features including: • Plays MP3 and WAV files. • Plays from Compact Flash Storage. • Near instantaneous access to files. • Stores over 500 Tracks. • Sophisticated Play List and Real-Time Clock scheduling capabilities. • Serial RS-232C, Parallel, or optional UDP control over Ethernet. • Optional Speaker Level outputs (20Wx2). • Optional Balanced outputs. • Optional S/PDIF Digital Audio output.
Quick Start Guide Throughout this manual you will find detailed discussions on all the features of the product. But below are a few points to get you going with the AM-4 Digital Audio Machine right out of the box! Playing the Demo Material Your AM-4 Digital Audio Machine comes complete with a Compact Flash Card already loaded with demo material. File number one is an MP3 audio file. You can play it by doing the following: • Don’t plug anything in yet.
4 Quick Start Guide
Controls and Indicators The AM-4 Digital Audio Machine provides controls that can accommodate a wide variety of installations. The front panel incorporates a test button, status indicator, Compact Flash Card slot. The rear panel provides the line-level audio outputs and control connectors. Depending on which option cards are installed, the rear panel can also contain speaker-level outputs or balanced and S/PDIF digital audio outputs, or an Ethernet jack.
Test Button Be sure that the Write Protect DIP switch is OFF before trying to format the Compact Flash. Use your PC to format Compact Flash cards larger than 2G in size.' A recessed push-button is located on the front of the unit. This button is used to “test” play the unit and will play the first file found on the media. It could be a either a sound file or a playlist. The test button is also used to format the Compact Flash card.
Configuration DIP Switch Voltage / Contact Closure Select Switch A 4 key DIP switch (red with white keys) is located on the rear of the unit below the DB-37 Control Connector. Its first key selects between voltage inputs or contact closures for the discrete controls. More information on these inputs may be found in the section entitled Rear Panel Connectors. For contact closure mode, push the DIP switch #1 to “ON”.
Serial Port Mode Refer to the GPS section in this manual for details. 8 For normal serial port control, turn off the fourth key on the 4 key DIP switch. To enable GPS mouse operation, turn this switch ON.
Volume Control and Audio Outputs To increase volume rotate the post clockwise. The RCA outputs provide a standard -10dbu unbalanced signal. Please refer to the Advanced Serial Control section of this manual for details. The volume control is the gray colored post protruding from the rear of the unit next to the RCA jacks. It controls volume for the RCA line level outputs, as well as for the optional speaker or balanced outputs. It does not control the volume on the optional S/PDIF digital audio output.
Ethernet Interface (optional) The AM-4 Digital Audio Machine can be ordered with an optional Ethernet Module which adds control and file transfer capabilities to the AM-4 over a standard Ethernet connection. The Ethernet interface is provided on a standard RJ-45 jack. Two LED indicate Ethernet status as shown below. The Green LED should be on whenever an active Ethernet connection is detected, and the Yellow LED flashes whenever Ethernet activity occurs.
Parallel Port: DB-37 Connector Be sure to configure the AM-4 Digital Audio Machine for contact closures or voltage inputs before connecting any wires. Note: The Fault output relay will be active (closed) immediately after power-up indicating that power was lost. The first valid command causes the relay to open. This connector provides all of the signals needed to interface to the AM-4 Digital Audio Machine.
Controlling the AM-4 Parallel Control Parallel Inputs Be sure to configure the DIP switch before connecting any wires. The AM-4 Digital Audio Machine can be controlled using either contact closures or voltage inputs on the female DB-37 Control Connector. DIP switch number 1 selects between the two input types. Voltage inputs are rated for 24 VDC. The table below describes the function of each input.
The table below shows the binary combinations possible, and what file they select: 8 4 2 1 File Off Off Off Off None Off Off Off On 1 Off Off On Off 2 Off Off On On 3 Off On Off Off 4 Off On Off On 5 Off On On Off 6 Off On On On 7 On Off Off Off 8 On Off Off On 9 On Off On Off 10 On Off On On 11 On On Off Off 12 On On Off On 13 On On On Off 14 On On On On 15 For example, connecting pins 8 and 27 together with the slide swi
Playlist Increment/Decrement & Volume Control Mode If the Loop input is activated on power-up, the File Select inputs operate as Playlist and Volume Increment/Decrement as shown here: File Select 1 = Increment Playlist Number File Select 2 = Decrement Playlist Number File Select 4 = Increase Volume File Select 8 = Decrease Volume This allows the use of just two toggle switches for playlist selection and volume control.
Using a terminal block to hold the diodes makes the wiring neater.
Voltage inputs, such as from a PLC, could be wired this way: I/O CONNECTOR 1 20 2 21 3 22 4 23 5 24 6 25 7 26 8 27 9 28 10 29 11 30 12 31 13 32 14 33 15 34 16 35 17 36 18 37 19 Contacts Voltage Switch set to voltage PLC 24 Volt Output 1 24 Volt Output 2 24 Volt Output 4 24 Volt Output 8 Ground Reference CONNECTOR DB37 Diodes are not needed, since the PLC can actuate any combination of lines desired. Parallel Outputs Two status outputs are provided. They are dry contact closures rated at 24 VDC and 0.
Simple Serial Control For serial communications with a PC or an Alcorn McBride Show Controller, use the supplied straight-thru (not Null) serial cable supplied with the AM-4. UDP communications take place on Port 2639. The AM-4 Digital Audio Machine may be controlled using serial RS-232C messages via the rear DB-9 Programming Connector, or with UDP (User Datagram Protocol) messages via the optional Ethernet interface.
Select File Description: Command Bytes: Message Response: Comments: Examples: This command causes the AM-4 Digital Audio Machine to select the specified audio track or Play List on the currently selected media. Once this command is sent, the next Play command causes the specified file to play from the beginning. The unit defaults to file #1 at power-up, unless an autoexec file exists. When receiving this command, the AM-4 Digital Audio Machine always looks for the file on the currently selected drive.
Loop File Description: Command bytes: Message Response: This command is the same as the Play File command, except the sound is looped back to the beginning at the end. nLP Where n is the file number or name (surrounded in quotes). Example: 3LP loops file number 3. Example: “rain.mp3”PL loops the file named “rain.mp3” R Pause Description: Command bytes: Message Response: Comments: This command causes the AM-4 Digital Audio Machine to pause.
Advanced Serial Protocol Many of these commands and error codes are listed in the AM4’s onboard menu. Type /? And press Enter to see it. The table below shows the complete AM-4 Digital Audio Machine serial protocol, including the Pioneer LDP compatible commands and our extensions. Using these commands, an external controller or PC can accomplish extremely complex tasks. Throughout the following table means carriage return, a byte with the hexadecimal value of 0D.
Media Commands Description Command Bytes Drive Directory Request Format Drive ?D FO Total Storage Request ?R Response ASCII table R upon receipt R upon completion nnnnnnn Comments Write protect DIP switch must be in the OFF position number of bytes (hex) Scheduler & GPS Commands Description Command Bytes Response Set Time Zone nTZ R Set Longitude nLO R Set Latitude nLA R Set Longitude/Latitude Tolerance used for GPS triggering. ddmm.
Ethernet Commands Description Command Bytes Response Set IP Address Set Subnet Mask Set Gateway Get IP Address Get Gateway Address Get Subnet Mask Set FTP User Name xxx.xxx.xxx.xxxIP xxx.xxx.xxx.xxxSM xxx.xxx.xxx.xxxGW IP GW SM nUS R R R IP String DefaultGateway Subnet Mask R Get FTP User Name Set FTP Password US pPW ASCII string R Get FTP Password Enable NTP Set NTP Server Address Get NTP Server Address PW 1NE xxx.xxx.
Soft reboot the MP3 AM XX -- used in a schedule. Same as power-on reset. Notes: 1) 2) 3) When using the SendString command, ASCII Strings are surrounded by quotes, HEX bytes begin with H. Example h22This is an ASCII Stringh22SS or “This is an ASCII String”SS in a play list text file. Once a Manual Output Relay command is received, the Play and Fault outputs will no longer operate as their default “Play” and “Fault” functions.
network. See the Web Page Setup section for information on setting IP Address and Unit ID. AMINet Protocol The user data sent in the UDP packet follows our AMINet Ethernet protocol. AMINet was originally developed for use with our Ethernet Machine, which provides an Ethernet backbone for communication between Alcorn McBride Show Controllers. Now the same, easy to use protocol can be used to control the AM4.
UDP Message Layer The control source sends UDP Packets to the AM4. A UDP Packet contains information about the packet source (IP Address, Port number) as well as definable user data. The user data contains the entire AM4 Control Message including all AMINet specific bytes. These packets should be sent to the broadcast IP Address (0xFFFFFF) or the specific AM4 address with UDP port number 2639. Control Message Response The unit will normally send back a response to each Control Message it receives.
26 Controlling the AM-4
Scheduler Note: You can download the Schedule Builder program from www.alcorn.com which makes building schedules easy. The AM-4 Digital Audio Machine has a down-to-the-minute scheduler based upon its internal real time clock. At any time of day and date of year, the AM-4 Digital Audio Machine can start or stop playback of any file or play list, or do whatever it is supposed to at 3pm on January 15th 2009, for example. This functionality is built into a feature called the Scheduler.
Command Event Example 1: T:13:46 D:01/1/2010 E:Command 1:"1PL" Each event exists on one line and is made up of several fields. Example 1 shows the minimum number of fields you need to define an event, which are an Event, a Start Time, possibly a required data field, and a Start Date. Each field begins with a delimiter as shown in the following table: Delimiter Field T: Starting time (hh:mm) (military time – leading zeros for hours required) D: Starting date (mm/dd/yy or mm/dd/yyyy .
Example 2: T:14:46 D:01/1/2010 E:Command 1:"RJ" Two things have changed in this example. Start Time: 2:46pm in the afternoon (14:46 military) Start Date: January 1st 2010. (same as Example 1) Event: Command event (same as Example 1) Field 1, the string, defined as “RJ”, will cause the AM4 to stop playback. So using the two examples together in a schedule file will cause file number one to begin playback at 1:46PM on January 1st, 2010 and stop playback at 2:46PM the same day.
Fields in Detail There is a summary table in the File Format/Tutorial section that lists all the fields for your reference. Since the Command Event, and event Parameter fields have been discussed, we’ll discuss the rest of the fields here. T: Start Time The Start Time is the hour and minute your event becomes active. For most cases being active simple means gets executed. You specify it in military time 00:00 is midnight, 23:59, 11:59pm, is last minute of the day something can be scheduled.
D:01.01.2001 D:01/01/2001 D:01-1-2001 R: Repeat Number The Repeat Number acts in one of two ways: • With no Repeat Set field present. • With a Repeat Set field present: 1. With no Repeat Set field present: This is the most common usage of the Repeat Number. It acts as a multiplier of the Repeat Period. They should be read in conjunction like this: “Repeat this event every ”. Ex.“Repeat this event every 30 minutes”. The repeat number can be anywhere from 1 to over 4billion.
Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday Minute Hour Day Year Boot Notes: Month is not a valid period. If you want to make a monthly schedule, use a combination of repeat number, period and set to do so. See the example in the Repeat Number section for details. Examples: R:sunday R:year I: Repeat Set Using the Repeat Set field changes the way Repeat Number and Repeat Period operate. Together they act as an index into the Repeat Set.
Restrictions Since the Scheduler is very flexible, it is easier to explain what you cannot do, than to explain what you can. 1. When using BOOT as the Repeat Period, the Repeat Number can only be one. The unit does not keep track of the number of times hit has rebooted. You can put in other numbers, but it will ignore them. 2. Whatever combination you choose between Repeat Number and Repeat Period should not multiply out to be greater than a century. For example, don’t repeat an event every 102 years.
Double Occupancy Double Occupancy is when two events occupy the same time slot. If you plan on having a fairly complicated schedule, you may want to be sure you don’t have events competing with each other for execution when their time and date come around. This discussion looks at what happens when to events end up on the same time and date. It explains the rules used to determine which event wins.
Scheduler Rules Precedence: If two events occupy the same slot, this is the precedence: 1. StartTime Bootups take ultimate precedence during the bootup minute, and are treated as normal events afterwards ( if they repeat). 2. Repeating Bootups take second precedence during the bootup minute. 3. One-shots take precedence over Loops. 4. Finites take precedence over infinites during their period of execution. 5. Finites started on a later slot will take precedence over earlier finites. 6.
Schedule Builder Alcorn McBride provides Schedule Builder, a friendly GUI you can use to create your Schedules. Go to http://www.alcorn.com/support/software.html to download a copy today! You also should have read the previous section for a tutorial on how the engine works.
In the new event dialog box, set a start date and time by clicking the down arrows on those controls: If you have an end date and time, do the same for those fields. Choose the Event (the command) from the drop down menu. Here we have selected Play.
The next thing you can do is specify a Repeat frequency. Here, we have selected Every Day. Add a comment, if you like, telling us what this does: Press OK, and here is the resulting event: You can also select Edit:Edit Event to edit this entry with the dialog box or manually edit the events yourself .
You can then save the schedule and test it with the built in tester. Select File:Test Schedule. Press the Options button to set your simulation time. With this dialog box, you can set simulation time, start date and time, what to do on errors, etc…. Then press OK and press Run.
Uploading New Schedules to the AM-4 FTP schedule.new to immediately update your schedule. FTP schedule.scl to update your schedule at midnight like normal. 40 You can FTP shedule.scl to the AM-4, replacing your current version. (Delete the schedule.scl on the unit before FTP’ing this one.) The AM-4 has the current schedule in memory. At midnight, or after a fresh reboot, the new schedule.scl will get loaded into memory.
File Types and Storage The AM-4 Digital Audio Machine plays both MP3 encoded audio files and uncompressed WAV files. MP3 filenames have a “.MP3” extension and WAV files have a “.WAV” extension. Please refer to the Required File Name Formats section of this manual for details on file naming conventions. Supported WAV File Formats Note: GPS operation does not support the playback of WAV files.
Making MP3 Files Encoding Making MP3 files involves using an encoder, and you can find them readily available from the web. A couple that we have seen work well are Audio Catalyst, which is available from Xing Technology Corporation (www.xintech.com), and Music Match JukeBox available from MusicMatch (www.musicmatch.com). Fraunhofer IIS Institute in partnership with Thomson Multimedia own patents on tools that make MP3-compliant bitstreams.
Check www.alcorn.com for firmware updates to allow your AM-4 to use Compact Flash sizes greater than 2 Gigabyte. The AM-4 Digital Audio Machine can use most any ATA compatible Compact Flash media. There are some manufactures of ATA Compact Flash that Alcorn McBride has identified to be more compatible than others. For a complete list of preferred manufacturers, please visit the Knowledge Base on the Alcorn McBride website at http://www.alcorn.com/kb/index.html.
Getting Files Into The AM-4 You can either copy the files to the Compact Flash card externally, using a USB or other type of adaptor for your desktop or laptop computer, or if you have the Ethernet option installed you can FTP the files directly to your AM-4.
Copying Files Using an FTP Connection Note: This procedure applies only if your AM-4 is equipped with the optional Ethernet Module. Use a straight-thru Ethernet cable to connect to a network hub or switch. • Connect the AM-4 to an Ethernet network, or directly to a PC with an Ethernet jack and power-up the AM-4. • Use a crossover (Null) Ethernet cable for a direct connection to a PC. Use a serial terminal program or AMI Terminal to program the AM-4 to an unused IP address on your network.
Required File Name Formats IMPORTANT: The AM-4 file system does not support long file names. Avoid using any file name that has more then 8 characters followed by a 3 character extension. File names are represented in simple DOS 8.3 format. – in other words, an eight character name, a period, and then a three character extension. There are two ways to name your sound files. SND00003.MP3 is an example of a numbered file name. With this naming convention, you can use the parallel inputs to access files.
File Name Description SND00000.MP3 Track number 0 MP3 Audio file SND00004.WAV Track number 4 WAV Audio file PLY00002.LST Play List Number 2 BARKING.MP3 Track Name “BARKING” Audio file SHOW1.LST Play List Name “SHOW1” SCHEDULE.SCL The file used for real-time clock scheduled play. PLY00000.GPS GPS Playlist Number 0. Play List Files Play Lists provide a mechanism for the AM-4 Digital Audio Machine to automatically play a collection of tracks in a predefined sequence.
Special Play List Command Summary Special command characters further modify the behavior of the AM-4 Digital Audio Machine. These characters are: Char Meaning U Uninterruptible. Causes the AM-4 Digital Audio Machine to ignore the Resume input and serial Play command while playing. It still processes them when waiting or paused. I Interruptible. Allows the Resume input or serial Play command to skip to the next track. This is the power-up default. ^ Wait.
Random Playlists PLY00002.RND is an example of a Random Playlist filename. As an alternative, you can use the “Shuffle” command (SH) in an autoexec playlist to randomly play all the files on the media on power-up. The entries contained in a playlist file that has the extension .RND will be executed randomly. The playlist will never stop until a Stop command is issued to the unit.
Example Play List with BGM Mode Note: BGM operation is only available when using MP3 audio files. By using the BGM Playlist Mode you can cause the AM4 to pick up sound from where it left off between playing other sounds. This is useful if you want to step through a playlist using a serial or contact closure, playing spiels and then picking up a background track from where it left off before the spiels started. Below is an example of this type of playlist.
Power Up Operation When power is first applied to the AM-4 Digital Audio Machine, it briefly blinks the Status LED green. It then checks to see if a new firmware file exists, or if a track or Play List should be played, according to the following priority: Note: The Fault relay output will be closed on power-up indicating that power was lost. It will open as soon as a valid command is issued. • Check the Compact Flash card for a OS.NEW file. If found, the firmware is updated and the file is renamed to OS.
GPS Operation 52 GPS Operation
The AM-4 Digital Audio Machine can automatically trigger MP3 sounds whenever it enters into a predetermined geographical area. With this feature you can easily design a “No Operator-Intervention Required” audio system on a tour bus or tram that automatically plays pre-recorded spiels or sounds whenever it arrives or passes by a specified location. Enable the GPS mode of operation by turning DIP switch #4 ON (down). In GPS Mode, the AM-4 will not accept normal serial commands.
Program Description The program is set up much like a spreadsheet, with horizontal rows that represent specific tasks for the AM-4 to execute, and vertical columns that contain the various parameters associated with the particular task. Clicking the small buttons to the right of each cell will provide further help with that cell’s contents. The following explains each column in detail. Command The Command column contains the command to be executed at a particular Longitude and Latitude (if specified).
Play This is command normally associated with a specific geographical location and is executed when the Longitude and Latitude locations specified in the corresponding columns are matched. The Play command uses one Data column described here. Data1: The sound number of sound file name to be played. Data2: (Optional) The amount of time (in seconds) that the track will fade-in Data1 and Data2 The Data1 and Data2 columns are used to supply additional parameters to commands.
Tolerance can be changed at any time in the playlist. For example, you might want to tighten tolerance for a trigger that occurs while the vehicle is moving slower (or stopped), and need to open it up for when the vehicle is traveling faster. Map Display If an Internet connection is present, you can view the location of your GPS point on a map. Click on the map tab at the bottom of your screen. Put your cursor in the row of the latitude and longitude you wish to display. Click on the “Update Map” the map.
Connection Diagram In order for GPS Builder to detect latitude and longitude, a GPS sensor must be connected to a serial port. Below is a connection diagram for the GPS Kit that can be purchased from Alcorn McBride Inc. Program Operation The following is a step-by-step guide on how to use GPS Builder to make a playlist for the AM-4 operating in GPS Mode. Basically what we’re going to do is make a “boilerplate” playlist and then enter GPS points afterwards.
Step 6: Note: The satellite GPS signal will only work outdoors and not inside buildings or tunnels. The sensor needs “lineof-sight” to the sky in order to receive the satellite signals. Connect the GPS sensor (sometimes called a GPS Mouse) to your laptop. The program will begin detecting the GPS input stream and will display “GPS OK!” once detection has occurred. When the GPS sensor successfully locks onto the satellite signal, Longitude and Latitude values will begin to update in the windows on the left.
Operating the AM-4 with GPS Now that you have your playlist file with the GPS coordinates, you can use it in the AM-4. Here’s how. Make sure that the AM-4 GPS Mode DIP switch is ON. It’s DIP Switch #4, and it should be in the down position to turn it ON. Install the Compact Flash card that contains the playlist you prepared in the previous section. Make sure that it also contains all of the sounds referenced in the playlist.
Different Sounds, Same GPS Point If used, the “Set Background” command issued in the first playlist will remain in effect for subsequent playlists. As a result, background music will not be interrupted when changing playlists. The AM-4 GPS operates in Random mode, whereby you don’t need to travel around your programmed GPS coordinates in order for it to work. That means that you can go through the first trigger in the GPS playlist, and then skip to the fifth trigger for example.
Troubleshooting Guide / FAQ If you don’t find an answer to your question here, have a look at our Knowledge Base at http://www.alcorn.com/kb/index.html. We’re always updating it with new answers and useful information! Q: I’ve copied several files from my PC onto a Compact Flash card, but I can’t get a directory listing, either via the serial command or FTP. A: The Compact Flash card may have been pre-formatted in a way, which is incompatible with the AM-4’s operating system.
Q: Do you have a basic checklist I can go by in order to figure out what’s wrong? A: Here’s a checklist we have compiled of typical things you can check to make sure all the bases are covered: • Is the unit plugged in? (bear with us) • Does the unit have a Compact Flash card in it at all? (remove the front metal plate & check) • Is the Compact Flash card pressed in all the way? • Validate you’ve used the speaker cables/line level cables somewhere else successfully.
• Are you going in the correct direction for trigger(s)? The trigger will only occur when traveling in the programmed direction (unless the trigger contains no direction information, in which case it is omni-directional and will trigger in any direction.) • Is the LED blinking GREEN on the front of the AM-4? If not, 1. Check the DIP switch in the back of the unit. It should be set for GPS operation. 2. Verify that your GPS receiver (mouse) is connected. 3.
64 Troubleshooting Guide / FAQ
Mechanical Information Mechanical Dimensions Surface Mounting Mechanical Information 65
Surface Mount Kit, Part Number 230-100979 Qty 2 6 66 Part Number 306-100711 500-000566 Description Mounting Flange Screw, 6-32 x 3/8, Pan Head, Black Ox, SS Mechanical Information
Rack Mounting You can mount one or two AM-4 Digital Audio Machines in a 1U rack mount space.
Rack Mount Kit, 2 Unit, Part Number 302-100704 68 Mechanical Information
Specifications Audio DAC Resolution: Deviation from Linear phase: Total Harmonic Distortion: Dynamic Range (A-weighted): Inter-channel Isolation: Inter-channel Gain Mismatch: Frequency Response: Maximum Phase Non-Linearity: Line Out Level: Balanced Output (optional) Amplifier Output (optional) 16 bits +/-0.5dB 0.003% 94dB 90dB 0.1dB 10 to 20 Khz +/- 0.
Index A AMI Terminal, 18 AMINet, 24 Amplifier, 10 Audio Control, 21 autoexec, 15, 19, 47 B background, 51, 54, 55, 58, 61 background music, 61 Balanced, 3, 10, 70 baud, 18 BGM Playlist, 51 C checklist, 63 Checksum, 25 Command Bytes, 19–20, 21, 22, 23 Command Event, 29 comments, 19, 21, 22, 23 Comments, 19, 20, 34 Compact Flash, 2, 3, 4, 6, 7, 8, 11, 24, 34, 44, 45, 46, 52, 62, 63, 70 Connectors, 70 contact closures, 16, 17 Contact Closures, 12–14 F FAQ, 62 Fault, 7, 12, 17 File .MP3, 48 .
N noise, 8 Non-Linearity, 70 O Output Relay, 23, 51 P Parallel Control, 12 Parallel Outputs, 17 Parallel Port, 12 parity, 18 Pause, 12, 14, 18–20, 18, 20, 21, 49 Phase Non-Linearity, 70 Pioneer, 18–19, 21 Play, 18–62, 18–62 Play List, 48, 50, 51 Playing, 12–14, 17 PLC, 12, 17 Power, 10, 11, 70 Power Up, 15, 52 power-up, 19 protocol, 18–19 schedule.
