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Gentner Audio Perfect 400 Installation & Operation Manual

Audioconferencing system
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Audio Perfect™ 400
Audioconferencing System
Installation & Operations Manual
Perfect Communication through Technology, Service, and Education. ™

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Summary of Contents for Gentner Audio Perfect 400

  • Page 1 Audio Perfect™ 400 Audioconferencing System Installation & Operations Manual Perfect Communication through Technology, Service, and Education. ™...
  • Page 2 Gentner Part No. 800-150-101 November 1998 (Rev 2.0) © 1998 Gentner Communications Corporation. All Rights Reserved. Gentner Communications Corporation reserves specification privileges Information in this manual is subject to change without notice or obligation. Manual Development: Margaret Smith, Laurie Lingmann, Gerry Carpenter Artwork and Illustrations: Jim Wright, Don Semon The AP400 has been approved to CTR21 (exceptions - 4.6.2, 4.7.

  • Page 3: Table Of Contents

    able of Contents Introduction ......3 Unpacking ..........4 Warranty Registration .
  • Page 4 TABLE OF CONTENTS Operation ......40 Front Panel ..........40 Controlling Volume .

  • Page 5: Introduction

    RS232 connection. If you need technical help on how to install, set up or operate your AP400 system, please contact Gentner in any of the following ways: Telephone: 1.800.283.5936 (USA) or 1.801.974.3760 1.800.933.5107 (USA)

  • Page 6: Unpacking

    Figure 1. AP400 Unpacking Diagram Warranty Registration Please register your AP400 online by visiting Gentner Technical Support on the World Wide Web at http://www.gentner.com. When your product is properly registered, Gentner Communications will be able to serve you better should you require technical assistance or desire to receive upgrades, new product information, etc.

  • Page 7: Overview

    OVERVIEW • ABOUT THE AP400 Overview About the AP400 • Easy to install, simple to operate • Distributed Echo Cancellation™ technology on each mic/line input dramatically improves overall system performance, flexibility and setup • “Plug and play” capability for easy design, programming, installation and maintenance—no white noise set-up •...
  • Page 8 • Integrated touch-tone dialing for easy dialing through remote control • Gentner’s Digital Signal Processing technology ensures crystal-clear audio with the deepest, most reliable hybrid null • 8kHz sampling rate allows continual adaptation to telephone-line con- ditions •...

  • Page 9: Product Description

    OVERVIEW • PRODUCT DESCRIPTION Product Description The AP400 performs a variety of complex, integrated audio functions, all implemented using digital signal processors (DSPs). In the simplest terms, the AP400 is a microphone mixing matrix. As such, all micro- phone-mixing parameters can be customized and any input or combi- nation of inputs can be routed to any output.

  • Page 10: Front Panel

    OVERVIEW • PRODUCT DESCRIPTION Front Panel The AP400 front-panel LCD window and the push-button controls (Figure 2) enable you to view or modify current AP400 status and set- tings. The numbered items in Figure 2 correspond to the following descrip- tions.

  • Page 11: Back Panel

    OVERVIEW • PRODUCT DESCRIPTION 8. Inputs. This button displays the Inputs branch of the AP400’s LCD menu tree. 9. Outputs. This button displays the Outputs branch of the AP400’s LCD menu tree. 10. Routing. This button displays the Routing branch of the AP400’s LCD menu tree.
  • Page 12 Phoenix™ push-on connector(s). 6. G-Link In. This RJ45 connector is part of the AP400 RS485 local area network (LAN). The first Gentner unit in the G-Link network must be ter- minated in the G-LINK IN connector with a G-Link terminator. The first Gentner unit’s G-LINK OUT connector is then attached to the G-LINK IN...

  • Page 13: G-Link Networking

    The G-Link (RS485 LAN), gives you the ability to interconnect the AP400 with other Audio Perfect units (additional AP400s, AP10s, AP800s). The maximum distance between interconnected Gentner units is 20 feet. Gentner Communications recommends that category five twisted-pair (10BaseT LAN) cable be used. TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.975.3760...

  • Page 14: Installation

    INSTALL ATION • BEFORE YOU INSTALL Installation Before You Install The AP400 is designed to work in almost any acoustic environment. However, to maximize your audio quality, we recommend that you pre- pare your site by taking the following factors into consideration: Room Planning Before installing your AP400, we recommend that you carefully plan your installation to ensure that you achieve the best possible results.
  • Page 15 INSTALL ATION • BEFORE YOU INSTALL Figure 4. Room acoustics diagram Reverberation. Reverberation is the persistence of sound due to repeated reflections from walls, ceiling, floor, furniture and occupants in a room. Reverberation dissipates over a fixed period of time deter- mined by the room’s environment.

  • Page 16: Microphone Selection

    INSTALL ATION • BEFORE YOU INSTALL Microphone Selection The type of microphone you select can have a dramatic impact on the audio quality of your conference. In particular, the type of microphone used affects the voice pick-up pattern, audio level, and amount of noise introduced into the entire system.

  • Page 17: Microphone Placement

    INSTALL ATION • BEFORE YOU INSTALL Microphone Placement One of the most effective ways to minimize the problems encountered with audioconferencing is to position the speakers and microphones so that you achieve the maximum amount of acoustic isolation (isolation between loud speaker audio and microphone audio). This can be accomplished using unidirectional microphones and placing the loud speaker out of the optimum pickup area (Figure 5, facing page).

  • Page 18: Operational Requirements

    Network Requirements (Optional) The G-Link (RS485 LAN), gives you the ability to interconnect the AP400 with multiple Gentner units (additional AP400s, AP800s, or AP10s). The maximum distance between interconnected Gentner units is 20 feet. Gentner Communications recommends that category five twisted-pair (10BaseT LAN) cable be used.

  • Page 19: Equipment Interconnections

    INSTALL ATION • EQUIPMENT INTERCONNECTIONS Equipment Interconnections The following section provides step-by-step instructions for installing your AP400 system. Figure 7 (below) shows the back panel connec- tions of a fully-installed, single-unit AP400 system. Control System Microphone or PC (Optional) 5 W, 4 to 16 Ohm Telephone Speaker Connection External Power Amp...

  • Page 20: Step 1 - Complete Back Panel Connections

    INSTALL ATION • EQUIPMENT INTERCONNECTIONS 11 12 Figure 8. Back Panel Connections Step 1 — Complete Back Panel Connections The order in which you connect the cables is not important. The con- nections are discussed in the order they are numbered in figure 8, above.
  • Page 21 INSTALL ATION • EQUIPMENT INTERCONNECTIONS 6. & 7. G-Link Connections will be discussed on page 20. 8. RS232. Connect the RS232 port (right) to a free COM port of a PC or to a custom remote controller. The AP400’s baud rate as shipped from the factory is 9,600 (bps) baud.

  • Page 22: Step 2 - G-Link Connections (Optional)

    INSTALL ATION • EQUIPMENT INTERCONNECTIONS Step 2 — G-Link Connections (optional) If you want more than one Audio Perfect™ unit to function together as one system, the units will need to be connected to form a G-Link net- work. Place the AP400s (and other AP800s or AP10s) in the desired locations.

  • Page 23: Step 3 - Set Device Id On Each Unit

    DEVICE ID numbers for each AP400 on the network. As shipped from the factory, all AP400 units default as DEVICE ID “0”. Set DEVICE ID numbers for each Gentner unit at your site by manipulating the front- panel LCD. To set the DEVICE ID: 1.

  • Page 24: Step 4 - Set Mixer Mode

    INSTALL ATION • EQUIPMENT INTERCONNECTIONS Step 4 — Set Mixer Mode System 1 Once your physical G-Link network is established and unique G-Link AP400 (Device 0) Master-Linked DEVICE ID numbers for each AP400 on the network are established, G-Link the mixer mode must be set. There are three mixer-mode settings (see AP400 (Device 1) Slave Figure 11, left): master-single (default), master-linked, and slave.

  • Page 25: Lcd Programming

    INSTALL ATION • LCD PROGRAMMING LCD Programming For most installations, the default settings in the AP400 do not need to be changed; the system can be used as soon as power is applied. However, if you need to customize any settings, such as tele- phone connection options or unique routing requirements, you can do so though the front-panel user interface.
  • Page 26 To descend a menu level (go deeper into the tree), press ENTER. To ascend a menu level (go back toward the top of the tree), press ESC. Power-Up Screen Gentner AP400 Version 2.0 System Inputs...

  • Page 27: Security

    INSTALL ATION • LCD PROGRAMMING Adjusting a Value To adjust a parameter, first verify that it is flashing. If the parameter is not flashing, it cannot be adjusted. If the parameter is flashing, adjust the value with the buttons. As the value is adjusted, the parameter is updated immediately.

  • Page 28: System Parameters

    (See Figure 14): Select Preset, Lock Panel, Set Passcode, Device ID, Unit ID, Mixer Mode, Gate Parameters, RS232, and Telco. For default Power-Up Screen settings, see the programming worksheet (Figure 15, facing page). Gentner AP400 Items printed in boldface are the factory defaults. Version 2.0 SELECT PRESET...
  • Page 29 INSTALL ATION • LCD PROGRAMMING Figure 15. Default Porgramming Worksheet TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.975.3760...
  • Page 30 ON a microphone while still allowing people in the room to gate ON microphones as they speak. This mode can be turned on (default) or off by selecting the option and pressing ENTER. Gentner Communications recommends leaving this feature ON. Figure 16. PA Adaptive Mode diagram...
  • Page 31 INSTALL ATION • LCD PROGRAMMING Last Mic Mode. There are three modes of last-mic operation: last on, mic 1 and off. Last On leaves the last-activated microphone full ON until another microphone input is gated ON. Mic 1 allows the AP400 to revert back to a mic 1 input when all microphones gate off.
  • Page 32 INSTALL ATION • LCD PROGRAMMING Hold Time. This feature determines the length of time that a micro- phone remains ON after the microphone audio level drops below the gate ratio (Figure 19, below). Values range from 0. 1 –8.0 sec- onds in one-tenth of a second increments.
  • Page 33 INSTALL ATION • LCD PROGRAMMING Manual Ambient. This setting is relevant only if the adaptive ambi- ent mode is OFF on a mic channel (See Page 34). Best results are usually achieved when the adaptive ambient mode is ON. However, if you need to set the ambient level to a fixed value, turn OFF the adaptive ambient mode on the desired microphone channels.
  • Page 34 Meter LED "-10" and "Mic 4" flash green. If the error is caused by outgo- ing data, Meter LED "+12" flashes red; Meter LED"-10" and "Mic 3" flash RS232 green. Call Gentner Tech Support for help correcting this error. Baud Rate Flow Control Baud Rate.

  • Page 35: Input Parameters

    EQ Status, chairman mic, adaptive ambient, echo canceller, and NLP adjust. Power-Up Screen Gentner AP400 Gain Adjust. This adjusts the level for each gated input’s gain (rang- Version 2.0 ing between -20dB and 20dB). In conjunction with the LCD readout and the LED bar graph, all gated inputs can be simply calibrated for the right level on the mix bus.
  • Page 36 INSTALL ATION • LCD PROGRAMMING AGC. Each input can use automatic gain control (AGC). This fea- ture keeps softer and louder talkers at a consistent transmit level. This feature is disabled when shipped from the factory. The target gain is 0dB and adjusts at 2dB per second. The AGC start adjust- ment is +20dB, but will only adjust +6dB.
  • Page 37 Echo Canceller. Activate or deactivate the echo cancellation fea- ture for each gated input. Factory default is ON. Power-Up Screen Gentner AP400 NLP Adjust. Non-linear processing (NLP) has four settings: soft (6 Version 2.0 dB), medium (12dB), aggressive (18dB), and OFF. NLP adds addi- tional echo cancelling "horsepower"...

  • Page 38: Output Parameters

    Output Parameters Power-Up Screen There are two main submenus under the outputs menu tree: Output Gentner AP400 1–4, and Output A-D/Telco Out. The two main submenus all contain Version 2.0 the same menus at the next menu depth: gain adjust, mute and NOM (Figure 26, left).
  • Page 39 INSTALL ATION • LCD PROGRAMMING O u tp uts Out puts G-Lin k S ub Routing Matrix Setup bu s A B C D Telco From CODEC Receive Input A Input B Tape Play Input C Input D From Telco Receive Telco Receive Mic Inputs from other AP's G-Link X Bus...
  • Page 40 INSTALL ATION • LCD PROGRAMMING Echo Cancellation Setup EC Reference and PA. The EC reference tells the microphones which output will be used as the sample reference for echo cancellation. EC REF references Output D (typically used for connection to an external amp speaker).

  • Page 41: Meter Parameters

    ERL/TERL, ERLE/TERLE, and Default Meter (Figure 32). Power-Up Screen The first four submenus are all handled in the same way. Using the LCD, Gentner AP400 press the METER button, then scroll through the options (inputs, out- Version 2.0 puts, ERL/TERL and ERLE/TERLE) to specify which is to be metered by the front-panel LED meter.

  • Page 42: Operation

    OPERATION • FRONT PANEL Operation Front Panel A correctly installed AP400 virtually runs by itself. Typical operations involve changing volume of an output, muting an input or output, or handling calls on the connected telephone handset. For most installa- tions a custom remote control (optional) would be used. Controlling Volume When participating in a conference, you may find it necessary to increase or decrease the volume of a particular output.

  • Page 43: Answering A Call

    OPERATION • FRONT PANEL Muting or Unmuting Output 1. Determine the output you want to mute. 2. Press the OUTPUTS button, and scroll to the desired output channel. Press ENTER. 3. Scroll through the output parameters until you see MUTE. Press ENTER.

  • Page 44: Making A Call

    G-Link network and all AP products can be accessed and controlled through that single point. REMOTE CONTROL NOTE: You can perform the following actions through the custom controller: Gentner Communications • Turn AP400 telephone connection on or off recommends use of a cus- • Mute transmitted and received audio tom remote controller for user inter- •...

  • Page 45: Appendices

    APPENDICES • APPENDIX A: SPECIFICATIONS Appendices Appendix A: Specifications Dimensions (L x W x H) 17” x 1.75” x 8” 43.2cm x 4.5cm x 25.4cm Weight 7 lbs./3. 1 8 kg dry 12 lbs./5.4 kg shipping Connectors Power: Auto-adjusting power module; 100-240Vac; 50/60Hz;...
  • Page 46 APPENDICES • APPENDIX A: SPECIFICATIONS Mic/Line Inputs Connector: Removable Phoenix® block connector, -55 or 0dBu nominal, adjustable, balanced, bridging Impedance: 4kOhms Frequency Response: 20Hz to 15kHz ±2dB Phantom Power: 24Vdc input, selectable Noise: EIN 20Hz to 15kHz – 125dBu THD: <.03%* Line-Level Inputs Connector:...

  • Page 47: Appendix B: Warranty & Compliance

    Compliance Warranty Gentner Communications Corporation (Manufacturer) warrants that this product is free of defects in both materials and workmanship. Should any part of this equipment be defective, the Manufacturer agrees, at its option, to: A. Repair or replace any defective part free of charge (except transportation charges) for a period of one year from the date of the original purchase, provided the owner returns the equipment to the Manufacturer at the address set forth below.

  • Page 48: Fcc Part 15 Compliance

    Operation of this equipment in a residential area is likely to cause harm- ful interference, in which case the user will be required to correct the interference at his/her own expense. Changes or modifications not expressly approved by Gentner Communications Corporation could void the user's authority to operate the equipment.

  • Page 49: Ic Compliance

    APPENDICES • APPENDIX B: WARRANT Y & COMPLIANCE If you experience problems with this equipment, contact Gentner Communications Corporation, 1825 Research Way, Salt Lake City, Utah 84119, or by phone at (801) 975-7200 for repair and warranty informa- tion. If the trouble is causing harm to the telephone network, the tele- phone company may request you remove the equipment from the net- work until the problem is resolved.

  • Page 50: Babt Recording Requirements

    APPENDICES • APPENDIX B: WARRANT Y & COMPLIANCE BABT Recording Requirements This condition applies in circumstances where you wish to use telecommunications apparatus comprised in or connected to your system to record, silently monitor or intrude into live-speech telephone calls. (It does not apply where the apparatus in question is not telecommunications apparatus;...

  • Page 51: Appendix C: Connector Pinouts

    APPENDICES • APPENDIX C: CONNECTOR PINOUTS Appendix C: Connector Pinouts Table 1. RS232 COM DCE Port Pinout Pin Number Control Pin Number Control No connection Ground Table 2. Control/Status Port Pinout Pin Number User Definable* Status Momentary/Latching Default Description Lock front panel toggle Status of front panel lock Mute all mics toggle Status of mute all mics...

  • Page 52: Appendix D: Applications

    APPENDICES • APPENDIX D: APPLICATIONS Appendix D: Applications Audioconferencing/Videoconferencing As teleconferencing continues to grow, sophisticated equipment will make the difference between an average (or even frustrating) meeting and a high class, perfectly managed meeting. Executives at all levels appreciate the carefree ease of use that the AP400 provides for confer- encing.

  • Page 53: Distance Learning

    APPENDICES • APPENDIX D: APPLICATIONS Also commonly used in a teleconferencing scenario are Gentner’s Assistive Listening System (ALS) products: RX-1A Assistive Listening Receiver, RX-6 Assistive Listening Receiver, TX-37A Transmitter. For more information on these products, contact Gentner Communications at one of the numbers listed at the bottom of the page.

  • Page 54: Courtrooms

    AP400s, other equipment used in previously described conferencing applications is not necessary. If your courtroom application requires communication with an off-site location, the configuration diagrammed in Figure 33 (below) is a possible setup using Gentner equipment for multisite communication. Figure 33. AP400 Courtroom...

  • Page 55: Convention Center/Hotel Dividable Meeting Rooms

    APPENDICES • APPENDIX D: APPLICATIONS Convention Center/Hotel Dividable Meeting Rooms Gentner equipment supports meetings set up for panel discussions in conference centers and hotels. This type of meeting requires a different setup than that of a business meeting or distance-learning application.

  • Page 56: Appendix E: Accessories

    APPENDICES • APPENDIX E: ACCESSORIES Appendix E: Accessories Accessory Gentner Part Number AP800 910-150-001 AP10 Telephone Interface 910-150-201 Tabletop Omni Microphone 910-103-160 (with cable) Tabletop Uni Microphone 910-103-161 (with cable) Tabletop Omni Microphone 910-103-162 (black button)/910-103-163 (white button) Tabletop Uni Microphone...

  • Page 57: Command Syntax

    APPENDICES • APPENDIX F: SERIAL PORT COMMANDS Command Syntax All command lines in this manual are set off by the flag symbol "O". The serial command line that follows the "O" uses the following typographic conventions: <X> Parameters enclosed in "< >" indicate a mandatory parameter Parameters enclosed in "[ ]"...
  • Page 58 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS Table 3. AP400 Serial Commands Command Function Command Function Select/report Auto Answer for Telco port MDMODE Enable/disable modem mode AAMB Enable/disable adaptive ambient* Set/report three-band equalization* Select/report Auto Disconnect for Telco port MHP Enable/disable high-pass filter* Enable/disable AGC* MINIT...

  • Page 59: Serial Command Parameters And Explanations

    APPENDICES • APPENDIX F: SERIAL PORT COMMANDS Serial Command Parameters and Explanations The flag symbol "O" signals the start of a command line. For serial port command protocol and syntax, see page 55. This command activates and deactivates the auto answer feature. O [DEVICE] AA <X>...
  • Page 60 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command changes or reports back the state of the AGC for a microphone or line input. O [DEVICE] AGC <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified microphone channel CH= A-D Parameter to apply to the specified line input CH= *...
  • Page 61 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS CHAIRO This command changes or reports back the state of the chairman override for a microphone channel O [DEVICE] CHAIRO <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified microphone channel CH= * Parameter to apply command to all microphone channels <X>...
  • Page 62 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS DIAL This command generates DTMF tones. The capability remains active after the call is place so tones can be issued for use with voice mail and pagers. O [DEVICE] DIAL <STRING> Explanation <STRING> is any valid combination of touch tone characters. A comma indicates a two-second pause. STRING has a maximum length of 15 characters.
  • Page 63 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command changes or reports back the state of the equalizer for a microphone O [DEVICE] EQ <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified micrphone channel CH= * Parameter to apply command to all micrphone channels <X>...
  • Page 64 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS FPP (cont.) Explanation (cont.) button METER button INPUT button SYSTEM button OUTPUT button ROUTING button X=Null Parameter to return current passcode Return Values The command returns the current or updated condition of the front panel passcode. GAIN This command changes or reports back the input gain for a channel .
  • Page 65 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS GATE This command reports back the microphone gating status of an AP400. This command is read only. O [DEVICE] GATE Return Values The command will return the current status of microphone gating for a given unit with a hex value. Example The following command requests the gate status The following is returned out the serial port indicating...
  • Page 66 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS GRATIO This command changes or reports back the setting of the gate ratio. O [DEVICE] GRATIO <X> Explanation <X> X=0-50 Parameter to set the Gate Ratio (in dB) X=Null Parameter to return the current gate ratio Return Values The command will return the updated gate ratio (0–50) in the same format as the command.
  • Page 67 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command locks, unlocks, or returns the current state of the front panel from the serial port. O [DEVICE] LFP <X> Explanation <X> Parameter to unlock the front panel. Parameter to lock the front panel Parameter to toggle the state from one state to the other (regardless of current state) X=Null Parameter to return the current state of the front panel...
  • Page 68 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS MASTER This command selects or returns the current mode of the AP400 from the serial port. O [DEVICE] MASTER <X> Explanation <X> Parameter to designate the AP400 as master-single Parameter to designate the AP400 as slave Parameter to designate the AP400 as master-linked X=Null Parameter to return the current mode...
  • Page 69 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command changes or reports back the state of the high pass filter for a microphone. O [DEVICE] MHP <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified microphone channel CH= * Parameter to apply command to all microphone channels <X>...
  • Page 70 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS MMAX (cont.) Return Values The command will return the updated maximum number of microphones allowed on for the selected AP400 in the same format as the command. MPASS This command sets the current password for modem mode. Note: The default password is a carriage return (enter). If the pass- word is forgotten, it may be cleared back to a carriage return via the front panel.
  • Page 71 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS Example 1 The following command routes PREGATE MIC INPUT 1 audio to OUTPUT 1. This command applies to the box the serial cable connects to only since a device is not specified. Example 1. OUTPUTMIX matrix 16 15 14 13 12 11 10 #34 MTRX 18 1 Example 2...
  • Page 72 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command changes or reports back the state of the nonlinear processing for a microphone. O DEVICE] NLP <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified microphone channel CH= * Parameter to apply command to all microphone channels <X>...
  • Page 73 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS OFFA This command changes or reports back the setting of off attenuation. O [DEVICE] OFFA <X> Explanation <X> X=0-50 Parameter to set the amount of off attenuation (in dB) X=Null Parameter to return the current value of off attenuation Return Values The command will return the updated value of off attenuation in the same format as the command.
  • Page 74 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS PCMD (cont.) Explanation (cont.) <COMMAND> COMMAND=String Pin will execute string when actuated COMMAND=Null Parameter to return the current programming for the pin COMMAND=Clear Parameter to clear current programming (do nothing state) COMMAND LIST: AA, AD, AGC, CHAIRO, EQ, GAIN, GMODE, HOOK, LFP, MUTE, NULL, PRESET, TE Return Values The command will return the updated condition of the pin in the same format as the command.
  • Page 75 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS This command changes or reports back the state of the phantom power for a microphone. O [DEVICE] PP <CH> <X> Explanation <CH> CH= 1-4 Parameter to apply to the specified microphone channel CH= * Parameter to apply command to all microphone channels <X>...
  • Page 76 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS RING This command reports the presence of a Ring on the Telco port. (This is an indication only.) O [DEVICE] RING Return Value The Ring is sent if a valid ring has been sensed on the Telco line: [DEVICE] RING RXRD This command controls or reports the Receive Reduction control of the unit.
  • Page 77 APPENDICES • APPENDIX F: SERIAL PORT COMMANDS TERL This command reports back the telephone echo return loss (TERL) for the AP400 in decibels. O [DEVICE] TERL Example If the current TERL level is 10 dB, the following is returned out the serial port: [DEVICE] TERL 10 TERLE This command reports back the telephone echo return loss enhancement (TERLE) for the AP400 in decibels.

  • Page 78: Appendix G: Routing Matrix Worksheet

    O ut p ut s G-L ink S ub O ut p ut s Routing Matrix Setup b us A B C D Telco Input A Input B Input C Input D Telco Receive G-Link X Bus G-Link Y Bus G-Link Z Bus Sub-bus Mic / Line 1*...

  • Page 79: Appendix H: Programming Worksheet

    APPENDICES • APPENDIX H: PROGRAMMING WORKSHEET Appendix H: Programming Worksheet TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.975.3760...

  • Page 80: Appendix I: Block Diagram

    APPENDICES • APPENDIX I: BLOCK DIAGRAM Appendix I: Block Diagram 1.800.283.5936 (USA) OR 1.801.975.3760 TECHNICAL SUPPORT:...

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