Polycom EF1210 User Manual

CHOFREE

™ EF1210 M

ULTI

COUSTIC

CHO AND

ANCELLER

SER

-C

HANNEL

OISE

ANUAL

Copyright © 1999 ASPI Digital. All rights reserved. Printed in the United States of America. Because of technical progress, specifications are subject to change without notice. EchoFree is a trademark and ASPI is a registered trademark of ASPI Digital.

ASPI Digital - The Sound of DSP 1720 Peachtree Street NW, Suite 220 Atlanta, GA 30309-2439 (404) 892-3200 www.echofree.com

Technical Support: (404) 892-3200 help@aspi.com

EF1210UM-0100-99

EF1210 U

SER MANUAL

Introduction....................................................................................................3

Product Features.................................................................................................... 4

Quick Installation...........................................................................................6

Hardware Installation ............................................................................................ 6

Calibration.............................................................................................................. 6

EF1210 Calibration Quick Reference.................................................................... 8

Advanced Installation ....................................................................................10

Preparing for Installation....................................................................................... 10

EF1210 Front and Rear Panels..............................................................................12

Configuration.......................................................................................................... 15

Connecting the EF1210 to other equipment........................................................... 19

Calibration.............................................................................................................. 27

Calibrating With a Computer................................................................................. 28

Calibrating Without a Computer............................................................................ 28

Calibration Step 1: Calibrating Microphone Input Channels................................29

Calibration Step 2: Calibrating Zone Outputs....................................................... 30

Calibration Step 3: Calibrating AEC Reference Inputs.........................................32

Calibration Step 4: Calibrating for Playback and Record.....................................33

Calibration Step 5: Zone/Reference Setup............................................................. 34

Mounting the EF1210.............................................. ............................................... 36

Operating the EF1210....................................................................................38

Using the EF1210 Without RS-232 Control...........................................................38

Using the EF1210 With RS-232 Control................................................................39

Troubleshooting.............................................................................................42

No Output to Loudspeakers in Zone.......................................................................42

No Output to Remote End....................................................................................... 42

Residual Echo......................................................................................................... 44

Remote Control Problems.......................................................................................47

Contacting Technical Support................................................................................ 48

Technical Specifications................................................................................49

Compliance.............................................................................................................49

Warranty Information ....................................................................................51

EF1210 Command Set Reference..................................................................53

Command Syntax.................................................................................................... 53

Valid Commands and Messages............................................................................. 55

Default Values and Saved Parameter List.............................................................. 84

Applications...................................................................................................85

Distance Learning .................................................................................................. 85

Courtrooms............................................................................................................. 86

Further Assistance..................................................................................................86

EF1210 Block Diagram .................................................................................87

Connector Pinouts..........................................................................................88

Connecting Balanced Equipment to Unbalanced Equipment........................90

Connecting Unbalanced RCA to Balanced Mini Phoenix......................................90

Appendix A: EFPanel Control Software User Manual

About EFPanel Control Software ..................................................................A-3

Installing EFPanel.................................................................................................. A-3

Getting Started......................................................... ............................................... A-3

EFPanel Features for all EF Devices.................................................................... A-3

The EF1210 Options Page.............................................................................A-5

EF1210 U

SER MANUAL

RELIMINARY

Calibrating the EF1210 with EFPanel Control Software...............................A-7

Calibration Step 1: Calibrating Microphone Input Channels................................ A-7

Calibration Step 2: Calibrating Zone Outputs....................................................... A-9

Calibration Step 3: Calibrating AEC Reference Inputs.........................................A-11

Calibration Step 4: Calibrating for Playback and Record.....................................A-13

Calibration Step 5: Zone/Reference Setup............................................................. A-14

Save Setup Settings................................................................................................. A-15

EFPanel for the EF200 Phone Add................................................................A-17

Dialer...................................................................................................................... A-17

Phone Book............................................................................................................. A-18

EF200 Options........................................................................................................A-19

Technical Support: 404.892.3200

NTRODUCTION

Congratulations!

How to Use This Manual

Congratulations on your purchase of the EchoFree™ EF1210 Multi-Channel Acoustic Echo and Noise Canceller. By choosing AS PI Digital’s Ec hoFree™ products , you are investing in cutting edge DSP technology that will help provide the best po ssible audio quality for your system.

This manual is a reference manual for your EF1210. It is structured to provide the information you need quickly and conveniently. The following is an overview of each section:

• Quick Installation gives an overview of the installation process including an outline of hardware installation as well as calibration of the EF1210. It also includes a quick reference for calibration — use the quick reference only if you are very familiar with the EF1210 since it is just an outline of steps without detailed explanations.

• Advanced Installation gives more detailed technical information on the installation, configuration and calibration of the EF1210.

• Operating the EF1210 outlines using the EF1210 with and without RS-23 2 control.

• Troubleshooting helps to debug problems with installation.

• Technical Specifications provides the technical specifications of the EF1210.

• Warranty Information

• EF1210 Command Set Reference contains instructions on how to send RS-232

commands to the EF1210 as well as a reference of the RS-232 commands.

• Applications briefly describes using the EF1210 in different applications.

• EF1210 Block Diagram

• Connector Pinouts

• Connecting Balanced Equipment to Unbalanced Equipment

Product Descripti on

ASPI Digital -

The Sound of DSP

The EF1210 Multi-Channel Acoustic Echo and Noise Canceller installs between the room’s microphones and the automatic mixing system, providing individual channel noise cancellation and acoustic echo cancellation. The EF1210 works with most vendors’ automixing systems to provide conferencing capability to new and existing rooms.

Unlike most echo cancellers, the EF1210 requires no training sequence to learn a room’s echo response. After the unit has been installed, all you have to do is turn it on. No further adjustments are required. ASPI’s echo cancellation algorithm offers speed, flexibility and superior audio quality to your conference room setup.

The speed at which an echo canceller matches the actual sound of a room (the convergence rate) is a direct indication of the product’s quality. Faster convergence allows better conference quality by instantly adapting to chan ging room environments such as moving microphones, changing volumes or people moving around the room. Our echo cancellers are designed to provide faster convergence and better performance than other echo cancellers. This means that the EF1210 adapts to changes in room acoustics during conversations quickly for consistent performance throughout the

Technical Support: 404.892.3200 3

EF1210 U

conversation. At a convergence rate of 30 dB per second, ASPI echo cancellers are the fastest on the market.

Because the EF1210 supports a wider range of acoustic gain than most echo cancellers, it offers greater flexibility in loudspeaker and microphone placem ent. Most echo cancellers can only operate properly at less than 0 dB of acoustic gain. Breaking through this threshold can cause echoes and howli ng as loudspeak er levels overpower the microphones. Th at can leav e you with f ew options when desig ning audi o or vide o conference rooms. A wider range of acoustic gain results in a smaller danger zone, allowing the Systems Designer greater flexibility when placing loudspeakers and microphones or setting volume levels.

ASPI’s superior audio quality allows all parties to communicate freely and naturally, without echoes, switching noises, clipping of words, or dropout of speech. A patented state-logic algorithm ensures smooth and natural communications without typical speakerphone performance problems.

ASPI’s proprietary noise cancellation on each of the inp uts helps to keep overall noise to a minimum. ASPI echo cancellers are the only ones on the market to feature this patent pending technology. Noise cancellation filters out ambient background noise such as HVAC, LCD projectors, and road noise. Our noise cancellation technology is not a noise gate. It actually removes noise. Therefore, it enhances the operation and improves the sound quality of an automixer, for example, by pre venting it from bringing the noise level up and down when microphones are gated on and off. By cancelling the noise picked up by each microphone, the overall SNR is preserved. The result is crystal clear speech over a greater decibel range than any other echo canceller. That means reduced listener fatigue and a higher quality audio conference.

SER MANUAL

Warranty Registration

RODUCT FEATURES

The EF1210 is also fully RS-232 controllable via all popular room control systems, and provides links to other ASPI products, such as the EF200 Phone Add.

Please take a moment to fill out and return your warranty registration card. This information will help us to provide you with better customer support.

• 8 microphone/line level inputs

• Phantom power on each input

• Ambient noise cancellation (patent pending) on each input

• Fast convergence rate of 30 dB/sec

• Works in environments with up to 10 dB of room gain

• Links to other ASPI devices such as EF200 Phone Add

• Compatible with most matrix and automixers

• Fully RS-232 controllable via room controllers

• Front panel lock-out capability

• Can be used as a wideband noise cancell er (20 kHz band width) when AEC i s disabled

• Long “Tail Time” supports even the most difficult of rooms (200 ms)

• Supports up to two AEC reference input signals

• Supports record and playback

• Ability to store user configurations in non-volatile memory

• Digitally controlled analog trimpots

• Phoenix connectors for audio input and output

• Single rack unit width and height

NTRODUCTION

• Pink noise generator for calibration mode

• 2 year warranty

ASPI Digital -

The Sound of DSP

Technical Support: 404.892.3200 5

UICK INSTALLATION

ARDWARE INSTALLATION

EF1210 U

Installation of the EF1210 involves two procedures: hardware installation, and calibration.

Hardware installation involves the following steps:

1. Set rear panel DIP switches to select Line or Mic level and enable phantom power for each microphone input channel, and to select ASPI Bus Device ID if necessary. See “Configuration” on page 15.

2. Connect input and output signals (See “Connecting the EF1210 to other equipment” on page 19):

• Connect the 8 Mic/Line Inputs to microphones.

• Connect the 8 Line Outputs to the inputs of a mixer.

• Turn off Phantom Power on automixer.

• Connect Zone Output(s) to amplifier(s) or powered loudspeaker(s).

• Connect AEC Reference Inputs to the T

output of a CODEC.

• If you wish to use the EF1210’s bu ilt in P layback/ Record mixer feature, con-

nect A Record” on page 22.

3. If you are using an RS232 remote control device, connect it to the RS-232 R

EMOTE CONTROL

them using the ASPI Bus ports (See “Connecting the ASPI Bus” on page 26).

4. Connect the external power supply.

, AUX IN, TO CODEC, and REC as directed in “Playback/

MIX IN

port; if you are controlling multiple ASPI devices, connect

AEC output of an EF200 or to the

SER MANUAL

ALIBRATION

Caution!

Calibration of the EF1210 involves a sequence of five calibration steps to configure the input and output levels of the EF1210 to match those of the equipment to which it is connected. The EF1210 can be calibrated either from the front panel or by using a computer. Please refer to “Calibration” on page 27 for more detailed information on the Calibration procedure. Correct calibration is essential for satisfactory operation of the EF1210, so please take the time to familiarize yourself with the details of the Calibration procedure by reading “Calibrati on” on page 27.

For front panel calibration, enter Calibration mode by pressing and holding the A I

N LEVEL/SETUP

mode, the S executing. Press the A to the next. When you have finished Calibration step 5, press the A

button again to exit Calibration mode; any changes that you made will be

ETUP

saved as the default power-on settings when you exit the Calibration procedure.

The EF1210 is designed to maintain a 1/4” (6.35 mm) air circulation clearance above the enclosure. Do not stack or install

EF1210s in such a way as to defeat this clearance, block the side vent holes, or otherwise impe de air circulation around the EF1210.

and I

NPUT SELECT

LED will blink to let you know which setup step you are currently

ETUP

UX IN LEVEL/SETUP

front panel buttons for 2 seconds. In Calibration

button to move from one Calibration step

UX IN LEVEL

UICK INSTALLATION

If you miss a Calibration step or lose your place and get to the wrong C alibration step, you may either continue and come back to the missed step later or exit Calibration mode (by pressing A

UX IN LEVEL/SETUP

repeatedly until the S

LED is no longer

ETUP

illuminated), re-enter Calibration mode, and resume Calibrat ion at the step that you missed. If you wi sh t o ex it Cal ibration mode and discard any changes that you made, you must cycle power on the EF1210 before exiting Calibration mode.

ASPI Digital -

The Sound of DSP

Technical Support: 404.892.3200 7

EF1210 U

SER MANUAL

EF1210 C

Legend:

ALIBRATION QUICK REFERENCE

LED Off LED On Button

LED Blinking

Calibration Step 1: Calibrating Microphone Input Channels

1.1. Press and hold the AUX IN LEVEL/SETUP and the INPUT SELECT buttons for 2 seconds to enter setup. SETUP LED blinks once per period.

1.2. Press REF SELECT to select noise output source.

1.3. Press INPUT SELECT to select input channel to calibrate.

1.4. Place SPL meter beside mic pointing in the same direction. Adjust loudspeaker for 73 dB SPL at mic (for boundary mics) or refer to Table 4 in Calibration Section for other mic types.

1.5. Press LEVEL ADJUST until first yellow LED (0 dB) on INPUT meter is lit on INPUT meter.

1.6. Repeat steps 3-5 for each input channel. Be sure to move SPL meter or mics so each mic sees the appropriate SPL level.

: adjust

reen

MUTE

ALL

INPUTPOWER REMOTE

-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20

STEP 1.5

level until 3

and 1 yellow LEDs

are lit (repeat for

each channel)

STEP 1.1

hold AUX IN LEVEL/

SETUP button

INPUT SELECT for 2

seconds to enter

confi

LEVEL

ADJUST

: Press and

and

uration mode

AUX IN

LEVEL

SETUP

STEP 1.2

select noise source

REF

SELECT

Calibration Step 2: Calibrating Zone Outputs, Check Acoustic Gain

STEP 1.3

press to select

channel for

calibration

INPUT

SELECT

: press to

LED blinks

once for

microphone

calibration

AECAAEC

SETUP

LEDs light to

indicate which

channel is selected

12345678

pink noise to both zones no noise

enerated

pink noise to zone A pink noise to zone B

noise level

measured

at mic

should be

73 dB SPL,

or refer to

Table 4

2.1. Press the AUX IN LEVEL/SETUP button to enter Zone Output Calibration. SETUP LED blinks twice per period.

2.2. Press REF SELECT to select noise output source (we recommend using both zones simultaneously).

2.3. Select nominal output level for your room audio amplifier with LEVEL ADJUST (press UP for 0 dBu, DOWN for -10dBV).

2.4. Repeat for other Zone output if appropriate. Then return all mics to their operating position and orientation.

2.5. Check acoustic gain limit. Adjust external amplifiers/loudspeakers so that the loudspeaker volume is almost uncomfortably loud OR no more than 3 green LEDs are lit on INPUT meter.

2.6. Press INPUT SELECT to select next input channel.

2.7. If INPUT meter shows more than 3 green LEDs, turn down room amplifier.

2.8. Repeat steps 6 & 7 for each input channel.

INPUTPOWER REMOTE

-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20

STEP 2.7

amplifiers/loudspeakers so that no more than 3

: adjust external

lit (repeat for each channel)

reen LEDs are

MUTE

ALL

STEP 2.3a

: press

if amp expects consumer level input (-10 dBV)

LEVEL

ADJUST

STEP 2.3b

if amp

press

expects 0 dBu

balanced input

STEP 2.6

to select channel;

AUX IN

REF

LEVEL

SELECT

SETUP

STEP 2.2

press to select

noise source

: press

check level

INPUT

SELECT

LED blinks

twice for Zone

calibration

AECAAEC

SETUP

channel is selected

12345678

noise to both zones (recommended) noise to zone A noise to zone B

LEDs light to

indicate which

UICK INSTALLATION

Calibration Step 3: Calibrating AEC Reference Input

3.1. Press AUX IN LEVEL/SETUP button again to enter Ref Input calibration. The SETUP LED blinks 3 times per period.

3.2. Press REF SELECT to select input source (AEC A or AEC B). Single zone installation will use AEC A.

3.3. Establish live connection to remote site(s) and have remote party talk normally.

3.4. Press LEVEL ADJUST until first yellow LED on REMOTE meter is flickering regularly and 2nd yellow is flickering rarely.

3.5. Repeat for other reference input if neccessary.

LED blinks three

times for AEC

Reference calibration

INPUTPOWER REMOTE

-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20

STEP 3.4

level until person

talking at remote site flickers second

MUTE

ALL

: adjust

yellow LED

LEVEL

ADJUST

AUX IN

REF

LEVEL

SELECT

SETUP

STEP 3.2

: press

to select

reference input

source

INPUT

SELECT

SETUP

AECAAEC

12345678

AEC A input selected AEC B input selected

Calibration Step 4: Calibrating for Playback and Record

4.1. Press the AUX IN LEVEL/SETUP button to enter Playback/Record calibration. The SETUP LED blinks 4 times per period. This step may be omitted if you are not using the internal EF1210 mixers to implement playback and record.

4.2. Press LEVEL ADJUST DOWN to set CODEC OUT level to -10 dBV, press LEVEL ADJUST UP to set CODEC OUT level to 0 dBu.

INPUTPOWER REMOTE

-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20

press Ð to set

CODEC OUT

MUTE

ALL

STEP 4.2a

level to -10

dBV

LEVEL

ADJUST

STEP 4.2b

press Ï to set

CODEC OUT level to 0 dBu

AUX IN

REF

SELECT

INPUT

SELECT

LED blinks four times for record

LEVEL

SETUP

AECAAEC

SETUP

and playback

calibration

12345678

Calibration Step 5: Zone/Reference Setup

5.1. Press the AUX IN LEVEL/SETUP button to enter Zone/Reference Setup. The SETUP LED blinks 5 times per period. This step may be omitted for single zone installations.

5.2. Use INPUT SELECT to cycle through each input channel. Use REF SELECT to select corresponding reference input for each input channel.

INPUTPOWER REMOTE

-12 -7 -3 0 3 20 dB -12 -7 -3 0 3 20

MUTE

ALL

LEVEL

ADJUST

STEP 5.2a

: press to

select channel for

calibration

AUX IN

REF

SELECT

: press to

INPUT

SELECT

LEVEL

SETUP

STEP 5.2b

select reference zone

LED blinks

five times for

zone/ref setup

AECAAEC

SETUP

LEDs light to

indicate which

channel is selected

12345678

zone A selected zone B selected

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 9

DVANCED INSTALLATION

The installation procedure for the EF1210 consists of the following steps:

1. Prepare for installation (below).

2. Configure the DIP switches to accept appropriate levels from microphones or mixer (See “Configuration” on page 15).

3. Connect the EF1210 to other equipment (See “Connecting the EF1210 to other equipment” on page 19).

4. Calibrate the EF1210 (See “Calibration” on page 27).

REPARING FOR INSTALLATION

Reading the entire manual (or at least the advanced installation section) before beginning the installation process will he lp you be more prepared for installation. Also, please make sure you have the correct equipment (outlined below) before you begin installation.

EF1210 U

SER MANUAL

What’s Included

What’s Not Included

Tools Needed

The EF1210 product package includes the following items:

• EF1210 User Manual (this manual)

• EF1210 MultiChannel Acoustic Echo and Noise Canceller

• External Power Supply with a cable clamp for strain relief

• Diskette with EFPanel Control Software

• Warranty R egistration Card

The following equipment is not included with the EF1210 product package, but may be necessary to create a completely functional system:

• Microphones

• Loudspeakers

• Audio amplifier (or amplified loudspeaker)

• EchoFree™

• Automatic microphone mixer or matrix mixer

• Audio cables

• Videoconferencing CODEC or other four-wire interface (optional)

• RS-232 remote control device (optional)

• Sound Level Meter (SPL meter)

• Screwdriver to mount EF1210 in your rack

EF200 Phone Add (see Note below)

DVANCED INSTALLATION

Note.

The EchoFree™

EF200 Phone Add provides a full duplex inter-

face between a four-wire audio system and a two-wire telephone line. It allows a telephone caller to be brought in to any four-wire audio system. The EF200 is similar to a digital hybrid, but with many more features and capabilities. The primary fu nction of the EF200 is the line echo canceller (LEC), which digitally eliminates reflections from the telephone hybrid. The EF200 is the recommended Phone Add for any application.

ASPI Digital -

The Sound of DSP

Technical Support: 404.892.3200 11

EF1210 U

SER MANUAL

EF1210 F

RONT AND REAR PANELS

S O U N D O F D S

T H E

POWER

INPUT REMOTE

-12 -7 -3 0 3 20 -12 -7 -3 0 3 20dB

1 2 3 4 5 6 7 8 9 10 11 12

HANTOM

ESERVEDRESERVED

ASPI BUS IN

PIN 2: TXD

ASPI BUS OUT

3: RXD

REMOTE CONTROLREMOTE CONTROL

RS-232

ID 8

ID 4

ID 2

ID 1

ID 16

EVICE

5-8

HANTOM

INELINELINELINELINE

13 14 15 16 18 19 20 21 22 23 24 25 26 27 2817

MUTE

ALL

Figure 1. EF1210 Front and Rear Panels

1. P

2. I

3. R

4. M

5. L

6. A

7. R

8. I

9. S

10. AEC A LED. During normal operation, this LED indicates if reference input A

11. AEC B LED. During normal operation, this LED indicates if reference input B

12. I

13. D

CHOFREE

INPUT

REF

AUX IN

SELECT

LEVEL ADJUST

5, 15 VDC 5, 15 VDC

436587

OWER INDICATOR

MIC/LINE INPUTS

LEVEL

SETUP

AEC REF

AUXINAMIX

. When the LED is green, power is on.

NPUT SIGNAL LEVEL INDICATOR

mic input signals (selected by I

EMOTE SIGNAL LEVEL INDICATOR

reference signals (selected by R

UTE ALL

LED. This LED is only ON when all 8 L

AEC A AEC B 12345678

SETUP

AEC BAEC A 21436587 REC

INPUT CHANNELS

LINE OUTPUTS

. Indicates level activity on any one of the 8

NPUT SELECT

button).

. Indicates level activity on either of the two

EF SELECT

button).

EF1210

ZONE

CODEC

INE OUTPUT

channels are

muted. If only some of the channels are muted, the LED will not be ON.

EVEL ADJUST

. Adjusts digital trimpot levels for the 8 microphone inputs, 2 reference inputs, 2 zone outputs, CODEC output, and Aux input (used in conjunction with the A

UX IN LEVEL/SETUP

. Press and hold both this button and the I

button).

NPUT SELECT

button for 2 seconds to put the EF1210 into configuration mode. Pressing the A

UX IN LEVEL/SETUP

calibration process. During normal operation, press and hold the A

button and use the L

ETUP

button again selects between configuration modes in the

UX IN LEVEL

EVEL ADJUST

buttons to adjust the playback leve l of

your program audio device.

EF SELECT BUTTON

ence input (AEC A or AEC B) is shown on the R

. During norma l operation, this button selects which refer-

EMOTE LEVEL INDICATOR

. Dur-

ing setup, it has different functions depending on the setup step.

NPUT SELECT BUTTON

of the 8 M

input channels is shown on the I

(LED meter). It is also used with the A

. During normal operation, this button selects which one

NPUT SIGNAL LEVEL INDICATOR

UX IN LEVEL/SETUP

button to enter se tu p

mode. During setup, it has different functions depending on the setup step.

LED. Flashes to indicate the current setup step. This LED is OFF during

ETUP

normal operation.

(AEC A) is selected for display on the R

EMOTE LEVEL INDICATOR

. During

setup, it has different functions depending on the setup step.

(AEC B) is selected for display on the R

EMOTE LEVEL INDICATOR

. During setup,

it has different f unctions depending on the setup st ep.

NPUT CHANNEL

input channel is selected for display on the I

LEDS. During normal operation, these LEDs indicate which

NPUT LEVEL INDICATOR

. During

setup, it has different functions depending on the setup step.

IP SWITCHES

. Select mic or line level inputs, phantom power, and ASPI Bus

ID.

DVANCED INSTALLATION

14. ASPI BUS IN. Connects to the ASPI BUS OUT of another ASPI Digital device.

15. ASPI B

US OUT

16. RS-232 R

. Connects to the ASPI BUS IN of another ASPI Digital device.

EMOTE CONTROL PORT

. Connect this to an optional RS-232 remote

control device, such as a touch panel or personal computer COM port.

17. T

HREADED HOLE FOR POWER SUPPLY CABLE CLAMP

. Use the provided cable clamp to clamp the power supply cable to the back panel of the EF1210 for str ain relief.

18. P

OWER SUPPLY INPUT

. Connects to the external power supply provided with the

EF1210.

Caution!

Use only the power supply provided with the EF1210. Use of other power supplies will void the warranty and may

cause damage.

19. M

IC/LINE INPUTS

. Connects to microphone at either mic or line level, with or

without phantom power (both selectable with DIP switches).

20. A AEC A and is output to R

. Connects to the output of the automixer. This is internally mixed with

MIX IN

. This is only needed when recording from the

EF1210. See “Playback/Record” on page 22 for a description of the Record and Playback mixer circuitry. See also ‘T

21. A

Note.

UX IN

must be a 0 dBu signal.

MIX IN

. Connects to the output of a tape recorder, VCR, or other recording

CODEC” (number 26).

device. Playback from a program audio device is only available with the Reference A input signal. See “Playback/Record” on page 22 for a description of the Record and Playback mixer circuitry.

22. AEC A R

EF INPUT

. Connect to the output of a CODEC or hybrid connected to

Zone A.

23. AEC B R

EF INPUT

. Connect to the output of a CODEC or a hybrid connected to

Zone B.

24. L

INE OUTPUTS

. Connect to the inputs of an automixer or matrix mixer.

Caution!

25. R

. Connects to a recording device. REC requires taking the output from the

Set mixer inputs to 0 dBu line level, phantom power OFF.

automixer (or an output of a matrix mixer) and plugging that back into the EF1210 so that the local side of the conference can be recorded. See “Playback/ Record” on page 22 for a description of the R ecord and Playback mixer circuitry.

26. T

O CODEC

plugged in to A

. Connects to the CODEC. When the output of the automixer is

MIX IN

, the TO C

signal is a mix of the A

ODEC

MIX IN

and AUX IN signals. This is only needed when you want to add a Playback signal to the automixer output before it is sent to the C ODEC. See “Pla yback/R ecor d” on page 22 for a description of the Record and Playback mixer circuitry.

27. Z

28. Z

A. Connects to an audio amplifier or powered loudspeaker in Zone A.

ONE

B. Connects to an audio amplifier or powered loudspeaker in Zone B

ONE

(optional).

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 13

EF1210 U

SER MANUAL

How to Get Useful Information from the Signal Level Meters

When configuring the EF1210, it is very important to know which signal level meter to look at. On the front panel, there are two signal level meters — the I level meter and the R (microphones 1-8), use th e I inputs (AEC A and AEC B), use the R

signal level meter. When configuring the input channels

EMOTE

signal level meter. When configuring the reference

NPUT

signal level meter.

EMOTE

NPUT

signal

Take note that unlike a microphone mixer, the signal level meters do not show a total output signal, meaning the EF1210 does not add up, for example, all eight input signal levels and show them on the I

signal level meter. Instead, what is shown on

NPUT

the signal level meters is the individual signal level of the inpu t channel or reference. To display the desired input or reference signal when the EF1210 is in normal opera-

tion (not setup mode), press the appropriate S

button. Push the REF S

ELECT

button to cycle through the two reference inputs. Push the I

NPUT SELECT

button to

ELECT

cycle through the eight input channels. Use the LEDs on the right side of the front panel as an indicator of which level is displayed on the LED meter. The input channels are indicated by the LEDs labeled C

HANNELS

1-8. Reference inputs are indicated

by the AEC A or AEC B LED. If you do not see activity on the signal level meter while a talker is talking, do not

immediately assume that the level needs to be turned up. First check to make sure you are looking at the correct input or reference on the signal level meter.

DVANCED INSTALLATION

ONFIGURATION

Configure the DIP Switches

ID 8

ID 4

ID 2

ID 1

HANTOM

INELINELINELINELINE

HANTOM

5-8

HANTOM

ESERVEDRESERVED

HANTOM

ID 16

EVICE

Figure 2. DIP Switches on EF1210 Back Panel

Note.

1 M 2 P 3 M 4 P 5 M 6 P 7 M 8 P 9 M

10 P

WITCH

When the DIP switch is down (as shown in the diagram in Figure

2), it is in the OFF position. When the DIP switch is up, it is in the ON position. The default factory setting for all switches is OFF.

The following is a description of each DIP switch and its function.

ABEL

1/L

HANTOM

2/L

HANTOM

3/L

HANTOM

4/L

HANTOM

5-8/L

INE

1 Sets phantom power for microphone 1. See Caution below.

INE

2 Sets phantom power for microphone 2. See Caution below.

INE

3 Set phantom power for microphone 3. See Caution below.

INE

4 Sets phantom power for microphone 4. See Caution below.

INE

UNCTION

Sets mic or line level for input 1 on the EF1210

Sets mic or line level for input 2 on the EF1210.

Sets mic or line level for input 3 on the EF1210.

Sets mic or line level for input 4 on the EF1210.

Sets microphones 5-8 as a group to accept mic or line level input. This permits any combination of mic and line level inputs by careful selection when connecting cables to inputs. Switch 9 in Line position allows 0-4 microphone inputs; switch 9 in Mic position allows 4-8 microphone inputs.

HANTOM

5 Sets phantom power for microphone 5. See Caution below.

Table 1: DIP Switch configuration

ASPI Digital -

The Sound of DSP

Technical Support: 404.892.3200 15

EF1210 U

SER MANUAL

WITCH

11 P 12 P 13 P 14 R 15 R 16 D 17 D 18 D 19 D 20 D

ABEL

HANTOM HANTOM HANTOM

ESERVED ESERVED EVICE EVICE EVICE EVICE EVICE

6 Sets phantom power for microphone 6. See Caution below. 7 Sets phantom power for microphone 7. See Caution below. 8 Sets phantom power for microphone 8. See Caution below.

ID 16 See Table 2 on page 17 ID 8 See Table 2 on page 17 ID 4 See Table 2 on page 17 ID 2 See Table 2 on page 17 ID 1 See Table 2 on page 17

Table 1: DIP Switch configuration

UNCTION

Reserved and must always be set to the OFF position Reserved and must always be set to the OFF position

Caution!

Phantom power should be turned OFF unless you are using a microphone that requires phantom power.

DVANCED INSTALLATION

Device ID

Device ID Switch 16

0 (default) 1 ON 2ON 3ONON 4ON 5ONON 6ONON 7ONONON 8ON 9ON ON 10 ON ON 11 ON ON ON 12 ON ON 13 ON ON ON 14 ON ON ON 15 ON ON ON ON 16 ON 17 ON ON 18 ON ON 19 ON ON ON 20 ON ON 21 ON ON ON

These switches set the Device ID for the EF1210. The ID can be any number from 0 to 31. It is a five bit binary number, with the least significant bit on switch 20. The number after the “Device ID” label denotes the binary value of the switch. Table 2 lists the DIP switch positions necessary to set each Device ID number from 0 to 31.

The Device ID is the same ID that is used with the EF1210 Command Set. The EF1210 will respond only to commands that are sent with the same Device ID as the one set on its switches. If you set the Device ID to one that doesn’t agree with your remote control commands, the remote control will no longer affect that particular EF1210.

If you are not using a remote control device (via RS-232 o r the ASPI Bus), the Device ID settings do not matter. The default Device ID is 0.

Table 2: DIP Switch Positions for EF1210 Device IDs (Blank spaces mean switch is OFF)

(Device ID 16)

Switch 17 (Device ID 8)

Switch 18 (Device ID 4)

Switch 19 (Device ID 2)

Switch 20 (Device ID 1)

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 17

EF1210 U

SER MANUAL

Device ID Switch 16

(Device ID 16)

22 ON ON ON 23 ON ON ON ON 24 ON ON 25 ON ON ON 26 ON ON ON 27 ON ON ON ON 28 ON ON ON 29 ON ON ON ON 30 ON ON ON ON 31 ON ON ON ON ON

Switch 17 (Device ID 8)

Switch 18 (Device ID 4)

Switch 19 (Device ID 2)

Switch 20 (Device ID 1)

DVANCED INSTALLATION

ONNECTING THE

Overview

EF1210 TO

OTHER EQUIPMENT

Each AEC input channel must be associated with 4 signals: local input, local output, remote input and remote output. The local input can either be a microphone or line level input. Since the inputs are typically connected to microphones, the inputs will be referred to as microphone inputs in this manual. The local output is the zon e out-

ONE

A or Z

put (Z the remote output is the L

Caution!

B). Remote input is the reference input (AEC A or AEC B) and

ONE

INE OUTPUT

Set mixer inputs to 0 dBu line level, phantom power OFF.

ZONE A AEC A

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

CH 8

EF1210

OUT 1

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

OUT 8

Auto

Mixer

TO AEC

(Optional)

FROM AEC

EF200

FROM

REMOTE

CODEC

Figure 3. Single room using an EF1210 (single zone).

PSTN

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 19

EF1210 U

SER MANUAL

Zoning

The EF1210 may be configured to work with a single AEC reference input or with two distinct AEC reference inputs. If a single reference is used, the two zone outputs (Zone A and Zone B) will carry the same signal, and either or both of them may be connected to room audio amplifiers. An example of using a single reference on the EF1210 is shown in Figure 3 on page 19. If two references are used, two distinct zone output signals will be generated, one (Zone A) correspond ing to Reference A (AEC A) and the other (Zone B) cor responding to Reference B (AEC B). These may, for example, feed room audio amplifiers in two acoustically isolated areas or rooms. Each input channel must be associated with exactly one of the two references. By default, all channels are associated with AEC A. If two references are used, some microphone input channels will in the soundfield of Z

A and must therefore be

ONE

associated with Reference A (AEC A), while other microphone input channels will lie in the soundfield of Z

B and must therefore be associated with Reference B (AEC

ONE

B). See Figure 4 on page 20 for a block diagram of using a single EF1210 with two references and zones.

PSTN

Room A

Room B

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

CH 8

ZONE A AEC A

EF1210

ZONE B AEC B

OUT 1

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

OUT 8

Auto Mixer (A)

Auto Mixer (B)

TO AEC

FROM AEC

TO AEC

FROM AEC

REMOTE

EF200 (A) (Optional)

REMOTE

EF200 (B) (Optional)

REMOTE

FROM

CODEC

(A)

CODEC

(B)

PSTN

Figure 4. Two independent rooms using a single EF1210

DVANCED INSTALLATION

Typical EF1210 Connections

5-8

HANTOM

INELINELINELINELINE

HANTOM

Remote Control System

ASPI BUS IN

ID 8

ID 4

ID 2

ID 1

ID 16

EVICE

ESERVEDRESERVED

HANTOM

ASPI BUS OUT

The EF1210 will typically be connected to other equipment in a single zone setup as shown below in Figure 5.

POWER LOW HIGHVOLUME

microphone

8 microphones

(Optional)

PIN 2: TX

PIN 2: TXD

3: RX

3: RXD

REMOTE CONTROLREMOTE CONTROL

RS-232

5, 15 VDC 5, 12 VDC

. . .

MIC/LINE INPUTS

436587 PLAY

ASPI Bus Connection for RS-232 Control

)

VERRIDE

UPPRESSION

ID 4

ID 3

ID 2

ID 1

ID 0

OISE

EVICE

ESERVED

PROM

AGC

REMOTE CONTROL

RS-232

LOGIC IN/OUT

microphone

AEC REF

AUX

AMIX

AEC BAEC A 21436587 REC

8 Line Level Signals

Reference Input

ASPI BUS

TO PHONE

EF400

INTERFACE

ASPI BUS

TO LINE

OUT

EF1210

LINE OUTPUTS

. . .

Automatic

Microphone

Mixer

EF200 Phone Add (Optional)

FROM

AECTOAEC

REMOTETOREMOTE

5, 15 VDC

FROM

POWERED SPEAKER

CODEC

ZONE

POWER

Figure 5. Typical EF1210 Connections

• Connect each of the 8 M accepts mini-Phoenix connectors. See “Connector Pinouts” on page 88 for pinouts.

• Connect each of the 8 L mixer. Each L

Caution!

• Connect the zone output (Z speaker.

• Connect the reference input (AEC A or AEC B) to T nect only one reference per EF200) or to the output of the CODEC.

• Connect the output of your aut omi xer to F of your CODEC.

• If RS-232 remote control is desired, connect the RS-232 R of the EF1210 to the remote control device, such as an RS-232 interface to a touch panel or a COM por t on a personal computer. Connect the ASPI B on the EF1210 to the ASPI B

CODEC/hybrid

TX RX

INE INPUT

IC/LINE INPUTS

INE OUTPUTS

INE OUTPUT

PSTN

to a microphone. The MIC/L

to the inputs of an automixer or matrix

uses a mini-Phoenix connector.

Set mixer inputs to 0 dBu line level, phantom power OFF.

A or Z

ONE

on the EF200, if you are using an EF200

US IN

B) to an amplifier or powered loud-

ONE

AEC on the EF200 (con-

AEC on the EF200 or to the in put

ROM

EMOTE CONTROL

port

US OUT

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 21

Phone Add.

EF1210 U

SER MANUAL

Playback/Record

Note.

The external RS-232 control device may b e co nnected to an y ASPI device to control all ASPI devices that are linked via the ASPI Bus.

• Connect the external power supply to the P

OWER SUPPLY INPUT

jack of the

EF1210.

The EF1210 provides the capability to record a nd play back audio to y our conference. Playback allows you to play the audio output of an external device, such as a television or VCR, to the conference. Record allows you to record the audio of the conference to an external device, such as a tape recorder.

auto-reverse

TAPE RECORDER

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

CH 8

VCR

ZONE A

REC

12:00

AUXINTO

CODEC

EF1210

AEC A

AMIX

OUT 1

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

OUT 8

Auto

Mixer

CODEC

Figure 6.

Block diagram of record and playback connections with the EF1210.

To implement the playback function with the EF1210, a playback signal must be added to both the local audio (Zone) output and the remote output (the signal sent to the CODEC or other terminal communication device). To implement the record function, both the local audio and the remote CODE C signal must be mixed and output to a recording device. Since the remote output will normally be produced by an automixer external to the EF1210, the output of the a utomixer must be av ailable to be mixed with the R

and AUX IN signals. This mixing may be implemented using an

external matrix mixer if available, or using the internal mixers provided in the EF1210. In addition to the convenience of using the EF121 0 mixers, th e EF1210 provides remote control of the level of the A

signal so that weak recordings may be

UX IN

boosted to be audible at both ends. To use the EF1210 Playback mi xer, the out put of th e automix er must be brough t in to

the A minal device) must be taken from the T input on the EF1210 will be added internally to the T Z

ONE

input on the EF1210, and the input to the CODEC (or other remote ter-

MIX IN

CODEC output of t he EF1210. Th e AUX IN

CODEC signal, and also to the

A output.

DVANCED INSTALLATION

To use the internal EF1210 Record mixer, the output of the automixer must be brought in to the A from the automixer output as well or may be taken from the T EF1210. The R

input on the EF1210. The input to the CODEC can come

MIX IN

CODEC output of t he

output will carry a mix of the A

and the AEC A signals.

MIX IN

Alternatively, you can do this mixing externally (con nect playb ack o utput of ex ternal program audio device to an automixer input). If record and playback signals are generated using an external mixer, the A

UX IN

and A

inputs and the REC and TO

MIX IN

CODEC outputs will not be used on the EF1210.

Note.

If the EF1210 AUX IN is not used, the playback signal should be mixed with the AEC Reference signal rather than with the Zone

output signal for local p l ayback.

Playback and record are only available with the Reference A (AEC A) and Zone A signals. If two zones are used, playback will NOT function properly in Zone B because it will only be added to Reference A input signal from the far-end.

Using playback and record in the second zone of a multi-zon e system will require using the matrix mixer to create appropriate mixes outside of the EF1210.

See Figure 7 on page 23 below for the interconnection of A

and REC input and

UX IN

output, respectively.

Ch 3

. . .

AEC

EF1210

Ch 4 AEC

Rec

Amix

CODEC

Aux

+ ++

GainGain

A/D

Level adjust

Line

AEC

Reference

A/D

Level

adjust

Line

AEC

Reference

Ch 5

AEC

Ch 6 AEC

. . .

Figure 7.

Playback and Record in the EF1210

To record,

• Connect the R

output of the EF1210 to the audio input on the recording

device.

• Connect A

• Connect T

to the output of the automixer or matrix mixer.

MIX IN

O CODEC

to F

AEC on the EF200 or the input of the CODEC.

ROM

For playback,

• Connect the A

of the EF1210 to the audio output of the playback

UX IN

device.

• Connect A

to the output of the automixer or matrix mixer.

MIX IN

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 23

EF1210 U

SER MANUAL

• Connect TO C

Note.

When using the internal EF1210 Record and Play circuitry, a signal being played back will NOT be reco rd ed to avoid the potential

of a feedback loop caused by the record/playback device.

ODEC

to F

AEC on the EF200 or the input of the CODEC.

ROM

DVANCED INSTALLATION

Figure 8 on page 25 depicts connections on the EF1210 for record and playback.

INELINELINELINELINE

microphone

8 microphones

. . .

POWER LOW HIGH VOLUME

Remote Control System

(Optional)

EF1210

LINE OUTPUTS

8 Line Level Signals

. . .

HANTOM

ESERVEDRESERVED

ASPI BUS IN

PIN 2: TXD

PIN 2: TX

3: RX

ASPI BUS OUT

3: RXD

REMOTE CONTROLREMOTE CONTROL

ID 8

ID 4

ID 2

ID 1

ID 16

EVICE

5-8

HANTOM

RS-232

5, 15 VDC 5, 12 VDC

MIC/LINE INPUTS

436587 PLAY

AEC REF

AUX

AMIX

AEC BAEC A 21436587 REC

Record Output

Play Input

Automatic

Microphone

Mixer

ASPI BUS

OUT

Reference Input

TO PHONE

EF400

INTERFACE

TO LINE

EF200 Phone Add (Optional)

FROM

AECTOAEC

REMOTETOREMOTE

ASPI Bus Connection for RS-232 Control

)

auto-reverse

VCR

TAPE RECORDER

12:00

VERRIDE

UPPRESSION

ID 4

ID 3

ID 2

ID 1

ID 0

OISE

EVICE

ESERVED

PROM

AGC

REMOTE CONTROL

RS-232

LOGIC IN/OUT

Record and Play Devices

PSTN

CODEC/hybrid

POWERED SPEAKER

ZONE

CODEC

Output to EF200 (optional) or CODEC

5, 15 VDC

TX RX

ZONE

POWER

Figure 8. EF1210 Connections for Record and Playback

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 25

EF1210 U

SER MANUAL

Connecting Multiple EF1210s

ID 8

ID 4

ID 2

ID 1

5-8

HANTOM

Device ID 0

5-8

HANTOM

Device ID 1

HANTOM

ESERVEDRESERVED

ID 16

EVICE

ID 8

ID 4

ID 2

ID 1

ID 16

EVICE

HANTOM

INELINELINELINELINE

HANTOM

INELINELINELINELINE

Multiple EF1210s can be easily connected together to add more zones or microphones to your setup. The ASPI Bus allows multiple dev ices to be controlled by a single RS-232 connection. Reference signals to each EF1210 must still be wired to each EF1210.

ASPI BUS IN

ASPI BUS OUT

ASPI BUS IN

ASPI BUS OUT

PIN 2: TXD

PIN 2: TX

3: RX

3: RXD

REMOTE CONTROLREMOTE CONTROL

PIN 2: TXD

PIN 2: TX

3: RX

3: RXD

REMOTE CONTROLREMOTE CONTROL

5, 15 VDC 5, 12 VDC

RS-232

5, 15 VDC 5, 12 VDC

RS-232

MIC/LINE INPUTS

436587 PLAY

MIC/LINE INPUTS

436587 PLAY

AEC REF

AMIX

AUX

AEC BAEC A 21436587 REC

8 Line Level Signals

AEC REF

AMIX

AUX

AEC BAEC A 21436587 REC

8 Line Level Signals

LINE OUTPUTS

. . .

Automatic

Microphone

Mixer

LINE OUTPUTS

. . .

Automatic

Microphone

Mixer

CODEC

ZONE

POWER

ZONE

POWER

HANTOM

ESERVEDRESERVED

ASPI BUS IN

PIN 2: TXD

PIN 2: TX

3: RX

ASPI BUS OUT

3: RXD

REMOTE CONTROLREMOTE CONTROL

RS-232

ID 8

ID 4

ID 2

ID 1

ID 16

EVICE

HANTOM

INELINELINELINELINE

HANTOM

5-8

HANTOM

Device ID 2

Figure 9. Connecting multiple EF1210s

Connecti ng th e ASPI Bus

The ASPI Bus can connect multiple ASPI Digital products, such as the EF1210, to the same RS-232 remote control device. This means only one RS-232 connection is needed to control all devices on the ASPI Bus. Each device on the ASPI Bus should have a different Device ID or Type ID, so that each device can be addressed and controlled individually. Note that each different type of ASPI Digital product (e.g. EF200, EF1210) has a distinct Device Type. This means, for example, that an EF200 may have the same Device ID as an EF1210 without causing a conflict. These steps should be followed to connect the ASPI Bus:

1. Connect the RS-232 remote control device to the first ASPI Digital product in the

2. Connect an ASPI Bus cable between the A

3. Connect an ASPI Bus cable between the A

5, 15 VDC 5, 12 VDC

Note.

chain.

the A

SPI BUS IN

the A

SPI BUS IN

MIC/LINE INPUTS

436587 PLAY

AEC REF

AUX

AMIX

AEC BAEC A 21436587 REC

8 Line Level Signals

LINE OUTPUTS

. . .

Automatic

Microphone

Mixer

CODEC

ZONE

POWER

The Device ID of each EF1210 should be different from other EF1210s connected together.

SPI BUS OUT

of the first device, and

of the second device.

SPI BUS OUT

of the second device, and

of the third device, and so on.

DVANCED INSTALLATION

ALIBRATION

For the EF1210 to work effectively, it must be calibrated properly to receive correct levels from the surrounding equipment, such as micropho nes, amplifier, and CODEC. The calibration procedure is required only to adjust the EF1210 to accommodate the electrical characteristics of your conferencing equipment. The procedure allows you to connect the widest po ss ibl e variety of equipment to your EF1210. It does no t t rai n the AEC. The EF1210 does not require training.

In calibration mode, the EF1210 generates a precise noise signal for measuring the characteristics and sensitivity of the microphone. You only need to perform this calibration at the initial installation. You do not have to calibrate the EF1210 each time it is used.

Calibration Steps

Acoustic Gain

Note.

• Calibration Step 1: Calibrating Microphone Input Channels (page 29)

• Calibration Step 2: Calibrating Zone Outputs, Check Acoustic Gain (page 30)

• Calibration Step 3: Calibrating AEC Reference Inputs (page 32)

• Calibration Step 4: Calibrating for Playback and Record (page 33). This step may be skipped if you are not using playback and record on the EF1210.

• Calibration Step 5: Zone/Reference Setup (page 34)

Acoustic gain is the maximum amplification that may be applied to a room’s audio before being picked up by the microphone(s). The volume control may be set at a lower level than this maximum amplifi cation, but must not be set higher. Too much acoustic gain occurs if the loudspeaker volume going into the microphone is louder than the local talker’s volume. This may happen as a result of a combination of the following setups: the loudspeaker volume is turn ed up too much, the microphone level is too high, the microphone is too close to the loudspeaker, or the talker is no t talking close enough to the microphone relative to the loudspeaker volume. Acoustic gain is commonly misunderstood, so when the audio in a room is not loud enough , it seems logical to turn up the volume on the amplifier or loudspeaker. This is often not the best remedy. For example, it may be necessary to tur n up the reference input level instead. Breaking through the acoustic gain threshold can cause echoes and howling as loudspeaker levels overpower the microphones.

The calibration procedure will outline how to associate a volume level with the acoustic gain of a room. Refer to “Check Acoustic Gain” on page 31.

When calibrated for the particular microphone and CODEC setup, the EF1210 will provide years of service without recalibra-

tion. If the signal levels are not calibrated, the performance of the EF1210 will not be satisfactory. When the signal levels are calibrated correctly, the EF1210 easily and automatically handles any type of signals and changes in room acoustics to provide unparalleled echo cancellation performance.

If you decide to use a different kind of microphone once the EF1210 has been calibrated, the microphone inputs on the

EF1210 will be n eed to be recalibr ated.

ASPI Digital - The Sound of DSP Technical Support: 404.892.3200 27

EF1210 U

SETUP

SER MANUAL

Two Methods of Calibration

The EF1210 can be calibrated two ways: calibrating with a computer or wi th out. We recommend using a computer for calibration because it is an easier procedure and it is more precise. If you have a computer, please refer to our on-line document for computer calibration procedures. See “Calibrating With a Computer” below for our web address. If you do not have a computer, please refer to ““Calibr ating Without a Computer” on page 28” for front panel setup.

ALIBRATING WITH A COMPUTER

Included in your shipmen t of the EF1210 is a dis kette co ntai ning t he EF Panel C ontro l Software and a PDF version of the EFPanel User Manual, which includes installation instructions. Install EFPanel and use it to calibrate the EF1210 with a computer. Also included is a hardcopy of this manual. This control software and manual may be changed and updated periodically, so please visit our website at http://www.aspi.com for the most recent versions.

ALIBRATING WITHOUT A COMPUTER

In Calibration mode, the S are currently executing. The different modes are shown in Table 3 below. Press the A

UX IN LEVEL/SETUP

you have finished Calibration Step 5, press the A exit Calibration mode; any changes that you made will be saved as the default poweron settings when you exit the Calibration procedure.

LED will blink to let you know which setup step you

ETUP

button to move from one Calibration s tep to the next. When

UX IN LEVEL/SETUP

button again to

If you miss a Calibration step or lose your place and get to the wrong C alibration step, you may either continue and come back to the missed step later or exit Calibration mode (by pressing A

UX IN LEVEL/SETUP

button repeatedly until the S

ETUP

LED is no longer illuminated), re-enter Calibration mode, and resume Calibration at the step that you missed. If you wish to exit Calibration mode and discard any changes that you

made, you must cycle power on the EF1210 before exiting Calibration mode.

Legend:

LED Off LED On ButtonLED Blinking

Figure 10. Legend for calibration drawing s.

ALIBRATION MODE

MIC Input Calibration S Z

Output Calibration S

ONE

AEC R

Input Calibration S

Calibrating for Playback and Record S Zone/Reference Setup S

LED blinks on ce per period

ETUP

LED blinks twice per period

ETUP

LED blinks three times per period

ETUP

LED blinks four times per period

ETUP

LED blinks five times per period

ETUP

Table 3: Visual indication of calibration mode.

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