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Vortex EF1210 User Guide

1. FROM TR REMOTE lt EF200 CODEC mes EI LL Optional A gU UT Auto Mixer A ru zo i 9073 0 REMOTE gt ours Ly 1210 outs gt FROM 4 3 dis Auto Mixer B AEC REMOTE 9 99 11 I 200 CODEC Room B Optional B Figure 4 Two independent rooms using a single EF1210 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION Typical EF1210 The EF1210 will typically be connected to other equipment in a single zone setup as Connections shown below in Figure 5 Remote Control System Optional EF1210 PH mino REF LINE OUTPUTS wh 1 45 NF ZINE on oo AAAMAAAAAAAA SE ASPI OUT RS 232 8 Line Level Signals o o o o o o o o Automatic rt Microphone o ROS Oe ORORO 66009 ASPI Bus Connection for RS 232 Control EF200 Phone Add Optional e 5315 VOC CODEC hybrid Figure 5 Typical EF1210 Connections e Connect each of the 8 MIC LINE INPUTS to a microphone The MIC LINE INPUT accepts mini Phoenix connectors Se
2. v Judge aQa ZONE gt Plaintiff yt cue gt gt To R 5 REMOTE Detendant Cf pl ours gt L gt S Witness gt EF200 EF1210 CODEC Podium CJ gt ous ours gt gt Optional Well CPHL ours gt S8 et SE Or 5 Jury pl I X FROM TO TN gt REMOTE gt cue mx Ly Logic Port goog 0099 0999 a cod Gallery Figure 18 Court Rooms using the EF1210 In courtroom applications the Zone output should be mixed with all input micro phone channels in the auto mixer to be output to an amplifier or powered loudspeak ers A typical courtroom setup may include microphones for the judge plaintiff defendant etc as well as at least 3 separate loudspeaker outputs that go to the well the jury and the gallery You can allow the judge to mute microphones through the RS 232 control on the EF1210 or through the logic port on the automixer For recording use the direct output for each microphone on the automixer to output to an 8 channel recorder FURTHER ASSISTANCE For other system configurations or design assistance please contact ASPI Digital at Application Engineering ASPI Digital 1720 Peachtree St NW Suite 220 Atlanta GA 30309 2439 Phone 404 892 3200 Fax 404 892 2512 Email help aspi com 86 http
3. ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 9 EF1210 USER M ANUAL If you selected only one of the Zone Outputs repeat for the second Zone Output Check Acoustic Gain iii At this point you are ready to calibrate the absolute maximum room audio ampli fication level For this step you should ensure that the microphones have been returned to their normal operating location and orientation This procedure uses a known nominal electrical noise signal level at the zone output to let you see if any of the microphone input channels will exceed the permissible acoustic gain during normal conferencing operation The level of this noise signal is such that if any microphone input channel registers more than three green LEDs on the EF1210 INPUT SIGNAL LEVEL METER the acoustic gain limit of that microphone channel has been reached This represents the maximum amplification that may be applied to the room audio The room audio may be run at any level below this threshold but should not be amplified beyond this level unless the acoustic gain is reduced by some other means see the Troubleshooting section in the EF1210 User Manual All microphones should be checked in this step as verification that no micro phone inputs or zone outputs have been miscalibrated As above both Zones can be adjusted at the same time both AEC A and AEC B LEDs will be lit indicating Zone A and Zone B This is recommended because you can ch
4. Lock the front panel buttons Toggle between locked and unlocked Request status of front panel lock EF1210 M essages The following messages are sent by the EF1210 in response to a LOCKFP com mand or in response to any LOCKFP command when acknowledgment mode is on Front panel buttons are currently unlocked Front panel buttons are currently locked Example In the following example the remote control device requests the status of the front panel buttons of the EF1210 with Device ID number 12 Then it locks the front panel on the same EF1210 Acknowledgment mode is enabled C12LOCKFP C12LOCKFPO C12LOCKFP1 C12LOCKFP1 ASPI Digital The Sound of DSP Technical Support 404 892 3200 69 EF1210 USER M ANUAL MUTEIN ENABLE DISABLE MUTE ON MICROPHONE INPUT CHANNEL N Remote Commands EF1210 M essages Example 70 The MUTEIn command mutes the microphone input channel n of the EF1210 The factory default setting for MUTEInis 0 not muted The following commands can be sent by the remote control device to mute or unmute the microphone input channel of the EF1210 UTEInO Unmute microphone input channel n ranges from 1 to 8 Mute microphone input channel UTEIn2 Toggle mute on or off for microphone input chan nel n Request mute status of microphone input channel n The following messages are sent by the EF1210 in response to a MUTEIn com mand or in response to any MUTEI n command
5. ASPI Digital The Sound of DSP Technical Support 404 892 3200 29 EF1210 USER M ANUAL phone toward the loudspeaker Note It is vital to move the SPL meter and or microphones so that each microphone sees the correct dB SPL acoustic level as you are cal ibrating Do not assume that because the first microphone sees the dB SPL level all other microphones will see the same level unless they are moved to occupy the same location as the first 1 6 Adjust the loudspeaker volume so that a nominal dB SPL level based on Table 4 is registered at the microphone Note Always double check the microphone level with normal speech once the microphones are in normal operating position Actual speech levels may vary depending on room reverberation etc Verify that you set a reasonable level three green LEDs and one solid yellow LED or 0 dB by actually talking and looking at the meter 1 7 Use the LEVEL ADJUST buttons to adjust the channel input gain until 3 green and 1 yellow or 0 dB LED are lit on the INPUT SIGNAL LEVEL METER 1 8 Repeat steps 3 7 for all input channels 1 9 Return all microphones to their normal operating location and orientation Note Use caution if the microphones lie in two acoustically separated zones and you are only calibrating one zone As you cycle through microphones that lie in the other zone no activity will be indicated on the INPUT SIGNAL LEVEL METER CALIBRATIO N STEP 2 CALIBRA
6. Remote Commands EF1210 Messages Example 78 The SELECTIn command sets the front panel INPUT meter to display input channel n of the EF1210 The factory default setting for SELECTIn is 1 input channel 1 The following commands can be sent by the remote control device to set the front panel INPUT meter to display input channel n 1 Set front panel INPUT meter to display input chan Remote Command nel n ranges from 1 to 8 Request current assignment of front panel INPUT meter The following messages are sent by the EF1210 in response to a SELECTI com mand or in response to any SELECTI n command when acknowledgment mode is on SELECTIn Front panel INPUT meter is currently set to display input channel n In the following example the remote control device requests the current channel dis played on the INPUT meter of the EF1210 with Device ID number 7 Then it sets channel 5 to be displayed on the INPUT meter of the same EF1210 Acknowledgment mode is enabled Remote Command CO7SE COTS CO7SELEC 5 CO7SE EF1210 Message EL ECTII I 5 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE SELECTRC SET FRONT PANEL REM OTE METER TO DISPLAY REM OTE INPUT CHANNEL The SELECTRc command s
7. FROM AEC Y FROM REMOTE EF200 Optional TO REMOTE CODEC K i Figure 3 Single room using an EF1210 single zone ASPI Digital The Sound of DSP Technical Support 404 892 3200 19 Zoning 20 EF1210 USER M ANUAL 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 corresponding to Reference A AEC A and the other Zone B corresponding 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 ZONE A and must therefore be associated with Reference A AEC A while other microphone input channels will lie in the soundfield of ZONE B and must therefore be associated with Reference B AEC B See Figure 4 on page 20 for a block diagram of using a single EF1210 with two references and zones
8. sion mode level Set suppression mode on channel to x X is the noise suppression mode 0 normal aggressive Request AECS status for channel n ASPI Digital The Sound of DSP Technical Support 404 892 3200 59 EF1210 Messages Example 60 EF1210 USER M ANUAL The following messages are sent by the EF1210 in response to an AECSn command or in response to any AECS command when acknowledgment mode is on AECSn0 Suppression mode is currently normal on channel AECSn1 Suppression mode is currently aggressive on chan nel n In the following example the remote control device sets the suppression mode to nor mal on all channels on the EF1210 with Device ID number 7 Then it sets the sup pression mode on channel 2 to aggressive and requests the suppression mode status on channel 6 of the same EF1210 Acknowledgment mode is enabled CO7AECS21 CO7AECS21 CO7AECSO CO7AECS60 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE ERROR ENABLE DISABLE ERROR REPORTING When the EF1210 detects an error usually a command syntax error it may report it using the ERROR message The ERROR command enables or disables the error reporting feature This is useful for debugging the commands coming from the remote control device The factory default setting for ERROR is 1 on Remote Commands The following commands can be sent by the remo
9. ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE GAINP set PLAYBACK INPUT GAIN ON AUX IN INPUT The GAINP command sets the playback input gain level on the AUX IN input of the EF1210 to a level between 0 dB and 15 dB This corresponds to a nominal playback signal level between 0 dBu and 15 dBu respectively For instance setting GAINP to 0 corresponds to a nominal playback signal level of 0 dBu and setting GAINP to 15 corresponds to a lower nominal playback signal level of 15 dBu The purpose of the playback input gain is to bring the signal level of the playback input to a constant value at the A D inside the EF1210 For example if we expect a 12 dBu signal at the playback input we would set the playback input gain to 12 dB by sending the command GAINP12 The playback input gain is set using EF1210 calibration procedures See Using the EF1210 Without RS 232 Control on page 38 The factory default setting for GAINP is 8 8 dBu 10 dBV nominal level expected at input Remote Commands The following commands can be sent by the remote control device to set the playback input gain level GAINPX playback input gain x ranges from 0 dB to 15 dB Request current playback input gain EF1210 M essages The following messages are sent by the EF1210 in response to command or in response to any GAINP command when acknowledgment mode is on Playback input gai
10. 3 4 Press LEVEL ADJUST until first yellow LED on REM OTE meter is flickering regularly and 2nd yellow is flickering rarely LED blinks three 3 5 Repeat for other reference input if neccessary times for AEC Reference calibration POWER INPUT REMOTE A setup 1 2 53 4 s 6 7 8 X COOOOO 12 7 3 0 3200 12 7 3 0320 SETUP STEP 3 4 adjust i STEP 3 2 press level until person to select XX AEC A input selected talking at remote reference input 1 site flickers secon source Q Xl AEC B input selected yellow LED Calibration Step 4 Calibrating for Playback and Record 4 1 Pressthe 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 press LEVEL ADJUST UP to set CODEC OUT level to 0 dBu POWER supe MUTE LEVEL AUXIN REF INPUT ALL ADJUST LEVEL SELECT SELECT X e 12 7 3 0 32048 12 7 3 0 3 20 SETUP STEP 4 2 j STEP 4 20 LED blinks four press to set press to set times for record CODEC OUT CODEC OUT and playback level to 10 level to 0 dBu calibration dBV Calibration Step 5 Zone Reference Setup 5 1 Press the AUX IN LEVEL SETUP button t
11. hot by 6 dB then the reflections of the Zone output signal which are picked up by the microphone will be amplified by 6 dB more than necessary This adds 6 dB to the acoustic gain which may be suf ficient to cause acoustic gain problems This situation could easily arise if for example the conferencing equipment is set up so that participants are too far from the microphone In such a situation after correct microphone setup the local microphone audio level may be too low because of the distance from the talker to the microphone The microphone audio will most likely also be muddy and reverberant The installer or user may try to solve these microphone audio quality problems by turning up the microphone amplification thus adding to the acoustic gain This problem can be remedied by proper microphone selection pickup pattern directionality and placement coupled with proper microphone calibration 3 Athird common cause of acoustic gain problems is excessive coupling between loudspeaker audio and microphones This can be addressed by reducing the microphone coupling either by positioning microphones so that their pickup pat terns are biased away from the loudspeaker audio and direct reflections of loud speaker audio repositioning loudspeakers or reducing the loudspeaker amplification In summary it can be seen from the above that any amplification applied between the reference input and the microphone inputs can add to acoustic gain
12. panel setup 20 dBu to 0 dBu nominal software selectable via RS 232 setup 0 dBu nominal 10 dBV 8 dBu or 0 dBu nominal selectable via front panel setup 20 dBu to 0 dBu nominal software selectable via RS 232 setup 10 dBV 8 dBu nominal software selectable 8 to 8 dB gain 10 dBV 8 dBu nominal gt 10 kOhms 50 Ohms drives 600 Ohms 20 dB nominal with AEC on 125 Hz 7 25 kHz 2 dB in NC only mode AEC off 20 Hz 22 kHz 200 ms gt 65 dB 30 dB second 6 dB or 10 dB selectable The EF1210 complies with the ITU G 167 Recommendation for AEC FCC part 15 ASPI Digital The Sound of DSP Technical Support 404 892 3200 49 EF1210 USER M ANUAL and CE requirements FCC Part 15 This equipment has been tested and found to comply with the limits for a Class A dig ital device pursuant to Part 15 of the FCC Rules These limits are designed to pro vide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radi ate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Opera tion of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Warning FCC Regulations state that any unauthorized cha
13. ww w aspi com Copyright O 1999 All Rights Reserved EF1210 BLOCK DIAGRAM EF1210 BLOCK DIAGRAM aur lt M esioN 0493 ONDA asiON indino euoz 01 gay OL 29199 5 0493 9 V 8 Z9urjolN 9euryolN 994949 94 e9ue1J9jeu ul 13009 SUIT JIN xny oL au17 9 Va euro 7 eur ouw uio fT euro wojueyd uoiueug wojueyd fuojueyd 9 isn pe isn pe isn pe J isnipe 1sn pe A snipe A isnipe gy snipe 18497 18497 1 2027 G 13437 V 1907 ee gt v v v a v a v a v a v lt onoa onoa onoa onoa 109195 jeu Y Y Ve via v a via v d v a v d v d 8indinp Z1ndinp 91ndinp gindino euoz eu euoz H eun indinp zindino indino Figure 19 Inside the EF1210 87 Technical Support 404 892 3200 ASPI Digital The Sound of DSP EF1210 USER M ANUAL CONNECTOR PINOUTS ASPI BUS IN ASPI BUS OUT REM OTE CONTROL o 9 5 232
14. www aspi com Copyright 1999 All Rights Reserved TROUBLESHOOTING reduces the ability of the decision logic to determine whether the AEC should be in transmit receive or double talk mode This effect may reduce the effectiveness of the EF1210 in canceling echoes You can check for insufficient microphone amplification by observing the front panel INPUT LEVEL INDICATOR during normal conferencing conversation The first yellow LED should illuminate frequently If the INPUT LEVEL INDICATOR never illuminates beyond one or two green LEDs during normal speech increase the microphone s input level Note Before you readjust the microphone input levels check to make sure you are looking at the correct channel on the INPUT LEVEL INDICATOR Check also to make sure that you are looking at the correct corresponding reference input level on the REMOTE LEVEL INDICATOR Note If you adjust the MIC LINE INPUT level you will affect the acoustic gain Check to make sure that the acoustic gain limit is not exceeded See Check Acoustic Gain on page 31 Loudspeaker Overdriving the loudspeaker may distort the zone output signal and cause ineffective Nonlinearity AEC operation The EF1210 relies on the linearity of the acoustic feedback path D A amplifier loudspeaker microphone and A D to cancel acoustic echoes If you overdrive the loudspeaker the acoustic reflections picked up by the microphone do not match the signal fed to t
15. 30 Calibration Step 3 Calibrating AEC Reference Inputs esses 32 Calibration Step 4 Calibrating for Playback and Record eus 33 Calibration Step 5 Zone Reference Setup 34 Mounting the EETI210 s i nU Rete db e ERE 36 Operam the BEDAE ctt e 38 Using the EF1210 Without RS 232 Control eee 38 Using the EF1210 With RS 232 Control eese 39 OUTS SOOT osse tuse forte de demde ion fuste olo tutte 42 No Output to Loudspeaker in eee 42 No Output to Remote End aee tees edi oet ere i eee 42 Residual Echo iniecit oot tur eR e ER Perret 44 Remote Control Problems e ee tie ER eese e its 47 Contacting Technical Support eese eren 48 Technical Specifications e ce edet vant nsii saii iins 49 Compliance ri nra a RU C PES US PE OR eee 49 Warranty Information entere ett pedea 51 EF1210 Command Set ReberefiCe 53 Command ose deae eee t Pee EE C ee eee 53 Valid Commands and Messages 55 Default Values and Saved Parameter List eerte 64 PPP MC ALONG inpia Cors tie E OT o rue Ro c Cum UU eH 85 Distance Eearmng di eda eto ql e e ED Dt nee i qn 85 COUFITOOmS RR ERE ee iR RO ERE 86 Further Assistant ee inaron eee prie E eere Ee 86 EFI210 Block gc ahs gee 87 C
16. 5 15 VDC 3 1 5 40 gt 4 88 The ASPI Bus uses RJ45 connectors These should be used with category five twisted pair cable The total distance of the ASPI Bus should be less than 20 m RS 232 Port 9600 8 N 1 The RS 232 port is wired as DCE It accepts a male DB 9 connector Only pins 2 3 and 5 are required by the EF1210 Connect pins straight through do not use null modem 1 DCD 2 TXD 3 RXD 4 DSR 5 ground 6 DTR 7 CTS 8 RTS 9 No connection Power Supply Input The power supply input accepts a 5 pin DIN male connector Only use the power supply provided by ASPI Digital Use of other power supplies will void the warranty 1 Ground 2 Ground 3 5 4 15Vdc 0 3 5 15 1 2 Mic Line Inputs A Mix In Aux AEC Ref Line Outputs Rec To CODEC Zone Outputs These audio connectors accept a mini 3 5 mm 3 conductor terminal block provided See Note below for manufacturer information From left to right the conductors are positive signal negative signal and shield ground To avoid ground loops do not connect shield ground at both ends of the cable except to microphones ground is required at both ends for phantom power http ww w aspi com Copyright 1999 All Rights Reserved CONNECTOR PINOUTS Note The information below lists manufacturer information for the Phoenix connector that we use Manufacture
17. AUX IN signal may be adjusted during normal operation to compensate for low audio level from an external playback device The playback level can be adjusted using the following commands from the RS 232 command set GAINPx Set playback input Playback input gain set to x dB gain to x x ranges from O to 15 dB The default is 8 dB GAINP Request playback Current gain for playback is returned input gain to remote control device Note See the GAINP set PLAYBACK input gain on AUX IN input on page 65 for a more detailed description of the playback input gain x M uting The channels on the EF1210 can be muted using the RS 232 command set Using the MUTEI command will mute the outgoing audio on LINE OUTPUT of the channel that is muted The MuTE ALL LED will light only when all channels are muted Eis Outgoing audio on channel n is muted MUTEI Mute all channels All channels are muted the MUTE ALL LED lights 40 http ww w aspi com Copyright 1999 All Rights Reserved OPERATING THE EF1210 Wideband NC vs Having the option to turn the AEC off for wideband noise cancellation is particularly AEC mode useful when used in a system that has both conferencing capabilities and sound rein forcement For this system we suggest programming the remote control device to turn on the AEC on each channel of the EF1210 if the room is being used for a confer ence when the phone or CODEC is connected At any other
18. EF Device Control Panel File View Passcodes Help Setup EF1210 2 CALIBRATE ZONE CUTPUT ACOUSTIC GAIN 1 Adjust The Zone Output Levels To Match External Amplifier Zone dBu jo Zone dBu fo r ii Select White Noise Output Source BOTH Zonas ii For Each Input Channel Adjust Amplifiers Loudspeakers So That No More Than 3 L D s Are Lit coe NE lt Back Next gt mimm EF1210 00 For Help press F1 Figure 24 Calibration Step 2 Calibrating Zone outputs i Adjust the Zone output levels to match external amplifiers Check the specifica tions of your room audio amplifier input e fitexpects consumer level 10 dBV input adjust the Zone output gain to 8 dBu 10 dBV 7 8 dBu e fithas a balanced input connector and expects 0 dBu input level adjust the Zone output gain appropriately Note The Zone output gain is also adjustable from 20 dBu to 0 dBu using the UP and DOWN arrows on EFPanel ii Select pink noise output source This is the Zone that will output pink noise for microphone calibration Choosing both Zone A and Zone B together will cali brate both zones at the same time to the same level e The default choice is pink noise played in both Zone A and Zone B e Choose Pink noise to Zone A for pink noise in Zone e Choose Pink noise to Zone B for pink noise in Zone
19. a lower signal level say 18 dBu line level or 51 dBu mic level on channel 3 then we would turn up the gain by 18 dB on channel 3 This would be accomplished by sending the command GAINI318 The input channel gain is set using EF1210 calibration procedures See Calibration Step 1 Calibrating Microphone Input Channels on page 29 The factory default setting for GAINInis 0 0 dBu nominal level expected at input The following commands can be sent by the remote control device to set the MIC LINE input gain level GAINInx Set MIC LINE input gain on channel n n ranges from 1 to 8 x ranges from 0 dB to 31 dB GAINIn Request current MIC LINE input gain on channel n Note The wildcard character is not allowed for specifying the chan nel number n for the GAINIn command The following messages are sent by the EF1210 in response to a GAINIn com mand or in response to any GAINIn command when acknowledgment mode is on camNinx MICILINE input gain on channel n is x input gain on channel n is currently x ASPI Digital The Sound of DSP Technical Support 404 892 3200 63 EF1210 USER M ANUAL Example 64 In the following example the remote control device requests the current MIC LINE input gain on channel 5 of the EF1210 with Device ID number 7 Then it sets a new level on channel 5 on the same EF1210 Acknowledgment mode is enabled CO7GAINI512 CO7GAINI512 CO7GAINI2 CO7GAINI20 http
20. for each input channel Be sure to move SPL meter or mics so each mic sees the appropriate SPL level REMOTE S ADN Us O 1410 3 0 3 20 dB 12 7 3 0 320 STEP 1 5 adjust level until 3 green and 1 yellow LEDs are lit repeat for each channel STEP 1 1 Press and hold AUX IN LEVEL SETUP button and INPUT SELECT for 2 seconds to enter configuration mode STEP 1 3 000 LEDs light to press to select oo 77 indicate which channel for LED blinks channel is selected calibration for microphone calibration 3 AUXIN REF INPUT LEVEL SELECT SELECT SETUP Du AE Ye 2 3 40 Y 7 08 e e o OOOOXOOOOO SETUP ink noi ise level STEP 1 2 press to Xx pink noise to both zones Seay select noise source no noise generated at mic XY pink noise to zone A XR ink noise to zone B or refer to xl Table 4 Calibration Step 2 Calibrating Zone O utputs Check Acoustic Gain 2 1 Press the AUX IN LEVEL SETUP button to enter Zone O utput 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
21. for installation Also please make sure you have the correct equipment outlined below before you begin installation What s Included 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 Registration Card W hat s Not Included 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 EF200 Phone Add see Note below Automatic microphone mixer or matrix mixer Audio cables Videoconferencing CODEC or other four wire interface optional RS 232 remote control device optional Tools Needed e Sound Level Meter SPL meter e Screwdriver to mount EF1210 in your rack 10 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION ASPI Digital The Sound of DSP 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 function of the EF200 is the line echo canceller LEC which digitally eliminates
22. host as an acknowledgment The variables that are saved as a result of this command are listed at the end of this document Refer to Default Values and Saved Parameter List on page 84 There are 4 storage locations for saving settings These can be used to store different user configurations When the EF1210 boots up it loads the settings from slot 0 In other words whatever settings you save to slot 0 will be restored every time you reset the EF1210 This provides a way of setting the power on defaults Also every time you perform a front panel setup the results of the setup are saved to slot 0 This is done so that you don t have to set up the EF1210 every time you lose power Remote Commands The following commands can be sent by the remote control device to save the current settings in non volatile memory SAVENVm Save settings to non volatile memory slot m m ranges from 0 to 3 EF1210 M essages The EF1210 sends the following message in response to a SAVENVm command if acknowledgment mode is enabled The settings were successfully saved to non vola tile memory slot m m ranges from 0 to 3 Example In the following example the remote control device saves the settings of the EF1210 with Device ID number 12 in memory slot 0 C12SAVENVO C12SAVENVO ASPI Digital The Sound of DSP Technical Support 404 892 3200 71 EF1210 USER M ANUAL SELECTIN SET FRONT PANEL INPUT METER TO DISPLAY INPUT CHANNEL N
23. 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 con trolled 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 chain 2 Connect an ASPI Bus cable between the AsPI BUS OUT of the first device and the AsPr BUS IN of the second device 3 Connect an ASPI Bus cable between the AsPI BUs OUT of the second device and the AsPr Bus IN of the third device and so on http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION CALIBRATION For the EF1210 to work effectively it must be calibrated properly to receive correct levels from the surrounding equipment such as microphones 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 possible variety of equipment to your EF1210 It does not train the AEC The EF1210 does not require training In calibration mode the EF1210 generates a precise noise signal for measuring the characterist
24. level on channel to x nranges from to 8 x is either 6 dB or 10 dB Request current noise cancellation level on channel The following messages are sent by the EF1210 in response to an NCLn command or in response to any NCLn command when acknowledgment mode is on noise cancellation level on channel is x x is either 6 dB or 10 dB In the following example the remote control device sets the noise cancellation level to 10 dB on all channels on the EF1210 with Device ID number 12 Then it requests the noise cancellation status on channel 5 and sets the noise cancellation level on channel 7 to 6 dB of the same EF1210 Acknowledgment mode is enabled Note Itis possible to use a wildcard for setting NCLn to 6 or 10 but not for querying Remote Command EF1210 Message C12NCL 10 C12NCL 10 C12NCL5 C12NCL510 C12NCI C12NCL76 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE PING SEE WHICH DEVICES ARE PRESENT Remote Commands EF1210 Messages Example The PING command pings all of the devices on the ASPI Bus to find out what is connected to it Each device will respond with a PONG message which contains its device type and device ID This lets you know how many of each type of device are connected and what device ID they have Generally the PING command should be used with asterisks to query all devices or d
25. meaning EFASGNnc Reference c is assigned to channel n c is either A or B n ranges from 1 to 8 In the following example the remote control device requests the reference channel assigned to channel 1 and channel 2 on the EF1210 with Device ID number 7 Then it assigns Reference A to channel 2 of the same EF1210 Acknowledgment mode is enabled CO7REFASGN1 C12REFASGNIA CO7REFASGN2 C12REFASGN2B CO7REFASGN2A C12REFASGN2A http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE RESETF RESTORE ALL SETTINGS TO FACTORY DEFAULT The RESETF command causes all the EF1210 settings to be restored to the factory default This command does not save the settings to non volatile memory but you can follow the RESETF command with a SAVENV command to do this The vari ables that are restored as a result of this command are listed at the end of this section Refer to Default Values and Saved Parameter List on page 84 Remote Commands The following command can be sent by the remote control device to restore the EF1210 to the factory defaults RESETE Change all the settings back to their factory defaults EF1210 M essages The EF1210 sends a RESETF message in response to a command after it sends status messages for each of the settings that were changed by the restore operation if acknowledgment mode is enabled RESETE The EF1210 has finished restoring the f
26. mode of the EF1210 The wideband SR48 48 kHz mode is provided for applications that require high fidelity noise cancella tion In the wideband mode acoustic echo cancellation is disabled but the noise can cellation continues to function The factory default setting for SR is 16 normal sampling rate The following commands can be sent by the remote control device to change the sam ple rate of the EF1210 1 Change to normal 16 kHz sampling rate Change to wideband 48 kHz sampling rate Request current sampling rate The following messages are sent by the EF1210 in response to a SR command or in response to any SR command when acknowledgment mode is on SR1 516 lhe EFI2T0 iscomeniy cunninip at EF1210 is currently running at its normal 16 kHz sampling rate SR48 The EF1210 is currently running in wideband 48 kHz mode In the following example the remote control device requests the current sampling rate of the EF1210 with Device ID number 7 Then it changes the sampling rate to 48 kHz of the same EF1210 Acknowledgment mode is enabled COT7SR CO7SR16 CO7SR48 CO7SR48 http www aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE SW VER REQUEST SOFTWARE VERSION The SWVER command requests the software version of the EF1210 Remote Commands The following commands can be sent by the remote control device to request the soft ware version of the device Req
27. 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 amp 7 for each input channel LEVEL POWER INPUT REMOTE ADJUST 3 0 3 20 dB 12 7 3 0 320 STEP 2 7 adjust external amplifiers loudspeakers so that no more than 3 green LEDs are lit repeat for each channel STEP 2 3a press if amp expects consumer level input 10 dBV STEP 2 3b press if amp expects 0 dBu balanced input 8 http ww w aspi com STEP 2 6 press to select channel check level LED blinks twice for Zone calibration AUXIN REF INPUT AEC AEC LEVEL SELECT SELECT SETUP AB SETUP STEP 2 2 EELS press to select noise source RO 53 LEDs light to 1 indicate which E channel is selected V noise to both zones recommended noise to zone A noise to zone B Copyright 1999 All Rights Reserved QUICK 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
28. the soundfield of the loudspeaker connected to the Zone B output channel 3 must be con figured to use Reference B AEC B as its reference EF Device Control Panel File View Passcades Help Setup EF1210 5 REFERENCE CHANNEL SETUP Select Reference Chanrel For Each Input Channel CHH RefA RefB c Next gt Cancel Finish 1210 00 For Help press F1 Figure 27 Step 5 Zone Reference Setup http ww w aspi com Copyright 1999 All Rights Reserved CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE i Select the Reference Channel for each Input channel Note If you are using only one reference signal Reference A all microphones must be configured to use that reference signal If you are using two reference signals Reference A and Reference B Input Channel I must be associated with Reference A AEC A and Input Channel 8 must be associated with Reference AEC B The other 6 microphones can be associated with either refer ence ii Once you have finished the Zone Reference Setup click on the Next button at the bottom of the page to view options for saving the setup settings SAVE SETUP SETTINGS EF Device Control Panel View Passcodes Help Setup EF1210 SAVE SETUP SETTINGS Select Save Option C Save To File Save To Nonvolatile Memory Memory Slo
29. units that are longer in length so that you can access the Phoenix con nectors on the backpanel more easily e Locate the cable clamp on the back panel of the EF1210 above the RS 232 port e Remove the screw and thread the power cord through the cable clamp e Attach the cable clamp to the back panel of the EF1210 and tighten the screw Align the clamp so that the power cable does not interfere with the connectors on the EF1210 backpanel e Plugin the power supply e Werecommend that you also Ty wrap the power supply to the rack ASPI BUS IN 082008 35 13 DE MIC LI EEEE T EREET REMOTE CONTROL fist 0222 a 1 2 3 4 5 2 amp 1E EET EE ASPI BUS OUT RS 232 Figure 16 Attaching a cable clamp to the back panel of the EF1210 36 The purpose of securing the power supply to the back panel is so that if the power supply were to drop it would pull where the cord is attached with the cable clamp and not pull the plug out of the EF1210 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION Caution Caution Caution Caution Caution Caution Caution Caution Do not use any other power supply other than the one provided with this unit Failure to use all four screws to attach the EF 1210 to the rack may result in uneven loading and cause a safety hazard Ensure that the power supply
30. when acknowledgment mode is on Mute is disabled on microphone input channel n Mute is enabled on microphone input channel n In the following example the remote control device unmutes all channels on the EF1210 with Device ID number 12 Then it mutes the microphone input on channel 4 and requests the mute status on channel 6 of the same EF1210 Acknowledgment mode is enabled Note Itis possible to use a wildcard for setting MUTEIn to 0 or 1 turning on off but not for querying or toggling 12 41 12 41 C12MUTEI5 C12MUTEI50 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE NCN ENABLE DISABLE NOISE CANCELLATION ON CHANNEL The noise cancellation feature improves the signal to noise ratio of the incoming microphone speech by either 6 or 10 dB The NCn command enables or disables this feature on the channel specified The NCLn command selects between 6 and 10 dB of noise cancellation Noise cancellation is applied to each microphone channel The factory default setting for NCn is 1 on Remote Commands The following commands can be sent by the remote control device to enable or dis able noise cancellation on channel n NCn0 Turn off noise cancellation on channel n nranges from to 8 Turn on noise cancellation on channel n Toggle noise cancellation on or off on channel n Request status of noise c
31. with the AUX IN LEVEL SETUP button AUX IN LEVEL SETUP Press and hold both this button and the INPUT SELECT button for 2 seconds to put the EF1210 into configuration mode Pressing the AUX IN LEVEL SETUP button again selects between configuration modes in the calibration process During normal operation press and hold the AUX IN LEVEL SETUP button and use the LEVEL ADJUST buttons to adjust the playback level of your program audio device REF SELECT BUTTON During normal operation this button selects which refer ence input AEC A or AEC B is shown on the REMOTE LEVEL INDICATOR Dur ing setup it has different functions depending on the setup step INPUT SELECT BUTTON During normal operation this button selects which one of the 8 input channels is shown on the INPUT SIGNAL LEVEL INDICATOR LED meter It is also used with the AUX IN LEVEL SETUP button to enter setup mode During setup it has different functions depending on the setup step SETUP LED Flashes to indicate the current setup step This LED is OFF during normal operation AEC A LED During normal operation this LED indicates if reference input A AEC A is selected for display on the REMOTE LEVEL INDICATOR During setup it has different functions depending on the setup step AEC B LED During normal operation this LED indicates if reference input B AEC is selected for display on the REMOTE LEVEL INDICATOR During setup it has different functions depending on the
32. 0 lt 8 1210 CODEC 82 D gt 5 ours 9 Mixer Optional Eg lt O gt ours 3 o 3 out I FROM TO o AEC REMOTE p cis aux ours REC iN A Logic Port 0990 0999 0999 cod Figure 17 Distance Learning using the EF1210 Distance learning classrooms are usually made up of the components shown in Figure 17 which include the EF1210 and the EF200 Phone Add Logic in out for a video camera to turn to the student talker should be implemented on the logic port of the auto mixer Microphone muting should likewise be implemented using the logic port of the auto mixer or muted by remote control on the EF1210 line levels outputs We recommend this so that the microphone is muted at the line out puts of the EF1210 or the input of the automixer which allows the microphone input to still be processed by the echo canceller in the EF1210 A useful option would be to provide the instructor with an RS 232 remote control device that will allow the instructor to mute student microphones using the EF1210 command set ASPI Digital The Sound of DSP Technical Support 404 892 3200 85 EF12 10 USER M ANUAL I EL
33. 210 COMMAND SET REFERENCE PO NG DEVICE RESPONSE TO PING COMMAND The PONG message is sent by the EF1210 in response toa PING command This can be used by the remote control device to find out what device IDs are used by EF1210s Also see the PING command Remote Commands The EF1210 will not recognize the PONG command You should only send the PING command from a remote control device EF1210 essages The following message is sent by the EF1210 when the remote control device sends it a PING command Response from EF device Example In the following example the remote control device sends the P ING command to find out what EF devices are on the bus One EF1210 and one EF200 returns a PONG message to announce their presence Acknowledgment mode is enabled ASPI Digital The Sound of DSP Technical Support 404 892 3200 83 EF1210 USER M ANUAL DEFAULT VALUES AND SAVED PARAMETER LIST 84 Note Parameters that are in bold print indicate those affected by a RESETF RESTNV or SAVENV command http ww w aspi com Copyright 1999 All Rights Reserved APPLICATIONS APPLICATIONS DISTANCE LEARNING re microphone ZONER AER FROM AEC REMOTE P O p OUT 3 amp s O gt ors Auto EF20
34. A input signal from the far end Using playback and record in the second zone of a multi zone 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 AUX IN and REC input and output respectively Ch3 E Ch4 gt ch5 P che t gt AEC AEC A D EF1210 Level f Line AEC AEC Amix To Aux Rec In CODEC In Helene Figure 7 Playback and Record in the EF1210 To record e Connect the REC output of the EF1210 to the audio input on the recording device e Connect AMIX IN to the output of the automixer or matrix mixer e Connect CODEC to FROM AEC on the EF200 or the input of the CODEC For playback e Connect the Aux IN of the EF1210 to the audio output of the playback device e Connect AMIX IN to the output of the automixer or matrix mixer ASPI Digital The Sound of DSP Technical Support 404 892 3200 23 24 EF1210 USER M ANUAL e Connect To CODEC to FROM AEC on the EF200 or the input of the CODEC Note When using the internal EF 1210 Record and Play circuitry sig nal being played back will NOT be recorded to avoid the potential of a feedback loop caused by the record playback device http www aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION F
35. C Reference Inputs 3 2 Press REF SELECT to select between AEC A and AEC B This will be indicated by the front panel AEC A and AEC B LEDs During this step all other LEDs INPUT CHANNEL will be extinguished 3 3 Have the person at the remote end of the conferencing link sit at a normal dis tance from a microphone and talk at a normal level while you observe the signal activity on the REMOTE SIGNAL LEVEL METER 3 4 Adjust the AEC Reference Input by pressing the LEVEL ADJUST buttons until the first yellow 0 dB LED lights regularly during normal speech at the remote end and the second yellow LED flickers occasionally 3 5 If you are calibrating two AEC Reference Inputs switch to the other by pressing REF SELECT and repeat the calibration for the second reference signal Caution If you skip this calibration step you will compromise the performance of the EF1210 The audio coming from the remote end may be too low so if you turn up the loud speaker to compensate the acoustic gain will be affected Refer to Figure 13 on page 33 CALIBRATIO N STEP 4 CALIBRATING FOR PLAYBACK AND RECORD 4 1 Once the AEC Reference Inputs have been calibrated press AUX IN LEVEL SETUP again to switch to Playback Record calibration For Calibration Step 4 the SETUP LED will blink four times per period This step calibrates the TO ASPI Digital The Sound of DSP Technical Support 404 892 3200 33 EF1210 USER M ANUAL CODEC signal No other calibra
36. Connects to an audio amplifier or powered loudspeaker in Zone A ZONE B Connects to an audio amplifier or powered loudspeaker in Zone B optional Technical Support 404 892 3200 13 How to Get Useful Information from the Signal Level M eters 14 EF1210 USER M ANUAL 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 INPUT signal level meter and the REMOTE signal level meter When configuring the input channels microphones 1 8 use the INPUT signal level meter When configuring the reference inputs AEC A and AEC B use the REMOTE signal level meter 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 sig nal levels and show them on the INPUT signal level meter Instead what is shown on the signal level meters is the individual signal level of the input 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 SELECT button Push the REF SELECT button to cycle through the two reference inputs Push the INPUT SELECT button to 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 chan nels are indicated by the LEDs label
37. EC to cancel echoes much below the noise floor While the EF1210 s superior noise cancellation subsystem can reduce the objectionable audible impact of high room noise to make the conferencing experience more enjoyable and less fatiguing in certain very harsh conditions this may mean that the residual echo is now more audible because the noise floor has been so dramati cally reduced Another difficult situation for the EF1210 arises when the room acoustic gain limit is approached or exceeded As the acoustic gain limit is approached it becomes more difficult for the EF1210 to adapt to level changes or movement in the room including normal conferencing participant movement movement of papers etc as a result of which snippets of echo may be heard for longer periods than would be desirable Should it be necessary to operate the EF1210 in such hostile conditions the echo sup pression performance of the EF1210 may be enhanced to remove any vestigial traces of echo at the expense of doubletalk performance In aggressive suppression mode users on the remote end will hear dropouts and clipping artifacts when they attempt to talk across a local participant The AECSn command may be used to select either normal suppression mode default or aggressive suppression mode if required by harsh room conditions The factory default setting for AECS n is 0 normal The following commands can be sent by the remote control device to set the suppres
38. ECHO FREE EF1210 M ULTI CHANNEL ACOUSTIC ECHO AND NOISE CANCELLER USER M 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 USER MANUAL T trod ction cba ad rct aep ao etu esso a tin 3 PVOCUCE Features e SUR UE Raed 4 Quick Install ati 5 ii beet ii epi be ad eite e fuus 6 Hardware Installation 5554 v re e ee een 6 GI C EH 6 EF1210 Calibration Quick Reference esee 8 Advanced Installation opi uae atate 10 Preparing for Installation eee eese entente ener 10 EF1210 Front and Rear Panels 12 Configuration eot eee ORE ERREUR med E 15 Connecting the EF1210 to other equipment esee 19 Calibr tion petet te t e e re UTR ROS Ee e dens 27 Calibrating With a Computer eese eee teet enne nnne 28 Calibrating Without a eee eene 28 Calibration Step 1 Calibrating Microphone Input Channels 29 Calibration Step 2 Calibrating Zone Outputs eese
39. EF1210 front panel is lit v Repeat for each input channel or click the Apply Gain to 11 button to apply the Input Gain to all input channels Return all microphones to their nor mal operating location and orientation Note It is vital to move the SPL meter and or microphones so that each microphone sees the correct dB SPL acoustic level as you are cal ibrating Do not assume that because the first microphone sees the dB SPL level all other microphones will see the same level unless they are moved to occupy the same location as the first Note Use caution if the microphones lie in two acoustically separated zones and you are only calibrating one zone As you cycle through microphones that lie in the other zone no activity will be indicated on the INPUT SIGNAL LEVEL METER on the EF1210 front panel vi After all input channels have been calibrated press the Next button at the bot A 8 http ww w aspi com Copyright 1999 All Rights Reserved CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE tom of the page to proceed to Zone Output calibration CALIBRATION STEP 2 CALIBRATING ZONE OUTPUTS For Calibration Step 2 the STEP INDICATOR will be lit in the second position This step sets the nominal output level of the ZONE Outputs to match your room audio equipment This step also lets you mark the maximum room loudspeaker amplification level permissible without violating the room acoustic gain limit g
40. EF1210 in response to a GAINC command or in response to any GAINC command when acknowledgment mode is on CODEC output gain is currently x dB In the following example the remote control device requests the current CODEC out put gain of the EF1210 with Device ID number 7 Then it sets a new level on the same EF1210 Acknowledgment mode is enabled CO7GAINC CO7GAINCO CO7GAINC4 CO7GAINC4 http www aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE GAININ SET MIC LINE INPUT GAIN ON CHANNEL N Remote Commands EF1210 M essages The GAINIn command sets the MIC LINE input gain level on channel n of the EF1210 to a level between 0 dB and 31 dB This corresponds to a nominal input sig nal level between 0 dBu to 31 dBu respectively for line level For mic level this corresponds to a nominal input signal level between 33 dBu to 64 dBu respectively Setting GAINIn to 0 corresponds to a nominal input signal level of 0 dBu line level or 33 dBu mic level Setting GAINIn to 31 corresponds to a lower nominal input signal level of 31 dBu line level or 64 mic level The purpose of the input channel gain is to bring the signal level of the input channel to a constant value at the A D inside the EF1210 For example if we expect a 10 dBu line level signal or 43 dBu mic level signal at the input of channel 2 we would set the input gain of channel 2 to 10 dB by sending the command GAINI210 If we expect
41. ER M ANUAL EF Device Selector EF Device Control Panel Pazscode al al aN Het lt na EXEC Figure 21 EF Device Selector on EFPanel This selector has two purposes 1 It displays a list of all EF Devices that are connected together via the ASPI Bus 2 It allows you to choose another EF Device to control Serial Port Page Allows you to choose the COM port that you are using on your computer Traffic Page Shows commands that are sent and received from the EF device About Page Displays version of EFPanel Control Software as well as version of code in the EF device A 4 http ww w aspi com Copyright 1999 All Rights Reserved THE EF1210 OPTIONS PAGE THE EF1210 OPTIONS PAGE EF Device Control Panel Paz code 2 zl d je Br ae Figure 22 EF1210 Options Page on EFPanel 1 FILE MENU This menu gives you options to load and save different saved con figurations You can open or save a configuration to a file restore factory default settings or restore a configuration from non volatile memory OPERATING Allows you to choose between two modes Echo and Noise Cancellation mode and Wideband Noise Cancellation mode When the EF1210 is in Wideband Noise Cancellation mode the AEC on every input channel is dis abled SIGNAL METERS Choose which input channel is displayed on the EF1210 front panel INPUT SIGNAL LEVEL INDICATOR an
42. G THE EF1210 WITHOUT RS 232 CONTROL Changing Level Display on mrur and Remote LED M eters Adjusting Volume in Zones Adjusting Playback Levels Muting Splitting zones When the EF1210 is in normal operating mode pushing the INPUT SELECT button will allow you to see levels of each input channel on the INPUT LED meter The green LED corresponding to an input channel will light if the levels of that channel are cur rently displayed on the INPUT LED meter In the same way pushing the REF SELECT button will allow you to see the levels of each reference input on the REMOTE LED meter A yellow LED will indicate which reference AEC A or AEC B is displayed on the meter The reference LEDs AEC A or AEC B do double duty They not only indicate which Reference Input is currently displayed on the REMOTE LED meter but also indicate which Zone Output is affected when the LEVEL ADJUST buttons are pressed The AEC A LED indicates that ZONE A s volume is being adjusted by the LEVEL ADJUST button The AEC B LED indicates that ZONE B s volume is being adjusted by the LEVEL ADJUST button The output levels can be adjusted up to 6 dB above and 12 dB below the nominal zone output level The nominal zone output level is 6 dB below the level selected in Calibration Step 2 Calibrating Zone Outputs The Aux IN input and REC output signals are preset to 10 dBV signal levels The level of the AUX IN signal may be adjusted during normal operation to compens
43. GA 30309 2439 404 892 3200 www echofree com Technical Support 404 892 3200 help aspi com EFPanelUM 0100 99 A 2 http www aspi com Copyright 1999 All Rights Reserved ABOUT EFPANEL CONTROL SOFTWARE ABOUT EFPANEL CONTROL SOFTWARE INSTALLING EFPANEL Install EFPanel by copying the executable EFPanel exe onto your hardrive Connect an RS 232 cable see the EF1210 User Manual or the EF200 User Manual for connector pinouts from the COM port on your computer to the RS 232 port on the EF device If you would like to control more than one EF device in your system use a category five twisted pair cable to connect the devices using the ASPI Bus Note 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 GETTING STARTED After installing EFPanel start the executable When the program is first started you may initially only see 3 tabs on the application the Serial Port Traffic and About pages Go to the Serial Port page by clicking on the tab labeled Serial Port Choose the appropriate COM port for your computer EFPANEL FEATURES FOR ALL EF DEVICES The following feature descriptions apply to EFPanel for all EF Devices Following this section are discussions of specific features that pertain only to specific EF Devices ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 3 EF1210 US
44. INTRODUCTION INTRODUCTION Congratulations How to Use This M anual Product Description Congratulations on your purchase of the EchoFree EF1210 Multi Channel Acous tic Echo and Noise Canceller By choosing ASPI Digital s EchoFree products you are investing in cutting edge DSP technology that will help provide the best possible 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 e Quick Installation gives an overview of the installation process including an out line 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 e Advanced Installation gives more detailed technical information on the installa tion configuration and calibration of the EF1210 e Operating the EF 1210 outlines using the EF1210 with and without RS 232 con trol e Troubleshooting helps to debug problems with installation e Technical Specifications provides the technical specifications of the EF1210 Warranty Information e 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 e Applications briefly descri
45. Input channel LEDs The AEC A or AEC B LED will illuminate to indicate the selected reference 5 3 Press the INPUT SELECT button to select the next input channel and select AEC A or AEC B as reference for that channel Continue until all eight input channels have been configured 5 4 You may now exit configuration mode and resume normal operation by pressing the AUX IN LEVEL SETUP button Refer to Figure 15 on page 35 Figure 15 Zone Reference Setup Note Once you enter setup from the front panel the configuration will be saved as the power on default once you exit setup If you wish to discard any changes you made you must cycle power on the EF1210 before you press the SETUP button to exit Setup ASPI Digital The Sound of DSP Technical Support 404 892 3200 35 EF1210 USER M ANUAL MOUNTING THE EF1210 Recommendation For Easy Access Instructions for Securing Power Supply to Back of EF1210 Thread power cable through cable clamp and attach to T EF1210 back panel for strain relief on the power wm Qe The EF1210 can be mounted in a rack enclosure using four large screws 10 32 x 1 2 included with the unit One EF1210 fits in a single rack space While not required it is prudent to leave a single rack space in between the EF1210 and other units in your rack This not only is a good design practice but also gives you easier access to the backpanel If you cannot leave a single rack space mount the EF1210 below
46. Registration PRODUCT FEATURES EF1210 USER M ANUAL 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 cancel lers it offers greater flexibility in loudspeaker and microphone placement Most echo cancellers can only operate properly at less than 0 dB of acoustic gain Breaking through this threshold can cause echoes and howling as loudspeaker levels overpower the microphones That can leave you with few options when designing audio or video 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 pat ented state logic algorithm ensures smooth and natural communications without typi cal speakerphone performance problems ASPI s proprietary noise cancellation on each of the inputs 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 i
47. Step a c When all input channels have been checked you can mark the positions of http ww w aspi com Copyright 1999 All Rights Reserved CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE the volume controls on the room audio amplifiers and note that this is the absolute maximum amplification that may be applied to room audio This maximum amplification will be referred to in this manual as the amplifier acoustic gain limit Note The volume control may be set at a lower level than this marked position amplifier acoustic gain limit but must not be set higher or the performance of the echo canceller will be suboptimal During normal operation the zone output levels will be set 6 dB lower than the selected level amplifier acoustic gain limit to allow the EFPanel Zone Volume Adjust to apply a volume adjustment to the room audio signal in the range 6 dB to 12 dB iv Once the Zone Output channels and room audio amplifier have been calibrated click on the Next button at the bottom of the page to begin the AEC Reference Input calibration CALIBRATION STEP 3 CALIBRATING AEC REFERENCE INPUTS For Calibration Step 3 the STEP INDICATOR will lit in the third position Note If you are configuring the EF 1210 for operation with AEC ref erence input you will calibrate the AEC A signal If you are configuring the EF 1210 for operation with two AEC ref erence inputs you will calibrate both the AEC A and th
48. TING ZONE O UTPUTS 2 1 Once all input channels have been calibrated press the AUX IN LEVEL SETUP button again to switch to Zone Output calibration For Calibration Step 2 the SETUP LED will blink twice per period This step sets the nominal output level of the Zone Outputs to match your room audio equipment This step also lets you mark the maximum room loudspeaker amplification level permissible without violating the room acoustic gain limit 30 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION STEP 2 6 press to select channel 1 check level LEDs light to LED blinks indicate which twice for Zone channel is selected calibration MUTE LEVEL AUXIN REF INPUT AEC AEC ALL ADJUST LEVEL SELECT SELECT SETUP STEP 2 6 adjust external amplifiers loudspeakers so that X CXXXOCO QOOOCO 9 e o 12 7 3 0 320dB 12 7 3 0 320 SETUP STEP 2 3a press STEP 2 3b STEP 2 2 XH noise to both zones recommended if amp expects press N if amp press to select consumer level expects 0 dBu noise source noise to zone no more than 3 green LEDs are lit repeat for each channel input 10 dBV balanced input Re B noise to zone Figure 12 Calibrating Zone outputs 2 2 Press the REF SELECT button to choose which output is being calibrated A nom inal level noise signal is played through the selected Zone output s e When the EF1210 first en
49. actory defaults Example In the following example the remote control device restores the factory default set tings of the EF1210 with Device ID number 12 The EF1210 sends back messages notifying the remote control device that the parameters have been reset to the factory standards C12RESETF Cl2RESETF ASPI Digital The Sound of DSP Technical Support 404 892 3200 75 EF1210 USER M ANUAL RESTNVM RESTORE SETTINGS FROM NON VOLATILE MEMORY IN MEMORY SLOT M Remote Commands EF1210 M essages Example 76 The RESTNVm command restores the EF1210 s settings to the user power up defaults stored in the non volatile memory This is useful for putting the EF1210 in its normal configuration after someone has changed the settings for a particular call See the SAVENVm command for information about saving the user defaults in non volatile memory When the RESTNVm command is sent to the EF1210 by the host the restore process begins When the restore process is complete the EF1210 sends the RESTNVm mes sage back to the host as an acknowledgment The variables that are saved as a result of this command are listed at the end of this document Refer to Default Values and Saved Parameter List on page 84 It is possible to restore one of four 0 3 previously saved configurations from mem ory See the SAVENVm command for a discussion of this feature The following command can be sent by the remote contr
50. al is such that if any microphone input channel registers more than three green LEDs on the EF1210 INPUT SIGNAL LEVEL METER the acoustic gain limit of that microphone channel has been reached This represents the maximum amplification that may be applied to the room audio The room audio may be run at any level below this threshold but should not be amplified beyond this level unless the acoustic gain is reduced by some other means See Acoustic Gain on page 44 All microphones should be checked in this step as verification that no micro phone inputs or zone outputs have been miscalibrated ASPI Digital The Sound of DSP Technical Support 404 892 3200 31 EF1210 USER M ANUAL As above both Zones can be adjusted at the same time both AEC A and AEC B LEDs will be lit indicating Zone A and Zone B This is recommended because you can check all Input Channels at the same time Alternatively if necessary you may select either Zone by pressing REF SELECT until the appropriate AEC LED is lit and check one Zone at a time Note You should start by selecting using the INPUT SELECT button and checking the microphone input channel which is closest to the loudspeakers or the microphone which might be expected to pick up the most acoustic energy from the loudspeaker audio as appro priate Check the acoustic gain of this microphone using Step 5 then quickly step through each of the microphone channels step 6 to verify that no other microp
51. ancellation on channel n EF1210 M essages The following messages are sent by the EF1210 in response to an NCn command or in response to any NCn command when acknowledgment mode is on Noise cancellation is currently off on channel n Noise cancellation is currently on on channel n Example In the following example the remote control device turns noise cancellation off on all channels on the EF1210 with Device ID number 12 Then it turns noise cancellation on on channel 1 and requests the noise cancellation status on channel 5 of the same EF1210 Acknowledgment mode is enabled Note Itis possible to use a wildcard for setting NCn to 0 or 1 turn ing on off but not for querying or toggling C12NC11 C12NC11 C12NC5 C12NC50 ASPI Digital The Sound of DSP Technical Support 404 892 3200 71 EF1210 USER M ANUAL NCLN SET NOISE CANCELLATION LEVEL ON CHANNEL N Remote Commands EF1210 Messages Example 72 The noise cancellation feature improves the signal to noise ratio of the incoming microphone speech by either 6 or 10 dB The NCn command enables or disables this feature on the channel specified The NCLn command selects between 6 and 10 dB of noise cancellation Noise cancellation is applied to each microphone channel The factory default setting for NCLn is 10 normal The following commands can be sent by the remote control device to change the noise cancellation level Set noise cancellation
52. ate for low or high audio level from an external playback device 1 During normal operation press and hold the Aux IN LEVEL SETUP button while using the LEVEL ADJUST buttons to adjust the level of the playback signal The level adjusted Aux IN signal is mixed with the AMIX IN signal nominally OdBu and sent to the To CODEC connector It is also mixed with the AEC A signal and played over the Zone A output To mute channels while using the EF1210 without RS 232 control for push to talk microphones for example we suggest using the mute control capability on the mixer rather than using a microphone with mute built inside it The AEC will perform bet ter using this method because it allows the speech to be processed inside the EF1210 before being muted instead of totally cutting off the speech so that the AEC has to readapt when the microphone comes on again Calibrate using calibration procedures When using more than one zone refer to Calibration Step 5 Zone Reference Setup on page 34 to associate each microphone input channel with a reference If you are using two reference signals Reference A and Reference B Input Channel 1 must be associated with Reference A AEC A and Input Channel 8 must be associated with Reference B AEC B The other 6 microphones can be associated with either reference 38 http ww w aspi com Copyright 1999 All Rights Reserved OPERATING THE EF1210 USING THE EF1210 WITH RS 232 CONTROL You can
53. bes using the EF1210 in different applications e EFI1210 Block Diagram e Connector Pinouts e Connecting Balanced Equipment to Unbalanced Equipment 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 ven dors 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 conver gence rate is a direct indication of the product s quality Faster convergence allows better conference quality by instantly adapting to changing 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 ASPI Digital The Sound of DSP Technical Support 404 892 3200 3 Warranty
54. commands that have a visible impact like the MUTEI command muting all channels will cause the MUTE ALL LED to light Also look for messages from the EF1210 like acknowledgment or error messages if the remote control device can display them ASPI Digital The Sound of DSP Technical Support 404 892 3200 47 Check Command Syntax Check Device ID Check RS 232 EF1210 USER M ANUAL Make sure the commands that are being sent to the EF1210 have the correct syntax If only a couple of the commands aren t being processed there may be an error in the syntax of those commands Remember the commands are case sensitive Com mands should be typed with all capital letters The EF1210 should return ERROR messages if the commands are typed incorrectly as long as error messages are enabled Make sure the Device ID of the EF1210 matches the Device ID of the commands that are being sent If they don t match the EF1210 will ignore all the commands Try sending a command to all devices instead of Device Type and Device ID If this works but sending commands to a specific device doesn t the Device ID doesn t match Make sure the RS 232 cable is connected securely to the EF1210 and the remote con trol device Also the RS 232 port on the remote control device should be set to 9600 8 N 1 CONTACTING TECHNICAL SUPPORT 48 If these troubleshooting guidelines don t resolve the problem you are experiencing with the EF1210 p
55. control all of the EF1210 s features with an RS 232 remote control device The instructions below explain which RS 232 commands are needed to accomplish each function Users may not need to know these commands since they may be hid den behind the user interface of the remote control device A full Command Set Ref erence is provided at the end of this manual starting on page 53 Serial Port Setup For RS 232 control use an RS 232 cable do not use a null modem Refer to nector Pinouts on page 88 for pin connections for the RS 232 cable The RS 232 port on the remote control device should be set to 9600 8 N 1 Changing Level When the EF1210 is in normal operating mode the input channel level displayed on 5 play Display on Input and the INPUT LED meter can be checked and adjusted using the following commands Remote LED M eters from the RS 232 command set Set front panel The level of input channel n will be INPUT LED meterto displayed on the INPUT LED meter display input chan and the green LED of the channel will nel n light Request current The EF1210 returns channel n which assignment of front indicates that the front panel INPUT panel INPUT LED LED meter is currently set to display meter input channel n n ranges from 1 to 8 When the EF1210 is in normal operating mode the Reference Input level displayed on the REMOTE LED meter can be checked and adjusted using the following com
56. d which Reference input is displayed on the REMOTE SIGNAL LEVEL INDICATOR VOLUME ADJUST Allows you to adjust volumes on Zone outputs Playback and To CODEC levels SETUP BUTTON This button will put the EF1210 in setup mode and display the first page used for calibration EF DEVICE SELECTOR This option shows all the EF devices that are connected via the ASPI Bus and also allows you to choose another EF device to control FRONT PANEL LOCKOUT This option locks the front panel so that any button pushed on the EF1210 will have no effect EF1210 CALIBRATION STEP INDICATOR Each block in this indicator indicates a ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 5 A 6 EF1210 USER M ANUAL different calibration step For each calibration step the appropriate block will light up in blue PER CHANNEL OPERATION This section allows you to set the noise cancellation set suppression mode mute input channels and turn the AEC on or off either individually or applied to all channels at the same time http www aspi com Copyright 1999 All Rights Reserved CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE To Start EF1210 Calibration Note To calibrate the EF 1210 using the EFPanel control software you need to be able to see the EF 1210 front panel LED meters If you would like to exit Setup mode at any time click on the Cancel button All origina
57. dB 12 7 3 032 SETUP STEP 1 7 adjust 1 7 level until 3 green A and 1 yellow LEDs STEP 1 2 press to x pink noise to both zones noise level are lit repeat for select noise source Q Q no noise generated measured at mic each channel 1 should be at the XS pink noise to zone A appropriate SPL Xl pink noise to zone B level from Table 3 Figure 11 Calibrating Mic Inputs 1 2 If necessary press the REF SELECT button to select which zone the pink noise is being played in e When you first enter configuration mode pink noise is played in both Zone A and Zone B e Press REF SELECT for no pink noise in Zone A or Zone B e Press REF SELECT again for pink noise in Zone e Press REF SELECT again for pink noise in Zone B e Repeated pressing of REF SELECT will cycle through these four modes See Figure 11 on page 29 1 3 Press the INPUT SELECT button to choose the input channel 1 4 Set the SPL meter Sound Level Meter to C weighted slow response Choose the appropriate dB SPL range using Table 4 below based on microphone type and the talker s distance from the microphone MICROPHONE TYPE TYPICAL DISTANCE FROM SPL LEVEL TALKER FT dB Lavalier 6inchestolfoot inches to 1 foot S9dBSPL dB SPL Boundary or other tabletop 73 dB SPL Table 4 Typical distance from microphone to talker and appropriate dB SPL level 1 5 Place the SPL meter beside the microphone Point the SPL meter and the micro
58. e Connector Pinouts on page 88 for pinouts e Connect each of the 8 LINE OUTPUTS to the inputs of an automixer or matrix mixer Each LINE OUTPUT uses a mini Phoenix connector Caution set mixer inputs to 0 dBu line level phantom power OFF e Connect the zone output ZONE or ZONE B to an amplifier or powered loud speaker e Connect the reference input AEC A AEC B to To AEC on the EF200 con nect only one reference per EF200 or to the output of the CODEC e Connect the output of your automixer to FROM AEC on the EF200 or to the input of your CODEC e f RS 232 remote control is desired connect the RS 232 REMOTE CONTROL port of the EF1210 to the remote control device such as an RS 232 interface to a touch panel or a COM port on a personal computer Connect the ASPI Bus OUT on the EF1210 to the ASPI Bus IN on the EF200 if you are using an EF200 ASPI Digital The Sound of DSP Technical Support 404 892 3200 21 EF1210 USER M ANUAL Playback Record 22 Phone Add Note The external RS 232 control device may be connected to any ASPI device to control all ASPI devices that are linked via the ASPI Bus e Connect the external power supply to the POWER SUPPLY INPUT jack of the EF1210 The EF1210 provides the capability to record and play back audio to your conference Playback allows you to play the audio output of an external device such as a televi sion or VCR to the conference Record allows you to
59. e it gets an acknowledg ment LINE C23ACKMOD1 C23ACKMOD1 C23NCO C23NCO C23NC2 C23NC1 ASPI Digital The Sound of DSP Technical Support 404 892 3200 57 EF1210 USER M ANUAL AECN ENABLE DISABLE ACOUSTIC ECHO CANCELLER ON CHANNEL N Remote Commands EF1210 Messages Example 58 The acoustic echo canceller is the heart of the EF1210 which eliminates echoes and acoustic feedback that occur when loudspeaker audio is picked up by room micro phones The only instance when you may want to use this command is when you put the EF1210 into wideband noise cancellation mode which can only be enabled if the AEC is disabled on each channel The factory default setting for AECn is 1 on The following commands can be sent by the remote control device to enable or dis able acoustic echo cancellation AECnO Turn off AEC on channel n n ranges from 1 to 8 Turn on AEC on channel n Toggle AEC on or off for channel n Request AEC status for channel n The following messages are sent by the EF1210 in response to an AECn command or in response to any AEC command when acknowledgment mode is on AEC is currently off on channel n AEC is currently on on channel n In the following example the remote control device disables the AEC on all channels on the EF1210 with Device ID number 7 Then it enables the AEC on channel 2 and requests the AEC status on channel 6 of the same EF1210 Acknowledgment m
60. e AEC B signals ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 11 EF1210 USER M ANUAL g EF Device Control Panel File View Passcodes Setup EF1210 3 CALIBRATE REFERENCE INPUT S 11 Select Reference Input Source to Calibrate C Reference B ii Establish Live Connection To Remote Site s And Have Remote Party Talk Normally r iii Adjust Until First Yellow LED on REMOTE Meter Is Flickering Regularly and the Second Y ellow LED is Flickering Rarely Reference Input Gain dB 4 4 lt Back Next gt Cancel Finis 4 For Help press F1 Figure 25 Step 3 Calibrating AEC Reference Inputs For this step you will need a live connection to a remote conferencing site or two sites if you are configuring the EF1210 for two AEC reference inputs i Select Reference input source to calibrate Choose either Reference A AEC A or Reference AEC ii Establish live connection to remote site s and have the remote party talk nor mally Have the person at the remote end of the conferencing link sit at a normal distance from a microphone and talk at a normal level while you observe the sig nal activity on the REMOTE SIGNAL LEVEL METER Note If you have an EF200 Phone Add in your system you can easily establish a remote connection using the EF Panel Control Software by choosing the EF 200 device from the Device List in the T
61. e ASPI devices connect them using the ASPI Bus ports See Connecting the ASPI Bus on page 26 4 Connect the external power supply Caution The EF1210 is designed to maintain a 1 4 6 35 mm air circula tion 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 impede air circulation around the EF1210 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 Cal ibration procedure by reading Calibration on page 27 For front panel calibration enter Calibration mode by pressing and holding the AUX IN LEVEL SETUP and INPUT SELECT front panel buttons for 2 seconds In Calibration mode the SETUP LED will blink to let you know which setup step you are currently executing Press the AUX IN LEVEL SETUP button to move from one Calibration step to the next When you have finished Calibration step 5 press the AUX IN LEVEL SETUP button again to exit Calibration mode any changes that you made wil
62. e ID is a two digit decimal number indicating the Device ID number of a specific device This is the same Device ID that is set by the rear panel DIP switches on the EF1210 The Device ID must always have two digits so if the ID is less than ten a leading zero is needed For example the Device ID for unit six is 06 Each EF1210 in a system should have a different Device ID so they can each be addressed individually It s ok for an EF1210 to have the same Device ID as a differ ent ASPI Digital product such as an EF200 Phone Add because they will be differen tiated by the device type On the EF1210 the Device ID can be a 2 digit number from 00 to 31 ASPI Digital The Sound of DSP Technical Support 404 892 3200 53 Command name Channel number Command data Sending commands to multiple devices Example 54 EF1210 USER M ANUAL The command name is a unique string of characters that indicates which command the EF1210 should execute Command names for different products are not necessar ily the same since the function and features of each product are different A list of available EF1210 command names is shown in Table 5 on page 55 The channel number indicates which input channel reference input zone output or memory slot the command is being applied to It is not included in all commands Only commands that need to be applied individually such as the AEC command include the channel number Microphone input chan
63. eck all Input Channels at the same time Alternatively if necessary you may select either Zone by pressing REF SELECT until the appropriate AEC LED is lit and check one Zone at a time You should start by selecting from the radio buttons labeled 1 through 8 and checking the microphone input channel which is closest to the loudspeakers or the microphone which might be expected to pick up the most acoustic energy from the loudspeaker audio as appropriate Check the acoustic gain of this microphone using Step a then quickly step through each of the microphone channels to verify that no other microphone has a stronger signal Check and make adjustments for acoustic gain by doing the following a Adjust the external room audio amplifiers loudspeakers until either e The loudspeaker audio level is about to become uncomfortably loud OR e Three green LEDs on the EF1210 INPUT SIGNAL LEVEL METER are lit but the first yellow 0 dB LED is not lit for the chosen input channel b Next step through the microphone input channels by choosing each input channel from the radio buttons labeled 1 through 8 while verifying for each channel that the first yellow 0 dB LED is not lit on the INPUT SIGNAL LEVEL METER e fthe first yellow 0 dB LED is lit for any channel turn down the room audio amplifier on the corresponding zone output or turn down the gain on that microphone channel Note Do not turn up the room audio level at any point after
64. ed CHANNELS 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 http www aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION CONFIGURATION Configure the DIP Switches ON Figure 2 DIP Switches on EF1210 Back Panel Note When the DIP switch is down as shown in the diagram in Figure 2 itis 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 FT NOKO Sosa 5 5 5955550800009 CE eS UUDUD lt lt lt 9 lt 0 LINE LINE LINE LINE LINE 5e mie or Tne Tevel Torinpn Zon te EFRO 1 planom power for microphone 2 See ASPI Digital The Sound of DSP PHANTOM3 Set phantom power for microphone 3 See Caution below 4 LINE Sets mic or line level for input 4 on the EF1210 Mic 5 8 LINE 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 cab
65. em with the acoustic gain on that microphone channel If this excessive coupling activity level is evident on only one microphone input chan nel that microphone channel should either be redirected to reduce coupling to loud speaker audio or recalibrated as it will need to be turned down If the excessive coupling activity is observed on all or most microphone channels then this indicates either that the room audio is too loud or the reference signal may need to be recali brated this will be indicated by observing low activity levels on the REMOTE SIGNAL LEVEL METER Note Before you readjust the Remote input levels check to make sure you are looking at the correct remote input level AEC A or AEC B on the REMOTE LEVEL INDICATOR Check to make sure that the microphone that you are looking at is in the zone that you think it is in and that you are looking at the correct channel on the INPUT LEVEL INDICATOR For the EF1210 to adapt effectively saturation overload or clipping must not occur at the A D converter supplying the microphone input Saturation introduces nonlin ear signal distortions into what the AEC expects is a linearly echoed version of the remote speech Nonlinear distortion causes a degradation or divergence of the AEC s internal model of the room acoustics In this situation the EF1210 cannot effectively cancel room echoes and a substantial amount of echo may be heard by the remote party Excessive micropho
66. ets the front panel REMOTE meter to display reference input channel c of the EF1210 The factory default setting for SELECTRc is A Reference A Remote Commands The following commands can be sent by the remote control device to set the front panel REMOTE meter to display reference input channel c 1 Set front panel REMOTE meter to display reference input channel c c is either A or B Request current assignment of front panel REMOTE meter EF1210 M essages The following messages are sent by the EF1210 in response to SELECTR com mand or in response to any SELECTRc command when acknowledgment mode is on SELECTRc Front panel REMOTE meter is currently set to dis play reference input channel c Example In the following example the remote control device requests the current reference channel displayed on the REMOTE meter of the EF1210 with Device ID number 7 Then it sets channel 5 to be displayed on the REMOTE meter of the same EF1210 Acknowledgment mode is enabled Remote Command EF1210 Message 1 CO7SELECTR CO7SEL CO7SELECTRS CO7SELECTRS ASPI Digital The Sound of DSP Technical Support 404 892 3200 79 EF1210 USER M ANUAL SR CHANGE THE SAMPLE RATE Remote Commands EF1210 Messages Example 80 The SR command changes the sample rate of the EF1210 SR16 16 kHz is the normal operating
67. evices of a certain type For example P ING queries all devices on the bus while C P ING queries all EF1210s on the bus The following command can be sent by the remote control device to find out what devices are connected to the ASPI Bus PING Requests a PONG message from the device The EF1210 never sends a PING message but will send a PONG message in response to one see PONG In the following example the remote control device requests a PONG message from all EF1210s on the ASPI Bus Two EF1210s respond C12PONG C14PONG ASPI Digital The Sound of DSP Technical Support 404 892 3200 73 EF1210 USER M ANUAL REFASGNNC AEC REFERENCE ASSIGNM ENT Remote Commands EF1210 Messages Example 74 The REFASGNnc command assigns reference c to input channel n of the EF1210 The factory default setting for REFASGNnc is A Reference Input A The following commands can be sent by the remote control device to change the ref erence channel assignment EFASGNnc Assign reference c to channel n c ranges either A or B n ranges from 1 to 8 EFASGNn Request reference assignment of channel n Note The wildcard character is not allowed for specifying the chan nel number n for the REFASGNnc command The following messages are sent by the EF1210 in response to an REFASGNn com mand or in response to any REFASGNn command when acknowledgment mode is on EF1210 Message Message
68. eypad on a computer keyboard to type the phone number The phone number that are dial ing appears in the status bar of EFPanel FLASH This button works much like the flash button on many telephones used for call waiting features When the phone is off hook clicking this button will hang up the EF200 putting it on hook then immediately pick it up again off hook As this is happening the PHONE CONNECT LED on the EF200 front panel will turn off phone on hook then turn on again phone off hook again REDIAL This button redials the last phone number that you dialed PRIVACY MUTE This mutes or unmutes the audio going to the remote end and to the phone from the EF200 This has the same effect as the PRIVACY but ton on the EF200 front panel and will light the PRIVACY ON LED when enabled PHONE Book This will take you to the Phone Book page of EFPanel for the EF200 REMOTE CONNECTED DISCONNECTED This button connects or disconnects the audio paths going to and from the remote end It has the same effect as pushing the REMOTE BUTTON on the front panel of the EF200 ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 17 EF1210 USER M ANUAL PHONE BOOK G3 EF Device Control Panel File View Passcodes Serial Port Traffic About Dialer Phone Book Options Name Phone Number Digital 409 892 3200 ASPI Digital 404 892 3200 Did HangUp Add Et Delete EF200 01
69. fire flood lightning acts of God or use in those countries where such use violates Part 779 of the Export Administration Regulations of the United States Department of Commerce If your ASPI Digital product is not covered by our warranty call us at 404 892 3200 or fax us at 404 892 2512 for advice about whether we will repair your ASPI Digital product and for other repair information including charges ASPI Digital in its sole discretion may replace rather than repair your ASPI Digital product with a new or reconditioned one of the same or similar design The repair or replacement is war ranted for 90 days The limited warranties and remedies set forth above are exclusive and in lieu of all other warranties whether oral or written express or implied ASPI Digital specifi cally disclaims any and all implied warranties including without limitation the war ranties of merchantability and fitness for a particular purpose This product contains no user serviceable parts Please contact ASPI Digital for repairs Attempts to repair this product by an unauthorized technician will void your warranty This limited warranty gives you specific legal rights and you amy have other rights that may vary from state to state http www aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE EF1210 COMMAND SET REFERENCE The EF1210 Command Set is used to control an EF 1210 using an RS 232 remote control device s
70. h channel 8 will be used as Zone B output Microphones on the input channels must be placed in the sound field of the appropriate Zone output for the EF1210 to operate correctly other wise echoes will not be cancelled In other words if for example the microphone on channel 3 is in the soundfield of the loudspeaker connected to the Zone B out 34 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION put channel 3 must be configured to use Reference AEC as its reference Note If you are using only one reference signal Reference A all microphones must be configured to use that reference signal If you are using two reference signals Reference A and Reference B Input Channel 1 must be associated with Reference A AEC A and Input Channel 8 must be associated with Reference B AEC B The other 6 microphones can be associated with either refer ence STEP 5 3 press to select channel for s calibration Se LEDs light to LED blinks indicate which five times for channel is selected zone ref setup S POWER INPUT REMOTE E m A o Cen Ee REESE sup AEC AC 1 2 3 4 5 6 7 8 X COOOOO COOOOCO oF e 12 7 3 0 3 20dB 12 7 3 0320 SETUP STEP 5 2 press to X T zone A selected select reference zone Xl zone B selected 5 2 Use the REF SELECT button to select an AEC Reference AEC A or AEC B to be used with the channel indicated by the
71. he loudspeaker They are distorted copies of this sig nal The EF1210 cannot effectively cancel this distorted signal If you suspect the loudspeaker is introducing nonlinearities into the room acoustic path take these steps to minimize its influence on the echo canceller e Keep the loudspeaker s volume level at less than three eighths of full scale If higher volume is required the EF1210 should operate effectively at volume set tings of up to 50 percent of full scale At more than 50 percent most audio sys tems and loudspeakers introduce significant nonlinearities The EF1210 may not adapt under these conditions and echoes may be heard e the loudspeaker has a bass control lower it Excessive bass can cause a boomy effect that is nonlinear In addition excessive bass may cause substantial mechanical coupling to the microphone through vibrations induced in the hous ings and support structures e Increase the separation distance between microphones and the loudspeaker The EF1210 handles up to 10 dB of acoustic gain between the loudspeaker and the microphone You may be exceeding this limit if the loudspeaker is pointed directly at the microphones or if the loudspeaker volume is excessive loud speaker placement is not critical but it should not be pointed directly at the microphones REMOTE CONTROL PROBLEMS If the remote control device doesn t seem to be affecting the EF1210 there are a few things you can check Try sending
72. hone has a stronger signal Adjust the external room audio amplifiers loudspeakers until either loudspeaker audio level is about to become uncomfortably loud OR e Three green LEDs on the EF1210 INPUT SIGNAL LEVEL METER are lit but the first yellow 0 dB LED is not lit for the chosen input channel 2 6 Next step through the microphone input channels by pressing the INPUT SELECT button while verifying for each channel that the first yellow 0 dB LED is not lit on the INPUT SIGNAL LEVEL METER e fthe first yellow 0 dB LED is lit for any channel turn down the room audio amplifier on the corresponding Zone Output or turn down the gain on that microphone channel Note Do not turn up the room audio level at any point after Step 5 2 7 When all input channels have been checked you can mark the positions of the volume controls on the room audio amplifiers and note that this is the absolute maximum amplification that may be applied to room audio This maximum amplification will be referred to in this manual as the amplifier acoustic gain limit Note The volume control may be set at a lower level than this marked position amplifier acoustic gain limit but must not be set higher or the performance of the echo canceller will be suboptimal During normal operation the zone output levels will be set 6 dB lower than the selected level amplifier acoustic gain limit to allow the EF1210 LEVEL ADJUST con trols t
73. ics and sensitivity of the microphone You only need to perform this cali bration at the initial installation You do not have to calibrate the EF1210 each time it is used Note 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 cali brated correctly the EF1210 easily and automatically handles any type of signals and changes in room acoustics to provide unparal leled echo cancellation performance Note If you decide to use a different kind of microphone once the EF 1210 has been calibrated the microphone inputs on the EF1210 will be need to be recalibrated Calibration Steps e Calibration Step 1 Calibrating Microphone Input Channels page 29 e Calibration Step 2 Calibrating Zone Outputs Check Acoustic Gain page 30 e Calibration Step 3 Calibrating AEC Reference Inputs page 32 e 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 e Calibration Step 5 Zone Reference Setup page 34 Acoustic Gain 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 amplification but must not be set higher Too much acoustic gai
74. igure 8 on page 25 depicts connections on the EF1210 for record and playback 908 0g Remote Control System Optional ASPI BUSIN 8 microphones EF1210 8999868868999999888 aly 45 415 VOC MIC LINEINPUTS AEC REF Aux 2 4 E AECA 1 LINE OUTPUTS To zole zone 50 3 45 7 VU al efron Record Output Play Input 8 Line Level Signals Output to EF200 optional or CODEC Automatic Microphone Mixer 0000 ox BOE ASPI Bus Connection for RS 232 Con EF200 Phone Add Optional 545 VOC FROM REMOTE REMOTE x MEE COUR TO PHONE scs Eum mita Oe g ies Bp ad mn cee 85 8 E Record and Play Devices Figure 8 EF1210 Connections for Record and Playback ASPI Digital The Sound of DSP Technical Support 404 892 3200 00 CODEC hybrid 00 25 EF1210 USER M ANUAL Connecting M ultiple EF1210s Multiple EF1210s can be easily connected together to add more zones or micro phones to your setup The ASPI Bus allows multiple devices to be controlled by a single RS 232 c
75. is plugged into the appropriate MIC LINE INPUT ASPI Digital The Sound of DSP Technical Support 404 892 3200 43 RESIDUAL ECHO Reverberation vs Echo Finding the Source of Echo Acoustic Gain 44 EF1210 USER M ANUAL You may hear residual echo if system levels are not set properly Improper level set tings anywhere in the audio path can introduce nonlinearities that hamper the opera tion of the EF1210 If you hear residual echo one of the following conditions may be causing the problem Do not confuse the residual echo of remote speech with the reverberation of local speech Reverberation of local speech is caused when the speech signal arrives at the microphone via several paths the direct path and multiple reflections from surfaces in the room This is a local room phenomenon that gives the talker s voice a hollow or resonant sound as heard at the remote end Reverberation is not an artifact of the echo canceller It is mainly affected by the dis tance of the microphone from the speech source and by the resonances of the room While reverberation can be unpleasant it is not compensated for by the AEC which only removes reflections of remote speech If the remote end complains that they hear echo ensure that they are referring to hearing their own voice and not echoes of local talkers You cannot remove the effects of reverberation by changing the EF1210 s settings but you can minimize reverberation by moving mic
76. is securely located such that it can not become dislodged and fall Such a fall could cause personal injury or equipment failure When mounting an EF 1210 in a rack consideration should be given to airflow and operating ambient temperatures inside the rack To ensure safe operation of the EF 1210 ambient operating temperatures inside the rack should not exceed 50 degrees Cel sius Allow 2 inches of open space in front of the EF1210 two inches on either side and four inches behind the unit for proper ventilation Equipment should not be installed in the rack in such a way as to interfere with the ventilation of the EF1210 The EF1210 enclosure is designed to maintain a 1 4 clearance above the top of the unit Do not install or stack EF1210s in such a way as to defeat this clearance Do not block the vents on the sides of the EF1210 Consideration should be given to the connection of the equip ment to the supply circuit and the effect that overloading of cir cuits could have an overcurrent protection and supply wiring Appropriate consideration of equipment nameplate ratings should be used when addressing this concern Reliable earthing of rack mounted equipment should be main tained Particular attention should be given to supply connections other than direct connection to the Branch use of power strips ASPI Digital The Sound of DSP Technical Support 404 892 3200 37 EF1210 USER M ANUAL O PERATING THE EF1210 USIN
77. ith 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 or 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 Switch 16 Switch 17 Switch 18 Switch 19 Switch 20 Device ID 16 D ID 8 I ID 4 ae ID 2 M ID 1 ASPI Digital The Sound of DSP Technical Support 404 892 3200 17 18 http www aspi com EF1210 USER M ANUAL Copyright 1999 All Rights Reserved ADVANCED INSTALLATION CONNECTING THE EF1210 TO OTHER EQUIPMENT Overview 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 zone out put ZONE A or ZONE B Remote input is the reference input AEC A or AEC B and the remote output is the LINE OUTPUT Caution Set mixer inputs to 0 dBu line level phantom power OFF pi CH1 CH2 CH3 CH7 nnn CH8 ZONEA AECA EF1210 OUT 1 OUT OUT OUT 4 OUTS OUT 6 OUT 7 OUT 8 r gt gt gt l Auto Mixer AEC
78. l FRONT PANEL Lock Lock unlock front panel enables disables front panel but tons GENERATE RING TONES Enable disable ring tones GENERATE ENTRY TONES Enable disable entry and exit tones LINE ECHO CANCELLER Enable disable line echo cancellation MUTE REMOTE OuTPUT Mutes unmutes audio going to the remote end from the EF200 MUTE PHONE OUTPUT Mutes unmutes all signals going to the phone interface NOISE SUPPRESSION Enables disables noise suppression e NORMAL Set noise suppression level to 10 dB CONSERVATIVE Set noise suppression level to 6 dB PHONE INPUT GAIN SLIDER Set phone input gain This slider is disabled if auto matic gain control AGC is ON PHONE OUTPUT GAIN SLIDER This controls the level to the phone DTMF DETECTION Enable disable DTMF detection DTMF CLAMPING Enable disable DTMF clamping DTMF clamping reduces the received tone level Technical Support 404 892 3200 A 19 EF1210 USER M ANUAL e ENABLE COMMANDS Enable disable a series of built in commands trig gered by DTMF digits The built in commands are listed in Table 8 below All commands start with the number 0 and end with a character For each com mand you specify a two digit command code plus a payload Table 8 Built in DTMF commands CODE COMMAND NAME PAYLOAD OPTIONS D For example to turn PRIVACY on you would press OPR1 which corresponds to 0771 To turn noise suppression off you would
79. l be saved as the default power on settings when you exit the Calibration procedure http www aspi com Copyright 1999 All Rights Reserved QUICK INSTALLATION If you miss a Calibration step or lose your place and get to the wrong Calibration step you may either continue and come back to the missed step later or exit Calibration mode by pressing AUX IN LEVEL SETUP repeatedly until the SETUP 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 ASPI Digital The Sound of DSP Technical Support 404 892 3200 7 EF1210 CALIBRATION QUICK REFERENCE Legend LED Blinking o Button Xj usos Calibration Step 1 Calibrating M icrophone Input Channels EF1210 USER M ANUAL 1 1 Press and hold the AUX IN 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
80. l settings before you entered Setup will be restored As you calibrate the EF1210 you can use the EF1210 Calibration STEP INDICATOR on the EFPanel Toolbar see Figure 22 on page 5 to help keep track of which calibra tion mode you are in Click on the Setup button see Figure 22 on page 5 to enter configuration mode of the EF1210 CALIBRATION STEP 1 CALIBRATING MICROPHONE INPUT CHANNELS For Calibration Step 1 the STEP INDICATOR will be lit in the first position EF Device Control Panel cb xl File View Passcodes Help 1 CALIBRATE MIC LINE INPUT CHANNELS 11 Select Pink Noise Output Source BOTH Zones r ii Select Input Channel To Calibrate ME MIL ML ME r iii Adjust Mic Loudspeaker for 73 dB SPL Measured At Mic See Manual For More Details r iv Adjust Gain Until First Yellow LED on Input Meter Is Lit Input Gain dB 13 r v Repeat For Each Input Channel OR Click Button Below Apply Gain To All Back Next gt Finish 1210 03 For Help press F1 Figure 23 Calibration Step 1 Calibrating Microphone Inputs i Select pink noise output source This is the Zone that will output pink noise for microphone calibration ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 7 EF1210 USER M ANUAL The default choice is pink noise played in both Zone A and Zone B Choose No noise generated fo
81. lease check our web site http www aspi com for the most cur rent technical support information go to Technical Resources then to Technical Sup port If you have further questions please contact us at Applications Engineering ASPI Digital 1720 Peachtree St NW Suite 220 Atlanta 30309 2439 Phone 404 892 3200 Fax 404 892 2512 Email help aspi com Before contacting us please review the warranty and repair policy on page 51 http www aspi com Copyright 1999 All Rights Reserved TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS MECHANICAL SPECIFICATIONS Dimensions Weight Connectors ELECTRICAL SPECIFICATIONS Power Power Consumption Phantom Power Microphone Input AEC Reference Input Line Output Zone Output Automixer Input CODEC Output Playback Input Record Output Input Impedance Output Impedance Headroom PERFORMANCE SPECIFICATIONS Frequency Response Echo Cancellation Span Total Cancellation Convergence Rate Noise Cancellation COMPLIANCE 19 483 mm W x 8 2 208 mm L x 1 75 45 mm H full rack unit 5 516 Audio Mini 3 5mm quick connect terminal blocks RS 232 DB9F ASPI Bus In Out RJ45 100 240 VAC 50 60 Hz 40 W 28 V 30 dBu to 0 dBu 66 dBu to 33 dBu nominal Range is rear panel switch selectable 20 dBu to 0 dBu nominal software adjustable 0 dBu nominal 10 dBV 8 dBu or 0 dBu nominal selectable 6 to 12 dB via front
82. les to inputs Switch 9 in Line position allows 0 4 microphone inputs switch 9 in Mic position allows 4 8 microphone inputs Sets phantom power for microphone 5 See Caution below Table 1 DIP Switch configuration Technical Support 404 892 3200 2 LINE PHANTOM 2 PHANTOM 3 Mic 4 LINE HANTOM 4 8 PHanTom4 Sets phantom power for microphone 4 See Caution below 15 EF1210 USER M ANUAL Fr Hemos pinon power Tor micophons See Cain ie pmemur si pion poner for Se Canton sow Hr mens ened maan eeo mo preme His prema setez O Table 1 DIP Switch configuration 1 Caution Phantom power should be turned OFF unless you are using a microphone that requires phantom power 16 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION Device ID 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 w
83. lly controlled analog trimpots e Phoenix connectors for audio input and output e Single rack unit width and height http www aspi com Copyright 1999 All Rights Reserved INTRODUCTION e Pink noise generator for calibration mode e 2 year warranty ASPI Digital The Sound of DSP Technical Support 404 892 3200 EF1210 USER M ANUAL QUICK INSTALLATION Installation of the EF1210 involves two procedures hardware installation and cali bration HARDWARE INSTALLATION 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 equip ment on page 19 e Connect the 8 Mic Line Inputs to microphones e Connect the 8 Line Outputs to the inputs of a mixer e Turn off Phantom Power on automixer e Connect Zone Output s to amplifier s or powered loudspeaker s e Connect AEC Reference Inputs to the TO AEC output of an EF200 or to the output of a CODEC e Ifyou wish to use the EF1210 s built in Playback Record mixer feature con nect AMIX IN AUX IN To CODEC and REC as directed in Playback Record on page 22 3 If you are using an RS232 remote control device connect it to the RS 232 REMOTE CONTROL port if you are controlling multipl
84. makes the nominal output level 20 dBu and setting GAINZc to 20 makes the nominal output level 0 dBu The factory default setting for GAINZc is 12 8 dBu 10 dBV The following commands can be sent by the remote control device to set the ZONE output gain level GAINZcx Set ZONE input gain on output c c is either A or B x ranges from 0 dB to 20 dB GAINZc Request current ZONE output gain on output c Note The wildcard character is not allowed for specifying the chan nel number c for the GAINZc command The following messages are sent by the EF1210 in response to a GAINZc com mand or in response to any GAINZc command when acknowledgment mode is on ZONE output gain on output c is currently x dB In the following example the remote control device requests the current ZONE input gain on output A of the EF1210 with Device ID number 7 Then it sets a new level on output A on the same EF1210 Acknowledgment mode is enabled CO7GAINZA CO7GAINZAO CO7GAINZA19 CO7GAINZA19 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE LO CKFP LOCK UNLOCK FRONT PANEL The LOCKFP command locks the front panel buttons of the EF1210 so that they have no effect The factory default setting for LOCKFP is 0 unlocked Remote Commands The following commands can be sent by the remote control device to lock or unlock the front panel of the EF1210 Unlock the front panel buttons
85. mands from the RS 232 command set Set front panel The level of Reference input c will be REMOTE LED meter displayed on the REMOTE LED meter to display Reference and the yellow LED of the reference input c will light Request current The EF1210 returns Reference input c assignment of front which indicates that the front panel panel REMOTE LED REMOTE LED meter is currently set to meter display Reference input c c is either A or B ASPI Digital The Sound of DSP Technical Support 404 892 3200 39 EF1210 USER M ANUAL Adjusting Volume in The volume in the zones can be checked and adjusted using the following commands Zones from the RS 232 command set GAINZcx Set zone c output Zone c output gain set to x dB yellow gain to x LED on AEC will light c is either A or B x ranges from 0 to 20 dB GAINZc Request zone c out Current gain for zone c is returned to put gain remote control device Note See the GAINZc set ZONE output gain on output c on page 68 for amore detailed description of the zone output gain x During normal operation the zone output levels will be set 6 dB lower than the selected level amplifier acoustic gain limit to allow the EF1210 LEVEL ADJUST con trols to apply a volume adjustment to the room audio signal in the range 6 dB to 12 dB Adjusting Playback The AUX IN input and REC output signals are preset to 10 dBV signal levels The Levels level of the
86. minal equipment input EF Device Control Panel File View Passcades Setup EF1210 4 PLAYBACK RECORD CODEC OUT CALIBRATION Adjust Codec Output Level Codec Output Level dBu 14 Back Next gt nzow 2 90 ma mm For Help press F1 Figure 26 Step 4 Calibrating for playback and record ASPI Digital The Sound of DSP Technical Support 404 892 3200 EF1210 USER M ANUAL i Adjust CODEC output level Adjust it to 10 dBV 8 dBu or to OdBu to match the level required by your CODEC Note The CODEC output level is also adjustable from 20 dBu to 0 dBu using the UP and DOWN arrows on EFPanel ii Once you have completed To CODEC calibration you may have skipped this step if you are not using playback and record click on the Next button to pro ceed to Zone Reference setup CALIBRATION STEP 5 ZONE REFERENCE SETUP For Calibration Step 5 the STEP INDICATOR will be lit in the fifth position During Calibration Step 5 you may set the EF1210 to use different AEC Reference Inputs for each channel The reference signal used with channel 1 will be used as Zone A output and the reference used with channel 8 will be used as Zone B output Microphones on the input channels must be placed in the sound field of the appropri ate Zone output for the EF1210 to operate correctly otherwise echoes will not be can celled In other words if for example the microphone on channel 3 is in
87. mmm Figure 30 EF200 Phone Book on EFPanel Control Software e DIAL Dials the phone number that is highlighted the phone number that you have chosen e HANG UP Hangs up the EF200 e ADD Add a phone number to your phone book e Edit the names or phone numbers in your phone book e DELETE Delete an entry in your phone book A 18 http ww w aspi com Copyright 1999 All Rights Reserved EFPANEL FOR THE EF200 PHONE ADD EF200 OPTIONS Serial Traffic About Dialer Phone Book Options Settings Auto Answer Line Echo Canceller Nonlinear Processing Mute Remote Output Front Panel Lock Mute Phone Output Generate Ring Tones IV Noise Suppression Generate Entry Tones Normal C Conservative Phone Input Gain Phone Output Gain 6 12 100 4B 0 dB m DTMF Options Detection Enable Passcode DTMF Clamping t User Validated hold Enable DTMF Commands urrent User Validated hold Clone Save Settings Restore Settings 220 m 1 10 Figure 31 EF200 Options Page EFPanel Note For more information on these options refer to the EF200 Command Set Reference in the EF200 User Manual ASPI Digital The Sound of DSP AUTO ANSWER Enable disable auto answer mode AUTO Enable disable auto hangup mode AUTOMATIC GAIN CONTROL Enable disable automatic gain contro
88. n is currently x dB Example In the following example the remote control device requests the current playback input gain of the EF1210 with Device ID number 7 Then it sets a new level on the same EF1210 Acknowledgment mode is enabled CO7GAINP CO7GAINPO CO7GAINP4 CO7GAINP4 ASPI Digital The Sound of DSP Technical Support 404 892 3200 65 EF1210 USER M ANUAL GAINRC SET REFERENCE INPUT GAIN ON REFERENCE C Remote Commands EF1210 M essages 66 The GAINRc command sets the Reference input gain level on reference c of the EF1210 to a level between 0 dB and 20 dB This corresponds to a nominal Reference input signal level between 0 dBu and 20 dBu respectively For instance setting GAINRc to 0 corresponds to a nominal Reference input signal level of 0 dBu and set ting GAINRc to 20 corresponds to a lower nominal Reference input signal level of 20 dBu The purpose of the Reference input gain is to bring the signal level of the Reference input to a constant value at the A D inside the EF1210 For example if we expect a 12 dBu signal at the Reference input A AEC A we would set the Reference input gain of Reference A to 12 dB by sending the command GAINRA12 The Reference input gain is set using EF1210 calibration procedures See Calibra tion Step 3 Calibrating AEC Reference Inputs on page 32 The factory default setting for GAINRc is 20 20 dBu nominal level expected at input The following command
89. n 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 turned up too much the microphone level is too high the microphone is too close to the loudspeaker or the talker is not 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 turn 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 acous tic gain of aroom Refer to Check Acoustic Gain on page 31 ASPI Digital The Sound of DSP Technical Support 404 892 3200 27 EF1210 USER M ANUAL Two Methods of The EF1210 can be calibrated two ways calibrating with a computer or without We Calibration 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 com puter calibration procedures See Calibrating With a Computer below for our web address If you do not have a computer please refer to Calibrating Witho
90. n of this microphone channel is said to be 0 dB If the reflected signal picked up by the microphone is higher than the level of the signal sent to the Zone output that microphone channel has positive acoustic gain The more positive the acoustic gain the harder the AEC must work to determine which signal is an echo and which is a local speech signal http ww w aspi com Copyright 1999 All Rights Reserved TROUBLESHOOTING Acoustic Gain Failure In Conference Quick Check Acoustic gain failure can be caused through a number of mechanisms 1 The most common is excessive amplification of the remote reference signal at the local Zone output This may be explained as follows If the reference signal is too low coming into the EF1210 the room audio amplifier will need to be turned up to compensate and bring the room audio to an acceptable level For example if the reference signal is 12 dB too low just barely lighting the first green LED on the REMOTE SIGNAL LEVEL METER the room audio will need to be amplified by approximately 12 dB to bring it to a reasonable listening level This adds 12 dB to the acoustic gain which will most likely cause it to exceed the amplifier acoustic gain limit See Check Acoustic Gain on page 31 This sit uation can be remedied by proper calibration of the Reference input signal 2 Another common cause of acoustic gain failure is excessive microphone amplifi cation For example if a microphone is
91. nd List enable disable acknowledgment mode set REFERENCE input gain on reference c 6 ka GAINZc set ZONE output gain on output c LOC lock front panel disables front panel buttons enable disable mute on MIc input channel n NCn enable disable noise cancellation on channel n Deren RES restore settings to factory default 75 RESTNVm restore settings from non volatile memory in memory 76 slot m SAVENVm save current settings to non volatile memory in mem 77 ory slot SEL 9 set front panel input meter to display input channel n SELECTRc set front panel remote meter to display remote input 7 channel c change the sample rate of the EF1210 180 The following table is a list of messages sent by the EF1210 to the host Table 6 EF1210 Message List device response to PING command ASPI Digital The Sound of DSP Technical Support 404 892 3200 55 EF1210 USER M ANUAL ACKM O D ENABLE DISABLE ACKNOWLEDGMENT MODE Remote Commands EF1210 M essages Example 56 If acknowledgment mode is enabled the EF1210 will acknowledge each command it receives by repeating the status of the command that was sent This may be used for verifying that each command is received and recognized by the EF1210 When acknowledgment mode is turned off the remote control device can always request the status of a parameter by sending a query command such a
92. ne amplification also increases acoustic gain See Acoustic Gain Failure on page 45 You can check for excessive microphone amplification by observing the front panel INPUT LEVEL INDICATOR during a normal conference The first yellow LED should illuminate frequently If the second yellow LED is illumi nated constantly during normal speech or if the red LED illuminates or even flickers reduce the microphone input level Note Before you readjust the microphone input levels check to make sure you are looking at the correct channel on the INPUT LEVEL INDICATOR Check also to make sure that you are looking at the correct corresponding reference input level on the REMOTE LEVEL INDICATOR Note If you adjust the MIC LINE INPUT level you will affect the acoustic gain Check to make sure that the acoustic gain limit is not exceeded See Check Acoustic Gain on page 31 Grossly insufficient microphone gain degrades EF1210 performance and weakens the out bound speech power level This has the effect of reducing the signal to noise ratio of the microphone signal which is analogous to raising the background noise level in the room Because this noise is uncorrelated with the echoes within the room the EF1210 s ability to adapt and cancel echoes is compromised A second effect of insufficient microphone gain is that the power of the microphone input signal may be substantially lower than that of the remote input signal This http
93. nels are denoted in this Com mand Set Reference by the character n Reference inputs and Zone outputs are denoted by the character c Memory slot locations are denoted by the character m The command data is a string of up to 32 ASCII characters which follows the com mand name The allowed content of the command data depends on which command is being used Usually this is only one character because most commands just turn a feature on or off Some commands however may have several characters worth of data Commands can be sent to multiple devices by replacing the device type or Device ID characters with the character The following example commands illustrate the different ways you can send com mands to multiple devices by replacing the device type and or Device ID with characters C12ACKMOD1 Enable acknowledgment mode on the EF1210 with Device ID 12 O3ERRORI Enable error messages for devices of all types with Device ID 3 C12AEC 0 Disable AEC on all channels on the EF1210 with Device ID 12 RAS SWVER SHVER Request software version of all devices of all types Request software version of all devices of all types version of all devices of all types http www aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE VALID COMMANDS AND MESSAGES The following table is a list of commands recognized by the EF1210 Table 5 EF1210 Comma
94. nges or modifications to this equipment not expressly approved by the manufacturer could void the user s authorization to operate this equipment EN60950 Conformity of the equipment with those guidelines is attested by the CE C The EF1210 also complies with the CE standards EN50081 1 EN50082 1 and mark 50 http ww w aspi com Copyright 1999 All Rights Reserved WARRANTY INFORMATION WARRANTY INFORMATION W hat is covered For how long W hat we will do Limitations W hat we ask you to do Any defect in materials or workmanship Two years If your ASPI Digital product is defective and returned within two years of the date of purchase we will repair or at our option replace it at no charge to you If we repair your ASPI Digital product we may use new or reconditioned replace ment parts If we choose to replace your ASPI Digital product we may replace it with anew or reconditioned one of the same or similar design The repair or replacement is warranted for either a 90 days or b the remainder of the original two year warranty period whichever is longer ASPI Digital shall not be responsible for special incidental indirect or consequential damages resulting from any breach of warranty or under any other legal theory including but not limited to loss of profits downtime goodwill damage to or replace ment of equipment and property and any cost of recovering reprogramming or reproducing a
95. ny program or data stored in or used with ASPI Digital products Some states do not allow limitations on how long an implied warranty lasts or the exclusion of incidental or consequential damages so the above exclusions or limita tions may not apply to you To obtain warranty service for your ASPI Digital product call us at 404 892 3200 or fax us at 404 892 2512 and we will issue a Return Material Authorization number RMA Use the original packaging materials to return the product Ship the product prepaid to ASPI Digital Attention Warranty Repair RMA Must be on package 1720 Peachtree Street NW Suite 220 Atlanta Georgia 30309 2439 USA Please be sure to include your name company address phone number and a descrip tion of the problem After repairing or replacing your ASPI Digital product we will ship it to you via a surface carrier of our choice at no cost to you If you wish it shipped via a specific carrier at your cost you must arrange it when you obtain the RMA Repair or replacement of your ASPI Digital product is your exclusive remedy ASPI Digital The Sound of DSP Technical Support 404 892 3200 51 W hat this warranty does not cover No User Serviceable Parts State Law Rights 52 EF1210 USER M ANUAL This warranty does not cover defects resulting from accidents damage while in tran sit to our service location alterations unauthorized repair failure to follow instruc tions misuse
96. o apply a volume adjustment to the room audio signal in the range 6 dB to 12 dB Refer to Figure 12 on page 31 for further explanation CALIBRATIO N STEP 3 CALIBRATING AEC REFERENCE INPUTS 3 1 Once the Zone Output channels and room audio amplifier have been calibrated press the AUX IN LEVEL SETUP button again to switch to AEC Reference Input 32 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION calibration For Calibration Step 3 the LED will blink three times per period For this step you will need a live connection to a remote conferencing site or two sites if you are configuring the EF1210 for two AEC reference inputs e Ifyou are configuring the EF1210 for operation with one AEC reference input you will calibrate the AEC A signal e Ifyou are configuring the EF1210 for operation with two AEC reference inputs you will calibrate both the AEC A and the AEC B signals LED blinks three times for AEC Reference calibration MUTE LEVEL AUXIN REF INPUT POWER INPUT REM OTE ALL ADJUST LEVEL SELECT SELECT gee hy Lote 23450747 Am ier em I8 X OOOOOO O 190 e o 12 7 3 032008 12 7 3 0320 SETUP STEP 1 press STEP 3 4 adjust to select XX AEC A input selected level until person reference input talking at remote source Q Xx AEC B input selected site rarely flickers second yellow LED Figure 13 Calibrating AE
97. o 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 STEP 5 2a press to_ select channel for Meca LEDs light to calibration y indicate which LED blinks N channel is selected five times for zone ref setup UTE LEVEL AUXIN REF INPUT POWER INPUT REMOTE Hi ADJUST LEVEL SELECT SELECT sep K 2 3 4 5 6 7 8 X OOOOOO OCOOCO e 12 7 3 032098 12 7 3 0 320 S TUE WH STEP press to select reference zone XY A selected CMT d Xl zone B selected ASPI Digital The Sound of DSP Technical Support 404 892 3200 9 EF1210 USER M ANUAL ADVANCED INSTALLATION The installation procedure for the EF1210 consists of the following steps 1 2 4 Prepare for installation below Configure the DIP switches to accept appropriate levels from microphones or mixer See Configuration on page 15 Connect the EF1210 to other equipment See Connecting the EF1210 to other equipment on page 19 Calibrate the EF1210 See Calibration on page 27 PREPARING FOR INSTALLATION Reading the entire manual or at least the advanced installation section before begin ning the installation process will help you be more prepared
98. ode is enabled Note Itis possible to use a wildcard for setting AECn to 0 or 1 turn ing on off but not for querying or toggling CO7AEC21 CO7AEC21 CO7AECO CO7AEC60 http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE AECSN SET SUPPRESSION MODE ON CHANNEL N TO NORMAL OR AGGRESSIVE Suppression Level Selection Remote Commands The EF1210 has been designed and carefully optimized to provide the best possible balance between removing as much vestigial echo as possible and maintaining natu ral full duplex performance when both parties speak at the same time or one party tries to interrupt the other As designed the EF1210 should have no difficulty com pletely removing audible echo and adapting almost instantaneously to movements and level changes within the room as long as the EF1210 is set up correctly How ever it is possible that some room environments may be so harsh as to strain the boundaries of the operation of the EF1210 This may occur if the room is exceed ingly reverberant the room acoustic gain limit is exceeded or there is an excessive amount of background room noise which results in a low signal to noise ratio on both local speech and echo signals In conditions of excessive background noise the signal to noise ratio of the local speech signal can drop so low as make the conferencing system virtually unusable In such conditions it is difficult for the A
99. ol device to restore the EF1210 to the user defaults RESTNVm Restore settings from non volatile memory slot m m ranges from 0 to 3 The EF1210 sends a RESTNVm message in response to a command after the restore process is complete if acknowledgment mode is enabled Settings have been successfully restored from non volatile memory slot m m ranges from 0 to 3 In the following example the remote control device restores the default settings of the EF1210 with Device ID number 12 The EF1210 sends back messages notifying the remote control device that the parameters have been reset to the default settings C12RESTNVO C12RESTNVO http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE SAVENVM SAVE CURRENT SETTINGS TO NON VOLATILE MEMORY IN MEMORY SLOT M The SAVENVm saves the EF1210 s current settings to non volatile memory These settings will be used as the default settings each time the EF1210 is powered on The default settings may also be restored by sending the RESTNVm command Please note that audio may drop out for a second while the EF1210 writes to non vol atile memory Normally the SAVENVm command is used during the configuration process when a conversation is not taking place Once the SAVENVm command is sent from the host to the EF1210 the save process begins When the save process is completed the EF1210 sends the SAVENVm com mand back to the
100. onnection Reference signals to each EF1210 must still be wired to each EF1210 UNE ouTPUTS er NE 1 X E roe ARR A fasca ascal 2 n EEE EE EEE EEE ET AAAA AAAA ES ESSE ESSE ESSE ESSE EET TO 20 RE cooeg Device ID 0 8 Line Level Signals Automatic EE ic REF T pte ETT AMAMA AAAA AAA AAAA AAAA TO ZONE ZONE REC 1 A Device ID 1 8 Line Level Signals Automatic icrophone o ZOOO 000000 COO OOO n rec 0 ZONE ZONE Roo 0X Cb ee 03 aE hcm ae Device ID 2 8 Line Level Signals Automatic Figure 9 Connecting multiple EF1210s Connecting the ASPI Bus 26 Note The Device ID of each EF 1210 should be different from other EF 1210s connected together 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
101. onnector PINGUS 88 Connecting Balanced Equipment to Unbalanced Equipment 90 Connecting Unbalanced RCA to Balanced Mini Phoenix esses 90 Appendix A EFPanel Control Software User Manual About EFPanel Control Software en rated een suene seta nod A 3 Installing EEPahel ie et eee RENI ra iere A 3 Getting Started eU ea eue ens A 3 EFPanel Features for all EF Devices eese eere enne A 3 The dE T2 ODDORS Pase uus A 5 ASPI Digital Copyright 1999 Technical Support 404 892 3200 EF1210 USER MANUAL PRELIM INARY Calibrating the EF1210 with EFPanel Control Software A 7 Calibration Step 1 Calibrating Microphone Input Channels A 7 Calibration Step 2 Calibrating Zone Outputs eee A 9 Calibration Step 3 Calibrating AEC Reference Inputs esses 11 Calibration Step 4 Calibrating for Playback and Record sss A 13 Calibration Step 5 Zone Reference Setup esee A 14 SAVE Setup Settings e eode tee eee PE e dade A 15 EFPanel tor the EF200 Phone Add etie ero ope A 17 Dialer lise agitate A 17 Phone BOOK uU eaa etes 18 EF200 ODUONS eit eR E ede dee e Re eie Se t ees aes A 19 ASPI Digital Copyright 1999 Technical Support 404 892 3200
102. oolbar and dialing to a remote location with the Dialer the EF200 must be connected to the EF 1210 by the ASPI Bus as well as the remote input and output see the EF1210 User Manual for details Adjust the Reference Input Gain until the first yellow LED 0 dB on the REMOTE METER of the EF1210 front panel is flickering regularly with remote speech and the second yellow LED 3 dB is flickering occasionally iv If youare calibrating two AEC Reference Inputs repeat these steps choosing the A 12 http ww w aspi com Copyright 1999 All Rights Reserved CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE other Reference in step 1 Caution If you skip this calibration step you will compromise the performance of the EF1210 The audio coming from or going to the remote end may be too low so if you turn up the loudspeaker to compensate the acoustic gain will be affected v Once the AEC Reference Inputs have been calibrated click on the Next button to proceed to Playback Record calibration CALIBRATIO N STEP 4 CALIBRATING FOR PLAYBACK AND RECORD Note You may skip this step if you are not using playback and record on the EF1210 For Calibration Step 4 the STEP INDICATOR will be lit in the fourth position This step calibrates the CODEC signal No other calibration is necessary for Playback Record The To CODEC signal may be adjusted to match the level required by your CODEC or other remote ter
103. press ONSO 06702 ENABLE PASSCODE Enable disable a predefined passcode on incoming calls The passcode is currently hardwired to the digits that correspond to ASPI 2774 e CURRENT USER VALIDATED HOLD Puts the caller on hold e CLONE ME Copies EF200 settings of current EF200 to all EF200s connected together via the ASPI Bus e SAVE SETTINGS Save settings to non volatile memory e RESTORE SETTINGS Restores setting from non volatile memory A 20 http ww w aspi com Copyright 1999 All Rights Reserved
104. problems To avoid problems ensure that the Reference input signal as reflected on the REMOTE SIGNAL LEVEL METER is not too low and the microphone input signal as reflected on the INPUT SIGNAL LEVEL METER is not too high Run the built in EF1210 Acous tic Gain test to verify that you do not have acoustic gain problems See Check Acoustic Gain on page 31 If you experience residual echo problems during a conference you can quickly check that the reference and microphone levels are calibrated and not causing acoustic gain problems by observing the signal level meters as follows While the remote end is speaking and everyone on the local end is quiet observe the activity on the REMOTE SIGNAL LEVEL METER Remote speech should illuminate the first yellow 0 dB LED regularly and the second 3 dB LED occasionally Step through the microphone input channels by repeatedly pressing the INPUT SELECT front panel button while the remote end is speaking the local end must be silent dur ing this check and observe the activity on the INPUT SIGNAL LEVEL METER for each microphone channel in response to the remote talker If any microphone channel exhibits greater signal level activity than that shown on the REMOTE SIGNAL LEVEL ASPI Digital The Sound of DSP Technical Support 404 892 3200 45 Excessive Microphone Amplification Insufficient Microphone Amplification 46 EF1210 USER M ANUAL METER this indicates a possible probl
105. r Phoenix Contact Description Mini COMBICON 3 position plug 3 5 mm pitch Type Number MC 1 5 3 ST 3 5 or MC 1 5 3 ST 3 5 Part Number 1840379 ASPI Digital The Sound of DSP Technical Support 404 892 3200 89 EF1210 USER M ANUAL CONNECTING BALANCED EQUIPMENT TO UNBALANCED EQUIP MENT CONNECTING UNBALANCED RCA TO BALANCED MINI PHOENIX RCA Male Mini 3 5 mm Phoenix Tip Red Red DL Black d sE Figure 20 Cable construction for connecting unbalanced RCA to balanced mini Phoenix 3 conductor terminal block 1 Connect RCA Tip to Phoenix pin 1 2 Connect RCA Ring to Phoenix pin 2 3 Connect Phoenix pin 3 to Shield and leave Shield floating on RCA end Caution Do NOT connect the shield at both ends Caution On the EF1210 Phoenix pin 3 is connected to chassis ground Under no circum stances should Phoenix pin 3 be connected to pin 1 or to pin 2 Doing so will add noise to the audio signal 90 http www aspi com Copyright 1999 All Rights Reserved ASPI Digital The Sound of DSP Technical Support 404 892 3200 ECHOFREE EFPANEL CONTROL SO FTW ARE USER MANUAL 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
106. r no pink noise in Zone A and Zone B Choose Pink noise to Zone A for pink noise in Zone A Choose Pink noise to Zone B for pink noise in Zone B ii Select input channel to calibrate You will need a Sound Level Meter SPL Meter for this step Adjust micro phone and loudspeaker to attain the appropriate dB SPL at the microphone using the following steps Set the SPL meter to C weighted slow response Choose the appropriate dB SPL range using Table 7 below based on microphone type and the talker s distance from the microphone Table 7 Typical distance from microphone to talker and appropriate dB SPL level MICROPHONE TYPE TYPICAL DISTANCE FROM SPL LEVEL TALKER FT dB 6inchestolfoot inches to 1 foot 89dBSPL dB SPL Boundary or other tabletop 73 dB SPL Place the SPL meter beside the microphone Point the SPL meter and the microphone toward the loudspeaker Adjust the microphone loudspeaker so that a nominal dB SPL level based on Table 7 is registered at the microphone Note Always double check the microphone level with normal speech once the microphones are in normal operating position Actual speech levels may vary depending on room reverberation etc Verify that you set a reasonable level three green LEDs and one solid yellow LED or 0 dB by actually talking and looking at the meter iv Adjust level until the first yellow LED 0 dB on the INPUT SIGNAL LEVEL METER of the
107. rdings may be boosted to be audible at both ends To use the EF1210 Playback mixer the output of the automixer must be brought in to the AMIX IN input on the EF1210 and the input to the CODEC or other remote ter minal device must be taken from the To CODEC output of the EF1210 The AUX IN input on the EF1210 will be added internally to the To CODEC signal and also to the ZONE A output http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION To use the internal EF1210 Record mixer the output of the automixer must be brought in to the AMIX IN input on the EF1210 The input to the CODEC can come from the automixer output as well or may be taken from the To CODEC output of the EF1210 The output will carry a mix of the AMIX IN and the AEC A signals Alternatively you can do this mixing externally connect playback output of external program audio device to an automixer input If record and playback signals are gen erated using an external mixer the AUX IN and AMIX IN inputs and the and To 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 playback 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
108. record the audio of the confer ence to an external device such as a tape recorder qi B 2222mm Teme TAPE CORDER VCR 12 00 Erie ZONE A EX CH1 AUX TO AMIX OUT 1 REC conec CH2 OUT 2 CH3 OUT 3 CH4 OUT 4 dis EF1210 Sire CODEC 005 Mixer OUT 6 CH7 e gt OUT 8 Z AEC A Ly 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 CODEC signal must be mixed and out put to arecording device Since the remote output will normally be produced by an automixer external to the EF1210 the output of the automixer must be available to be mixed with the REC and AUX IN signals This mixing may be implemented using external matrix mixer if available or using the internal mixers provided in the EF1210 In addition to the convenience of using the EF1210 mixers the EF1210 pro vides remote control of the level of the AUX IN signal so that weak reco
109. reflections from the telephone hybrid The EF200 is the recom mended Phone Add for any application Technical Support 404 892 3200 11 EF1210 USER M ANUAL EF1210 FRONT AND REAR PANELS 12 y C 5 Z ECHOFREE EF1210 roweR nr LeveL ADJUST gt gt 9 g 000000000 eec 1 2 3 4 5 6 7 8 9 10 11 12 BUS IN LIIS INPUTS LUNEOUTPUTS ab ene 2 CEEPEEEEEEEEEREEEEEEEEEEEREEREREERTEREEEEREREEEEEEEEEERELEHIE 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Figure 1 EF1210 Front and Rear Panels 1 10 11 12 13 POWER INDICATOR When the LED is green power is on INPUT SIGNAL LEVEL INDICATOR Indicates level activity on any one of the 8 mic input signals selected by INPUT SELECT button REMOTE SIGNAL LEVEL INDICATOR Indicates level activity on either of the two reference signals selected by REF SELECT button MUTE ALL LED This LED is only ON when all 8 LINE OUTPUT channels are muted If only some of the channels are muted the LED will not be ON LEVEL ADJUST Adjusts digital trimpot levels for the 8 microphone inputs 2 ref erence inputs 2 zone outputs CODEC output and Aux input used in conjunc tion
110. rom the EF1210 See Playback Record on page 22 for a description of the Record and Playback mixer circuitry See also To CODEC number 26 Note Amix IN must be 0 dBu signal AUXIN Connects to the output of a tape recorder VCR or other recording device Playback from a program audio device is only available with the Refer ence A input signal See Playback Record on page 22 for a description of the Record and Playback mixer circuitry AEC A REF INPUT Connect to the output of a CODEC or hybrid connected to Zone A AEC B REF INPUT Connect to the output of a CODEC or a hybrid connected to Zone B LINE OUTPUTS Connect to the inputs of an automixer or matrix mixer Caution set mixer inputs to 0 dBu line level phantom power OFF Connects to a recording device REC requires taking the output from the 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 Record and Playback mixer circuitry To Copec Connects to the CODEC When the output of the automixer is plugged in to AMIX IN the To CODEC signal is a mix of the AMIX IN and Aux IN signals This is only needed when you want to add a Playback signal to the auto mixer output before it is sent to the CODEC See Playback Record on page 22 for a description of the Record and Playback mixer circuitry ZONE A
111. rophones closer to talkers and if necessary adding acoustical treatment to the room Try muting one channel at a time to see if the echo goes away when a particular chan nel is muted You can mute the channel by using the MUTEI command on the EF1210 or by muting it on the automixer turn down volume of the microphone on mixer or use the logic port control If you find that the echo goes away when a par ticular channel is muted the microphone may not be calibrated correctly Check one or more of the following issues The most common cause of poor echo cancellation performance is incorrectly adjusted acoustic gain This may be explained as follows The reference signal seen by the AEC is sent to the Zone output where it is amplified and sent to the room loud speakers The loudspeaker audio is coupled into the room microphones acoustically through direct and reflected acoustic paths and perhaps also through mechanical cou pling The microphone signal is then amplified and sent to the AEC as the local microphone input signal The acoustic gain of a microphone channel refers to the rel ative levels of the signal sent to the Zone output before any amplification and the level of this signal that is reflected as the microphone input after microphone ampli fication If the electrical level of the reflected signal picked up by microphone is the same as the level of the electrical signal sent from the AEC to the Zone output the acoustic gai
112. s NC When acknowledg ment mode is enabled a query command only generates one message in response For example when you send NC you don t get NC back in addition to the status of the noise cancellation feature Since acknowledgment mode reports the status of the command rather than simply echoing back the command you get a verification that the command had the effect you thought it would For example a command that toggles a parameter will give you the new on or off status rather than just echoing the toggle command The factory default setting for ACKMOD is 1 on The following commands can be sent by the remote control device to enable or dis able acknowledgment mode Turn off acknowledgment mode Turn on acknowledgment mode Toggle acknowledgment mode on or off Request status of acknowledgment mode The following messages are sent by the EF1210 in response to an ACKMOD com mand or in response to any ACKMOD command when acknowledgment mode is on Acknowledgment mode is currently off Acknowledgment mode is currently on At the beginning of the example acknowledgment mode is turned off at first The remote control device turns on noise cancellation but does not receive an acknowl edgment The remote control device requests the status of acknowledgment mode http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE turns it on and then turns off noise cancellation This tim
113. s can be sent by the remote control device to set the REFER ENCE input gain level GAINRcx Set REFERENCE input gain on reference c c is either A or B x ranges from 0 dB to 20 dB GAINRc Request current REFERENCE input gain on refer ence c Note The wildcard character is not allowed for specifying the chan nel number c for the GAINRc command The following messages are sent by the EF1210 in response to a GAINRc com mand or in response to any GAINRc command when acknowledgment mode is on caiNRex REFERENCE input gain on reference cis curently x input gain on reference c is currently x http ww w aspi com Copyright 1999 All Rights Reserved EF1210 COMMAND SET REFERENCE Example In the following example the remote control device requests the current REFERENCE input gain on reference B of the EF1210 with Device ID number 7 Then it sets anew level on reference B on the same EF1210 Acknowledgment mode is enabled CO7GAINRB CO7GAINRBO CO7GAINRB4 CO7GAINRBA ASPI Digital The Sound of DSP Technical Support 404 892 3200 67 EF1210 USER M ANUAL GAINZc SET ZONE OUTPUT GAIN ON OUTPUT Remote Commands EF1210 Messages Example 68 The GAINZc command sets the ZONE output gain level on output c of the EF1210 to a level between 0 dB and 20 dB The output gain setting corresponds to a nominal output level that ranges from 20 dBu to 0 dBu respectively For instance setting GAINZc to 0
114. setup step INPUT CHANNEL LEDs During normal operation these LEDs indicate which input channel is selected for display on the INPUT LEVEL INDICATOR During setup it has different functions depending on the setup step Dip SWITCHES Select mic or line level inputs phantom power and ASPI Bus ID http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION 14 15 16 17 18 19 20 21 22 23 24 29 26 27 28 ASPI Digital The Sound of DSP ASPI Bus IN Connects to the ASPI Bus OUT of another ASPI Digital device ASPI Bus Our Connects to the ASPI Bus IN of another ASPI Digital device RS 232 REMOTE CONTROL PORT Connect this to an optional RS 232 remote control device such as a touch panel or personal computer COM port THREADED 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 strain relief POWER 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 MIC LINE INPUTS Connects to microphone at either mic or line level with or without phantom power both selectable with DIP switches AMIX IN Connects to the output of the automixer This is internally mixed with AEC A and is output to REC This is only needed when recording f
115. sure there is activity when you speak into the microphone You can display each microphone s input level by using the INPUT SELECT button to cycle through each microphone If the INPUT LEVEL INDICATOR shows activity when you speak into the microphone the EF1210 is receiving the microphone signal This means the remote end is not receiv ing a signal from the EF1210 42 http ww w aspi com Copyright 1999 All Rights Reserved TROUBLESHOOTING Check LINE OUTPUTS by connecting each output to the amplifier or powered loud speaker in the appropriate zone turn the loudspeaker down to avoid howling If the loudspeaker emits sound when you speak into the microphone the signal is making it through the EF1210 This means there is a problem with the automixer CODEC the CODEC connection or a device on the remote end If the INPUT LEVEL INDICATOR does not display activity the EF1210 is not receiving the microphone signals This means there is a problem with the microphone If the microphones you are using require phantom power make sure it is enabled on the appropriate channel on the EF1210 DIP switches Make sure the phantom power voltage is compatible with the microphone Make sure the automixer output is connected to the CODEC or EF200 input Make sure the CODEC or EF200 is turned on Make sure everything on the remote end is working properly Make sure the cables are not broken Check the cable pinouts Make sure the microphone
116. t 0 PowerUp Settings C Memory Slot 1 Memory Slot 2 C Memory Slot 3 C Keep Setup Settings But Do not Save To Nonvolatile Memory Settings Will Be Lost If EF1210 is Powered Down JT Hert Cancel Finish nzs For Help press F1 Figure 28 Save Setup Settings Select Save Option e Save to a file This option saves to a file that can be restored when the EF1210 is in normal operating mode From the File menu on the menu bar choose Open Configuration File to restore the settings you saved by choosing this option You can also save a configuration to file at ASPI Digital The Sound of DSP Technical Support 404 892 3200 A 15 EF1210 USER M ANUAL any time using the Save Configuration File option from the File menu Save to non volatile memory This option saves to non volatile memory and allows you to choose which memory slot to save to Settings saved to mem ory slot 0 will be used as power up settings Keep setup settings but do not save The settings you made during Setup mode will be applied when the EF1210 is in normal operating mode but will not be saved http www aspi com Copyright 1999 All Rights Reserved EFPANEL FOR THE EF200 PHONE ADD EFPANEL FOR THE EF200 PHONE ADD DIALER EF Device Control Panel emn ep mi Figure 29 EF200 Dialer on EFPanel Control Software DIALER KEYPAD Use this keypad to dial a phone number or use the k
117. t enhances the operation and improves the sound quality of an automixer for example by preventing it from bring ing the noise level up and down when microphones are gated on and off By cancel ling 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 cancel ler That means reduced listener fatigue and a higher quality audio conference 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 e 8 microphone line level inputs e Phantom power on each input e Ambient noise cancellation patent pending on each input e Fastconvergence rate of 30 dB sec e Works in environments with up to 10 dB of room gain e Links to other ASPI devices such as EF200 Phone Add e Compatible with most matrix and automixers e Fully RS 232 controllable via room controllers e Front panel lock out capability e Can be used as a wideband noise canceller 20 kHz bandwidth when AEC is dis abled e Long Tail Time supports even the most difficult of rooms 200 ms e Supports up to two AEC reference input signals e Supports record and playback Ability to store user configurations in non volatile memory e Digita
118. t receiving signal In this case the problem is between the EF1210 and the microphone s on the remote end Check the CODEC or EF200 output by connecting it directly to the amplifier or powered speaker If you hear nothing the EF1210 is not causing the problem and the source of the problem is elsewhere in the system Make sure the CODEC or EF200 is connected to the appropriate reference input AEC A or AEC B from the appropriate zone Make sure the CODEC or EF200 is turned on Make sure everything on the remote end is working properly Make sure the cables are not broken Check the cable pinouts If you see signal activity on the REMOTE signal meter make sure the appropriate zone output ZONE A or ZONE B is connected to the amplifier or powered loudspeaker input Make sure the amplifier or powered loudspeaker is on and that the volume is at an appropriate level If the zone output level needs adjusting choose the appropriate zone by pressing the REF SELECT button on the front panel The yellow AEC A or AEC B LEDs indicate not only the reference input but also the corresponding zone output Caution When adjusting amplifier or powered loudspeaker levels be careful not to exceed the maximum amplification level that you took note of in the Zone Output calibration see Check Acoustic Gain on page 31 No OUTPUT TO REMOTE END Remote end can t hear you Check each microphone s level on the INPUT LEVEL INDICATOR to make
119. te control device to enable or dis able error reporting Turn off error reporting ERRORI Turn on error reporting ERROR2 Toggle error reporting on or off ERROR Request status of error reporting EF1210 M essages The following messages are sent by the EF1210 in response to an ERROR command or in response to any ERROR command when acknowledgment mode is on Error reporting is currently off Error reporting is currently on Example In the following example the remote control device requests the error reporting status of the EF1210 with Device ID number 7 Then it enables the error reporting of the same EF1210 Acknowledgment mode is enabled CO7ERROR CO7ERRORO 7 1 7 1 ASPI Digital The Sound of DSP Technical Support 404 892 3200 61 EF1210 USER M ANUAL GAINC sET CODEC OUTPUT GAIN Remote Commands EF1210 Messages Example 62 The GAINC command sets the CODEC output gain level of the EF1210 to a level between 0 dB and 20 dB The output gain setting corresponds to a nominal output level that ranges from 20 dBu to 0 dBu respectively The factory default setting for GAINC is 12 8 dBu 10 dBV The following commands can be sent by the remote control device to set the CODEC output gain level caiNcx SerCODECouputga m CODEC output gain x ranges from 0 dB to 20 dB Request current CODEC output gain The following messages are sent by the
120. ters Zone Output calibration the AEC A and AEC B LEDs are lit indicating that both zones will be calibrated Use this if you want to calibrate both zones at the same time e Ifyou want to calibrate only Zone A press the REF SELECT button to select Zone A Only the AEC A LED lights indicating Zone A e Ifyou want to calibrate only Zone B press the REF SELECT button again to select Zone B Only the AEC B LED lights indicating Zone B 2 3 Check the specifications of your room audio amplifier input e If it expects consumer level 10 dBV input press the LEVEL ADJUST DOWN button once e fithas a balanced input connector and expects 0 dBu input level press the LEVEL ADJUST UP button once More precise level adjustments can be made with the RS 232 commands see the GAINZ command on page 68 of the Command Set Reference 2 4 If you selected only one of the Zone Outputs repeat for the second Zone Output For visual instructions refer to Figure 12 on page 31 Check Acoustic Gain 2 5 At this point you are ready to calibrate the absolute maximum room audio ampli fication level For this step you should ensure that the microphones have been returned to their normal operating location and orientation This procedure uses a known nominal electrical noise signal level at the zone output to let you see if any of the microphone input channels will exceed the permissible acoustic gain during normal conferencing operation The level of this noise sign
121. time program the remote control device to turn on wideband noise cancellation for sound reinforce ment Set sample rate to 16 The normal operating mode is 16 kHz kHz In this mode AEC can be enabled or disabled Set sample rate to 48 The wideband mode 48 kHz is pro kHz vided for applications that require high fidelity noise cancellation In this mode AEC is disabled SR Request sample rate Current sample rate is returned to remote control device Splitting zones Use EF Panel Control Software to calibrate the EF1210 On Calibration Step 5 when using more than one zone associate each microphone input channel with either Ref erence A or Reference B If you are using two reference signals Reference A and Reference B Input Channel must be associated with Reference A AEC A and Input Channel 8 must be associated with Reference B AEC B The other 6 micro phones can be associated with either reference ASPI Digital The Sound of DSP Technical Support 404 892 3200 41 EF1210 USER M ANUAL TRO UBLESHO O TING No OUTPUT TO LOUDSPEAKERS IN ZONE You can t hear the remote end Check the REMOTE LEVEL INDICATOR of the zone use the REF SELECT button to switch between Reference A and Reference B If the LED graph meter shows activ ity the EF1210 is receiving a signal In this case the problem is between the EF1210 and the loudspeaker If there is no activity on the REMOTE LEVEL INDICATOR the EF1210 is no
122. tion is necessary for Playback Record The To CODEC signal may be adjusted to match the level required by your codec or other remote terminal equipment input Note You may skip this step if you are not using playback and record on the EF1210 LED blinks four times for record and playback calibration POWER INPUT REMOTE WS m A Segara setup C 1 2 4 s 6 7 8 X COOCOO OCCOOO ee e 12 7 3 0 320dB 12 3 0 320 SETUP STEP 4 2a STEP 4 26 press to set press to set CODEC OUT CODEC OUT level to 10 level to 0 dBu dBV Figure 14 Calibrating for playback and record 4 2 Press the LEVEL ADJUST DOWN button to set the TO CODEC level to 10 dBV Press the LEVEL ADJUST UP button to set the TO CODEC level to OdBu More precise level adjustments can be made with RS 232 commands See the GAINC command on page 62 in the Command Set Reference Refer to Figure 14 on page 34 CALIBRATION STEP 5 ZO NE REFERENCE SETUP 5 1 Enter Zone Reference Setup mode by pressing AUX IN LEVEL SETUP after step ping through the normal configuration sequence For Calibration Step 5 the SETUP LED will blink five times per period If you are only using a single zone you may omit this step During Calibration Step 5 you may set the EF1210 to use different AEC Refer ence Inputs for each channel The reference signal used with channel 1 will be used as Zone A output and the reference used wit
123. uch as a touch panel or personal computer The commands control enabling and configuring the EF1210 s features The EF1210 Command Set also includes messages which are sent back to the remote control device These messages can contain acknowledgment or status messages in response to EF1210 commands This reference describes the syntax of all of the available commands and messages as well as the purpose and effects of each of these commands In short it provides all the information necessary to integrate the EF1210 Command Set into a remote con trol device COMMAND SYNTAX The EF1210 commands are short strings of text which are case sensitive The com mands contain a Device Type and Device ID for specifying an individual device in a chain of ASPI Digital products on an ASPI Bus so that commands can be targeted at a specific unit They also contain a command name input channel number in some cases and some data to be used by the command Each command is terminated with a carriage return character Description Number of Characters Range of Values Device Type 1 0 9 7 Device ID 2 00 31 Command Name 1 7 0 9 A Z Channel Number 1 if applicable 1 8 A B 0 3 Command Data 0 32 ASCII characters Terminator 1 M Device type The Device Type indicates which ASPI Digital product the command is being sent to For the EF1210 the device type is always C Device ID The Devic
124. uest the software version of the EF1210 EF1210 M essages The following message is sent by the EF1210 in response to a SWVER command indicating its software version The EF1210 software version is xx yy denotes a major revision yy denotes a minor revision Example In the following example the remote control device requests the software version of the EF1210 with Device ID number 12 C12SWVER C12SWVER1 00 ASPI Digital The Sound of DSP Technical Support 404 892 3200 81 EF1210 USER M ANUAL ERRO R ERROR MESSAGE The error messages report errors that the EF1210 encounters These are usually com mand syntax errors The errors are numbered and the meaning of each error number is described below Error messages are enabled or disabled with the ERROR com mand and must be enabled for this message to be sent Remote Commands The ERROR command should not be sent to the EF1210 It s only used as a mes sage from the EF1210 EF1210 M essages The following messages are sent by the EF1210 when it has an error ERROR 02 Invalid command data Example In the following example the remote control device tries to send a few invalid com mands to the EF1210 with Device ID 6 The EF1210 returns an error message in response to each of these commands Error messages are enabled CO6PHONE CO6ERROR 02 82 http www aspi com Copyright 1999 All Rights Reserved EF1
125. ut a Com puter on page 28 for front panel setup CALIBRATING WITH A COM PUTER Included in your shipment of the EF1210 is a diskette containing the EFPanel Control 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 CALIBRATING WITHOUT A COMPUTER In Calibration mode the SETUP LED will blink to let you know which setup step you are currently executing The different modes are shown in Table 3 below Press the AUX IN LEVEL SETUP button to move from one Calibration step to the next When you have finished Calibration Step 5 press the AUX IN LEVEL SETUP button again to exit Calibration mode any changes that you made will be saved as the default power on settings when you exit the Calibration procedure If you miss a Calibration step or lose your place and get to the wrong Calibration step you may either continue and come back to the missed step later or exit Calibration mode by pressing AUX IN LEVEL SETUP button repeatedly until the SETUP 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 c
126. ycle power on the EF1210 before exiting Calibration mode Legend EDot Xl LED On LED Blinking Button Figure 10 Legend for calibration drawings SETUP CALIBRATION MODE Mic Input Calibration SETUP LED blinks once per period ZONE Output Calibration SETUP LED blinks twice per period AEC REF Input Calibration SETUP LED blinks three times per period Calibrating for Playback and Record SETUP LED blinks four times per period Zone Reference Setup SETUP LED blinks five times per period Table 3 Visual indication of calibration mode 28 http ww w aspi com Copyright 1999 All Rights Reserved ADVANCED INSTALLATION Note One period equals the number of blinks per step plus one off time CALIBRATION STEP 1 CALIBRATING MICROPHONE INPUT CHANNELS 1 1 Press and hold the AUX IN LEVEL SETUP button and the INPUT SELECT button for two seconds to enter configuration mode of the EF1210 For Calibration Step 1 the SETUP LED will blink once per period For this step you will need a Sound Level Meter SPL Meter STEP 1 1 Press and STEP 1 3 hold AUX IN LEVEL press to select SETUP buttonand channel for 77777 LEDs light t INPUT SELECT for 2 calibration seconds to enter i i h l lected configuration mode LED blinks AN a a once for microphone calibration b y POWER INPUT REM OTE MUTE ADUSE EST Seay SETUP NEO ARE p iol a 57 I8 548 x 000000 ee e e OOOOXSOOOOO 3 20

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