ECHOFREE™ EF1210 MULTI-CHANNEL ACOUSTIC ECHO AND NOISE CANCELLER 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, GA 30309-2439 (404) 892-3200 www.echofree.com Technical Support: (404) 892-3200 help@aspi.
EF1210 USER MANUAL Introduction....................................................................................................3 Product Features .................................................................................................... 4 Quick Installation...........................................................................................6 Hardware Installation ............................................................................................ 6 Calibration...................
EF1210 USER MANUAL PRELIMINARY Calibrating the EF1210 with EFPanel Control Software...............................A-7 Calibration Step 1: Calibrating Microphone Input Channels................................ A-7 Calibration Step 2: Calibrating Zone Outputs ....................................................... A-9 Calibration Step 3: Calibrating AEC Reference Inputs ......................................... A-11 Calibration Step 4: Calibrating for Playback and Record.....................................
INTRODUCTION INTRODUCTION Congratulations! Congratulations on your purchase of the EchoFree™ EF1210 Multi-Channel Acoustic 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. How to Use This Manual This manual is a reference manual for your EF1210. It is structured to provide the information you need quickly and conveniently.
EF1210 USER MANUAL conversation. At a convergence rate of 30 dB per second, ASPI echo cancellers are the fastest on the market. Because the EF1210 supports a wider range of acoustic gain than most echo cancellers, it offers greater flexibility in loudspeaker and microphone 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.
INTRODUCTION • • ASPI Digital - The Sound of DSP Pink noise generator for calibration mode 2 year warranty Technical Support: 404.892.
EF1210 USER MANUAL QUICK INSTALLATION Installation of the EF1210 involves two procedures: hardware installation, and calibration. HARDWARE INSTALLATION Hardware installation involves the following steps: 1. 2. 3. 4. 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.
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.
EF1210 USER MANUAL EF1210 CALIBRATION QUICK REFERENCE Legend: LED Off LED On LED Blinking Button Calibration Step 1: Calibrating Microphone Input Channels 1.1. Press and hold the AUX IN LEVEL/SETUP and the INPUT SELECT buttons for 2 seconds to enter setup. SETUP LED blinks once per period. 1.2. Press REF SELECT to select noise output source. 1.3. Press INPUT SELECT to select input channel to calibrate. 1.4. Place SPL meter beside mic pointing in the same direction.
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. 3.4. Press LEVEL ADJUST until first yellow LED on REMOTE meter is flickering regularly and 2nd yellow is flickering rarely.
EF1210 USER MANUAL ADVANCED INSTALLATION The installation procedure for the EF1210 consists of the following steps: 1. 2. 3. 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).
ADVANCED INSTALLATION Note. ASPI Digital - The Sound of DSP The EchoFree™ EF200 Phone Add provides a full duplex interface 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 reflections from the telephone hybrid.
EF1210 USER MANUAL EF1210 FRONT AND REAR PANELS T H E S O U N D POWER O F ECHOFREE D S P INPUT -12 -7 -3 0 MUTE ALL REMOTE 3 20 dB -12 -7 -3 0 3 AUX IN REF INPUT LEVEL SELECT SELECT LEVEL ADJUST TM EF1210 INPUT CHANNELS SETUP AEC A AEC B 1 2 3 4 5 6 7 8 TO ZONE CODEC A ZONE B 20 SETUP 1 2 3 4 5 6 7 8 9 10 11 12 M IC 1 P HANTOM 1 M IC 2 P HANTOM 2 M IC 3 P HANTOM 3 M IC 4 P HANTOM 4 M IC 5-8 P HANTOM 5 P HANTOM 6 P HANTOM 7 P HANTOM 8 R ESERVED R ESERVED DEVICE
ADVANCED INSTALLATION 14. ASPI BUS IN. Connects to the ASPI BUS OUT of another ASPI Digital device. 15. ASPI BUS OUT. Connects to the ASPI BUS IN of another ASPI Digital device. 16. 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. 17. 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. 18. POWER SUPPLY INPUT.
EF1210 USER MANUAL How to Get Useful Information from the Signal Level Meters When configuring the EF1210, it is very important to know which signal level meter to look at. On the front panel, there are two signal level meters — the 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.
ADVANCED INSTALLATION CONFIGURATION MIC 1 PHANTOM 1 MIC 2 PHANTOM 2 MIC 3 PHANTOM 3 MIC 4 PHANTOM 4 MIC 5-8 PHANTOM 5 PHANTOM 6 PHANTOM 7 PHANTOM 8 RESERVED RESERVED DEVICE ID 16 DEVICE ID 8 DEVICE ID 4 DEVICE ID 2 DEVICE ID 1 Configure the DIP Switches ON LINE LINE LINE LINE LINE Figure 2. DIP Switches on EF1210 Back Panel Note. When the DIP switch is down (as shown in the diagram in Figure 2), it is in the OFF position. When the DIP switch is up, it is in the ON position.
EF1210 USER MANUAL SWITCH # LABEL FUNCTION 11 PHANTOM 6 Sets phantom power for microphone 6. See Caution below. 12 PHANTOM 7 Sets phantom power for microphone 7. See Caution below. 13 PHANTOM 8 Sets phantom power for microphone 8. See Caution below.
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.
EF1210 USER MANUAL Device ID Switch 16 (Device ID 16) 18 Switch 17 (Device ID 8) Switch 18 (Device ID 4) Switch 19 (Device ID 2) 22 ON ON ON 23 ON ON ON 24 ON ON 25 ON ON 26 ON ON ON 27 ON ON ON 28 ON ON ON 29 ON ON ON 30 ON ON ON ON 31 ON ON ON ON Switch 20 (Device ID 1) ON ON http://www.aspi.
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 output (ZONE A or ZONE B).
EF1210 USER MANUAL Zoning The EF1210 may be configured to work with a single AEC reference input or with two distinct AEC reference inputs. If a single reference is used, the two zone outputs (Zone A and Zone B) will carry the same signal, and either or both of them may be connected to room audio amplifiers. An example of using a single reference on the EF1210 is shown in Figure 3 on page 19.
ADVANCED INSTALLATION Typical EF1210 Connections The EF1210 will typically be connected to other equipment in a single zone setup as shown below in Figure 5. POWER LOW HIGH V O L U M E microphone microphone Remote Control System (Optional) MI C POWERED SPEAKER 8 microphones ...
EF1210 USER MANUAL Phone Add. Note. • Playback/Record 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. 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 television or VCR, to the conference.
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 REC 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).
EF1210 USER MANUAL • Connect TO CODEC to FROM AEC on the EF200 or the input of the CODEC. Note. 24 When using the internal EF1210 Record and Play circuitry, a signal being played back will NOT be recorded to avoid the potential of a feedback loop caused by the record/playback device. http://www.aspi.
ADVANCED INSTALLATION Figure 8 on page 25 depicts connections on the EF1210 for record and playback. microphone microphone 8 microphones ...
EF1210 USER MANUAL Connecting Multiple EF1210s Multiple EF1210s can be easily connected together to add more zones or microphones to your setup. The ASPI Bus allows multiple devices to be controlled by a single RS-232 connection. Reference signals to each EF1210 must still be wired to each EF1210.
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.
EF1210 USER MANUAL Two Methods of Calibration The EF1210 can be calibrated two ways: calibrating with a computer or without. We recommend using a computer for calibration because it is an easier procedure and it is more precise. If you have a computer, please refer to our on-line document for computer calibration procedures. See “Calibrating With a Computer” below for our web address. If you do not have a computer, please refer to ““Calibrating Without a Computer” on page 28” for front panel setup.
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.
EF1210 USER MANUAL 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 calibrating. 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.
ADVANCED INSTALLATION STEP 2.6: press to select channel; check level LED blinks twice for Zone calibration POWER INPUT -12 -7 -3 0 3 20 dB -12 -7 STEP 2.6: adjust external amplifiers/loudspeakers so that no more than 3 green LEDs are lit (repeat for each channel) MUTE ALL REMOTE -3 AUX IN LEVEL LEVEL ADJUST REF SELECT INPUT SELECT SETUP AEC AEC A B LEDs light to indicate which channel is selected 1 2 3 4 5 6 7 8 SETUP 0 3 20 STEP 2.
EF1210 USER MANUAL 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.
ADVANCED INSTALLATION calibration. For Calibration Step 3, the SETUP 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). • • If you are configuring the EF1210 for operation with one AEC reference input, you will calibrate the AEC A signal.
EF1210 USER MANUAL 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 terminal equipment) input. Note.
ADVANCED INSTALLATION put, channel 3 must be configured to use Reference B (AEC B) 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 reference. STEP 5.
EF1210 USER MANUAL MOUNTING THE EF1210 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. Recommendation For Easy Access 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.
ADVANCED INSTALLATION Caution! Do not use any other power supply other than the one provided with this unit. Caution! Failure to use all four screws to attach the EF1210 to the rack may result in uneven loading and cause a safety hazard. Caution! Ensure that the power supply is securely located such that it cannot become dislodged and fall. Such a fall could cause personal injury or equipment failure.
EF1210 USER MANUAL OPERATING THE EF1210 USING THE EF1210 WITHOUT RS-232 CONTROL Changing Level Display on INPUT and REMOTE LED Meters 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 currently displayed on the INPUT LED meter.
OPERATING THE EF1210 USING THE EF1210 WITH RS-232 CONTROL You can 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 hidden behind the user interface of the remote control device. A full Command Set Reference is provided at the end of this manual starting on page 53.
EF1210 USER MANUAL Adjusting Volume in Zones The volume in the zones can be checked and adjusted using the following commands from the RS-232 command set: Command Description Effects GAINZcx Set zone c output gain to x. Zone c output gain set to x dB; yellow LED on AEC c will light. c is either A or B. x ranges from 0 to 20 dB. GAINZc? Request zone c output gain. Current gain for zone c is returned to remote control device. Note.
OPERATING THE EF1210 Wideband NC vs. AEC mode Splitting zones Having the option to turn the AEC off for wideband noise cancellation is particularly useful when used in a system that has both conferencing capabilities and sound reinforcement. 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 conference (when the phone or CODEC is connected).
EF1210 USER MANUAL TROUBLESHOOTING 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 activity, 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 not receiving a signal.
TROUBLESHOOTING Check LINE OUTPUTS by connecting each output to the amplifier or powered loudspeaker 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.
EF1210 USER MANUAL RESIDUAL ECHO You may hear residual echo if system levels are not set properly. Improper level settings anywhere in the audio path can introduce nonlinearities that hamper the operation of the EF1210. If you hear residual echo, one of the following conditions may be causing the problem. Reverberation vs. Echo Do not confuse the residual echo of remote speech with the reverberation of local speech.
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.
EF1210 USER MANUAL METER, this indicates a possible problem with the acoustic gain on that microphone channel. If this excessive coupling activity level is evident on only one microphone input channel, that microphone channel should either be redirected to reduce coupling to loudspeaker audio, or recalibrated as it will need to be turned down.
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.
EF1210 USER MANUAL Check Command Syntax 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. Commands 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.
TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS MECHANICAL SPECIFICATIONS Dimensions 19” (483 mm) W x 8.2” (208 mm) L x 1.75” (45 mm) H (full rack unit) Weight 5.5 lb. Connectors Audio: Mini (3.
EF1210 USER MANUAL and CE requirements. FCC Part 15 This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
WARRANTY INFORMATION WARRANTY INFORMATION What is covered Any defect in materials or workmanship. For how long Two years. What we will do 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 replacement parts.
EF1210 USER MANUAL What this warranty does not cover This warranty does not cover defects resulting from accidents, damage while in transit to our service location, alterations, unauthorized repair, failure to follow instructions, misuse, 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.
EF1210 COMMAND SET REFERENCE EF1210 COMMAND SET REFERENCE The EF1210 Command Set is used to control an EF1210 using an RS-232 remote control device, such 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.
EF1210 USER MANUAL Command name The command name is a unique string of characters that indicates which command the EF1210 should execute. Command names for different products are not necessarily 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. Channel number The channel number indicates which input channel, reference input, zone output or memory slot the command is being applied to.
EF1210 COMMAND SET REFERENCE VALID COMMANDS AND MESSAGES The following table is a list of commands recognized by the EF1210. Table 5: EF1210 Command List Command Meaning Page ACKMOD enable/disable acknowledgment mode 56 AECn enable/disable acoustic echo canceller on channel n 58 AECSn set suppression mode on channel n.
EF1210 USER MANUAL ACKMOD - ENABLE/DISABLE ACKNOWLEDGMENT MODE 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 as NC?.
EF1210 COMMAND SET REFERENCE turns it on, and then turns off noise cancellation. This time, it gets an acknowledgment. Remote Command EF1210 Message C23NC1 C23ACKMOD? C23ACKMOD0 C23ACKMOD1 C23ACKMOD1 C23NC0 C23NC0 C23NC2 C23NC1 ASPI Digital - The Sound of DSP Technical Support: 404.892.
EF1210 USER MANUAL AECN - ENABLE/DISABLE ACOUSTIC ECHO CANCELLER ON CHANNEL N 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 microphones. 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).
EF1210 COMMAND SET REFERENCE AECSN - SET SUPPRESSION MODE ON CHANNEL N TO NORMAL OR AGGRESSIVE. Suppression Level Selection The EF1210 has been designed and carefully optimized to provide the best possible balance between removing as much vestigial echo as possible and maintaining natural, full-duplex performance when both parties speak at the same time or one party tries to interrupt the other.
EF1210 USER MANUAL EF1210 Messages Example 60 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. EF1210 Message Message meaning AECSn0 Suppression mode is currently normal on channel n. AECSn1 Suppression mode is currently aggressive on channel n. In the following example, the remote control device sets the suppression mode to normal on all channels on the EF1210 with Device ID number 7.
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).
EF1210 USER MANUAL GAINC - SET CODEC OUTPUT GAIN 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). Remote Commands EF1210 Messages Example 62 The following commands can be sent by the remote control device to set the CODEC output gain level.
EF1210 COMMAND SET REFERENCE GAININ - SET MIC/LINE INPUT GAIN ON CHANNEL N 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 signal 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.
EF1210 USER MANUAL 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. Remote Command EF1210 Message C07GAINI512 C07GAINI512 C07GAINI2? C07GAINI20 http://www.aspi.
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.
EF1210 USER MANUAL GAINRC - SET REFERENCE INPUT GAIN ON REFERENCE C 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 setting GAINRc to 20 corresponds to a lower nominal Reference input signal level of 20 dBu.
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 a new level on reference B on the same EF1210. Acknowledgment mode is enabled. Remote Command EF1210 Message C07GAINRB? C07GAINRB0 C07GAINRB4 C07GAINRB4 ASPI Digital - The Sound of DSP Technical Support: 404.892.
EF1210 USER MANUAL GAINZC - SET ZONE OUTPUT GAIN ON OUTPUT C 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 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).
EF1210 COMMAND SET REFERENCE LOCKFP - 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 EF1210 Messages Example The following commands can be sent by the remote control device to lock or unlock the front panel of the EF1210. Remote Command Effects LOCKFP0 Unlock the front panel buttons. LOCKFP1 Lock the front panel buttons.
EF1210 USER MANUAL MUTEIN - ENABLE/DISABLE MUTE ON MICROPHONE INPUT CHANNEL N The MUTEIn command mutes the microphone input channel n of the EF1210. The factory default setting for MUTEIn is 0 (not muted). Remote Commands EF1210 Messages Example The following commands can be sent by the remote control device to mute or unmute the microphone input channel n of the EF1210. Remote Command Effects MUTEIn0 Unmute microphone input channel n. n ranges from 1 to 8. MUTEIn1 Mute microphone input channel n.
EF1210 COMMAND SET REFERENCE NCN - ENABLE/DISABLE NOISE CANCELLATION ON CHANNEL N 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).
EF1210 USER MANUAL NCLN - SET NOISE CANCELLATION LEVEL ON CHANNEL N 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).
EF1210 COMMAND SET REFERENCE PING - SEE WHICH DEVICES ARE PRESENT 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 devices of a certain type.
EF1210 USER MANUAL REFASGNNC - AEC REFERENCE ASSIGNMENT The REFASGNnc command assigns reference c to input channel n of the EF1210. The factory default setting for REFASGNnc is A (Reference Input A). Remote Commands The following commands can be sent by the remote control device to change the reference channel assignment. Remote Command Effects REFASGNnc Assign reference c to channel n. c ranges either A or B. n ranges from 1 to 8. REFASGNn? Request reference assignment of channel n. Note.
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 variables that are restored as a result of this command are listed at the end of this section.
EF1210 USER MANUAL RESTNVM - RESTORE SETTINGS FROM NON-VOLATILE MEMORY IN MEMORY SLOT M 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.
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-volatile memory.
EF1210 USER MANUAL SELECTIN - SET FRONT PANEL INPUT METER TO DISPLAY INPUT CHANNEL N 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). Remote Commands EF1210 Messages Example 78 The following commands can be sent by the remote control device to set the front panel INPUT meter to display input channel n.
EF1210 COMMAND SET REFERENCE SELECTRC - SET FRONT PANEL REMOTE METER TO DISPLAY REMOTE INPUT CHANNEL c The SELECTRc command sets 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 EF1210 Messages Example The following commands can be sent by the remote control device to set the front panel REMOTE meter to display reference input channel c.
EF1210 USER MANUAL SR - CHANGE THE SAMPLE RATE The SR command changes the sample rate of the EF1210. SR16 (16 kHz) is the normal operating mode of the EF1210. The wideband (SR48, 48 kHz) mode is provided for applications that require high-fidelity noise cancellation. In the wideband mode, acoustic echo cancellation is disabled but the noise cancellation continues to function. The factory default setting for SR is 16 (normal sampling rate).
EF1210 COMMAND SET REFERENCE SWVER - REQUEST SOFTWARE VERSION The SWVER command requests the software version of the EF1210. Remote Commands EF1210 Messages Example The following commands can be sent by the remote control device to request the software version of the device. Remote Command Effects SWVER? Request the software version of the EF1210. The following message is sent by the EF1210 in response to a SWVER? command, indicating its software version. EF1210 Message Message meaning SWVERxx.
EF1210 USER MANUAL ERROR# - ERROR MESSAGE The error messages report errors that the EF1210 encounters. These are usually command 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 command 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 message from the EF1210.
EF1210 COMMAND SET REFERENCE PONG - DEVICE RESPONSE TO PING COMMAND The PONG message is sent by the EF1210 in response to a 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 USER MANUAL DEFAULT VALUES AND SAVED PARAMETER LIST Note. 84 Parameters that are in bold print indicate those affected by a RESETF, RESTNV, or SAVENV command. Parameter Default Value ACKMOD 1 (on) AECn 1 (on); n ranges from 1 to 8. AECSn 0 (normal); n ranges from 1 to 8. ERROR 1 (on) GAINC 12 (-8 dBu = -10 dBV) GAINIn 0 (0 dBu); n ranges from 1 to 8. GAINP 8 (-8 dBu = -10 dBV) GAINRc 20 (-20 dBu); c is either A or B. GAINZc 12 (-8 dBu = -10dBV); c is either A or B.
APPLICATIONS APPLICATIONS DISTANCE LEARNING Student microphones (Push to Talk) Instructor microphone CH 1 ZONE A AEC A OUT 1 RS-232 CH 2 OUT 2 CH 3 OUT 3 CH 4 OUT 4 EF1210 CH 5 OUT 5 CH 6 OUT 6 CH 7 Auto Mixer REC AUX IN EF200 (Optional) CODEC TO REMOTE FROM AEC OUT 7 CH 8 FROM REMOTE TO AEC OUT 8 Logic Port Ca m er a PSTN auto-reverse TAPE RECORDER VCR 12:00 Figure 17.
EF1210 USER MANUAL Judge CH 1 ZONE A AEC A OUT 1 RS-232 Direct Output Plaintiff CH 2 OUT 2 Direct Output Defendant CH 3 OUT 3 Direct Output Witness CH 4 Podium CH 5 OUT 5 Clerk CH 6 OUT 6 Direct Output OUT 7 Direct Output OUT 8 Direct Output OUT 4 EF1210 Well Jury CH 7 CH 8 REC AUX IN Auto Mixer Direct Output Direct Output 8-Channel Recorder COURTROOMS FROM REMOTE TO AEC EF200 (Optional) CODEC TO REMOTE FROM AEC Line Output Logic Port Jury PSTN Gallery Figure 18
ASPI Digital - The Sound of DSP Phantom Level adjust Phantom Level adjust D/A + - Phantom Level adjust A/D ECNC Line Mic/Line 2 Technical Support: 404.892.
EF1210 USER MANUAL CONNECTOR PINOUTS ASPI Bus ASPI BUS IN 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. ASPI BUS OUT RS-232 Port (9600 8-N-1) REMOTE CONTROL RS-232 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).
CONNECTOR PINOUTS Note The information below lists manufacturer information for the Phoenix connector that we use: Manufacturer: 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.
EF1210 USER MANUAL CONNECTING BALANCED EQUIPMENT TO UNBALANCED EQUIPMENT CONNECTING UNBALANCED RCA TO BALANCED MINI PHOENIX RCA Male Mini (3.5 mm) Phoenix Tip + 1 Black - 2 Shield 3 Red Red Black Ring Figure 20. Cable construction for connecting unbalanced RCA to balanced mini Phoenix (3 conductor terminal block). 1. 2. 3. 90 Connect RCA Tip to Phoenix pin 1. Connect RCA Ring to Phoenix pin 2. Connect Phoenix pin 3 to Shield, and leave Shield floating on RCA end.
ECHOFREE™ EFPANEL CONTROL SOFTWARE USER MANUAL ASPI Digital - The Sound of DSP Technical Support: 404.892.
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 EFPanelUM-0100-99 A-2 http://www.aspi.
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.
EF1210 USER MANUAL EF Device Selector Figure 21. EF Device Selector on EFPanel This selector has two purposes: 1. 2. It displays a list of all EF Devices that are connected together via the ASPI Bus. 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.
THE EF1210 OPTIONS PAGE THE EF1210 OPTIONS PAGE Figure 22. EF1210 Options Page on EFPanel 1. 2. 3. 4. 5. 6. 7. 8. ASPI Digital - The Sound of DSP FILE MENU. This menu gives you options to load and save different saved configurations. You can open or save a configuration to a file, restore factory default settings, or restore a configuration from non-volatile memory. OPERATING MODE. Allows you to choose between two modes: Echo and Noise Cancellation mode and Wideband Noise Cancellation mode.
EF1210 USER MANUAL 9. A-6 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.
CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE Note. To calibrate the EF1210 using the EFPanel control software, you need to be able to see the EF1210 front panel LED meters. If you would like to exit Setup mode at any time, click on the Cancel button. All original settings before you entered Setup will be restored.
EF1210 USER MANUAL • The default choice is pink noise played in both Zone A and Zone B. • Choose “No noise generated” for 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. iii. You will need a Sound Level Meter (SPL Meter) for this step.
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. Figure 24.
EF1210 USER MANUAL 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 amplification level. For this step, you should ensure that the microphones have been returned to their normal operating location and orientation.
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.
EF1210 USER MANUAL 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. ii. Select Reference input source to calibrate. Choose either Reference A (AEC A) or Reference B (AEC B). Establish live connection to remote site(s) and have the remote party talk normally.
CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE other Reference in step i. Caution! v. 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. Once the AEC Reference Inputs have been calibrated, click on the Next button to proceed to Playback/Record calibration.
EF1210 USER MANUAL i. Adjust CODEC output level. Adjust it to -10 dBV (-8 dBu) or to 0dBu to match the level required by your CODEC. Note. ii. The CODEC output level is also adjustable from -20 dBu to 0 dBu using the UP and DOWN arrows on EFPanel. 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 proceed to Zone/Reference setup.
CALIBRATING THE EF1210 WITH EFPANEL CONTROL SOFTWARE i. Select the Reference Channel for each Input channel. Note. ii. 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).
EF1210 USER MANUAL • • A-16 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 memory 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.
EFPANEL FOR THE EF200 PHONE ADD EFPANEL FOR THE EF200 PHONE ADD DIALER Figure 29. EF200 Dialer on EFPanel Control Software • • • • • • ASPI Digital - The Sound of DSP DIALER KEYPAD. Use this keypad to dial a phone number, or use the keypad on a computer keyboard to type the phone number. The phone number that are dialing appears in the status bar of EFPanel. FLASH. This button works much like the “flash” button on many telephones, used for call waiting features.
EF1210 USER MANUAL PHONE BOOK Figure 30. EF200 Phone Book on EFPanel Control Software • • • • • A-18 DIAL. Dials the phone number that is highlighted (the phone number that you have chosen). HANG UP. Hangs up the EF200. ADD. Add a phone number to your phone book. EDIT. Edit the names or phone numbers in your phone book. DELETE. Delete an entry in your phone book. http://www.aspi.
EFPANEL FOR THE EF200 PHONE ADD EF200 OPTIONS Figure 31. EF200 Options Page on 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 HANGUP. Enable/disable auto hangup mode. AUTOMATIC GAIN CONTROL. Enable/disable automatic gain control. FRONT PANEL LOCK. Lock/unlock front panel (enables/disables front panel buttons).
EF1210 USER MANUAL • ENABLE DTMF COMMANDS. Enable/disable a series of built-in commands triggered 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 command, you specify a two digit command code plus a payload. Table 8: Built-in DTMF commands CODE COMMAND NAME PAYLOAD OPTIONS AG AGC 0, 1, 2 GP GAINP *5, *4, *3,..., 0,..., 03, 04, 05 The ‘*’ character is used as a minus sign.
