VOICECRAFTERTM 3000 Series Echo Canceling Audio System operation manual ® ! " # $% & '(())) *
VOICECRAFTERTM TABLE OF CONTENTS TABLE OF CONTENTS 1. FRONT PANEL FEATURES .............................................................................. 2 2. REAR PANEL FEATURES ................................................................................ 3 3. CONNECTOR PIN-OUTS ................................................................................... 4 4. CONFIGURATION .............................................................................................. 5 5.
VOICECRAFTERTM FRONT PANEL FEATURES 1. FRONT PANEL FEATURES ® BIAMP SYSTEMS MUTE VOICECRAFTERTM 3000 POWER SEND VOLUME POWER RECEIVE System Status Figure 1-1. Voicecrafter 3000 Series Front Panel When both Send and Receive LED’s blink Green: Indicates that the Voicecrafter is performing a Train cycle. When both Send and Receive LED’s blink Amber: Indicates that the Voicecrafter is in System Mute mode.
VOICECRAFTERTM REAR PANEL FEATURES 2. REAR PANEL FEATURES TO TRAIN THIS UNIT, PRESS AND HOLD THE "MUTE" BUTTON UNTIL TRAINING STARTS. AUDIO OUT POWER 2-WIRE PSTN LOCAL/REMOTE CONTROL PHONE AUX CODEC IN SPEAKER LINE OUT OUT MICROPHONE OUT 1 2 IN LINE Figure 2-1. Voicecrafter 3000 Series Rear Panel POWER - Connects Voicecrafter to external DC power supplies.
VOICECRAFTERTM CONNECTOR PIN-OUTS 3. CONNECTOR PIN-OUTS MIC 2 (Line Level) MIC 1 & MIC 2 (Mic Level) 2 Pin 1 - Chassis Gnd. or Shield Pin 2 - Signal (-) Pin 3 - Signal (+) 1 3 2 1 3 CODEC IN & OUT Pin 1 - Chassis Gnd. or Shield Pin 2 - Signal Ground 2 3 Pin 3 - Signal High Z (Unbalanced) 600 Ohm (Balanced) Pin 1 - Chassis Gnd.
VOICECRAFTERTM CONFIGURATION 4. CONFIGURATION 4.1 INTRODUCTION 4.3 RESULTS OF TRAINING This chapter describes how to configure the Voicecrafter, and also defines terms which are related to the Voicecrafter. After a Configuration Train cycle is initiated by means of the User Control Interface (software), the Voicecrafter will provide resulting information from the Train cycle. The Voicecrafter will send out an AERL value and an ERLE value. 4.
VOICECRAFTERTM CONFIGURATION Placement of microphones in relation to speakers is essential for proper training values. If a microphone is too close to a speaker, the Voicecrafter may set microphone or speaker gains to low, which will affect the AERL. Microphone default settings also play an important part in determining AERL and ERLE values. When connecting a microphone mixer directly into a Voicecrafter, be sure that Mic 2 is set for line level input.
VOICECRAFTERTM USER CONTROL INTERFACE 5. USER CONTROL INTERFACE (Software) 5.1 INTRODUCTION This chapter describes the SC-300 User Control Interface software for Windows®, which is provided for configuration of the Voicecrafter. 5.2 INSTALLATION Install the SC-300 User Control Interface as described on the software disk label. Connect an open PC comm port to the upper 9-pin female port on the back of the Voicecrafter, using a standard 9-pin male to 9-pin female RS-232 serial cable.
VOICECRAFTERTM USER CONTROL INTERFACE Input Mode: Selects between Mic level, Unbalanced line input, or Balanced line input. Change Input Mode using F2 and F3 (Mic 2 input only). 5.3.2 ACOUSTIC SCREEN The ACOUSTIC screen (see Figure 5-2) is designed to be used by a system installer for proper set up of the Voicecrafter. Speaker AERL: Sets the target AERL to be used during a Train cycle Gain: Displays current Speaker Gain.
VOICECRAFTERTM USER CONTROL INTERFACE Config Memory Store: Brings up the Store menu for storing Voicecrafter parameters. When STORE CONFIG? is displayed, select appropriate memory location for settings to be stored (F1~F5). When F1 has a configuration stored, the unit will recall F1 settings upon power up. Only Configuration Train settings will be saved (manual adjustments to Mic Gain and Speaker Gain will not be saved).
VOICECRAFTERTM USER CONTROL INTERFACE These adjustments to the CODEC Input Gain level are used to compensate for different audio signal levels from a Video CODEC or 4-wire network. The user should follow the audio signal level recommendations of the video codec manufacturer or network provider. In typical networks, this signal level is approximately 0dBm and will be within the operational capability of the Voicecrafter factory preset range.
VOICECRAFTERTM USER CONTROL INTERFACE MIC #2 - Mic #2 is looped back to Speaker output. MIC #1 & #2 - Mic #1 & Mic #2 looped back to Speaker output. 4-Wire: Displays the current state of the 4-Wire loopback. Pressing F2 or F3 will cycle through the various loopback modes available. They are as follows: OFF - No loopback process. CODEC LOOP - CODEC IN signal is looped back to CODEC OUT. AUX/VCR LOOP - Signal from AUX IN is looped back to AUX OUT (only when Bridged mode is selected).
VOICECRAFTERTM USER CONTROL INTERFACE Hold Time: Displays the amount of time it takes for the noise gate to activate, once the room has become silent. Decay Time: Displays how quickly the noise gate will suppress noise, once the room has become silent. 5.3.5 ADVANCED SCREEN The ADVANCED screen (see Figure 5-5) is used to make adjustments to the TNG (Transmit Noise Gate), and to the modem connection through the lower DB9M port.
VOICECRAFTERTM INSTALLATION 6. INSTALLATION MICROPHONE: Connect mics to XLR connectors labels MIC 1 and MIC 2 on the Voicecrafter. 6.1 TOOLS BIAMP Systems recommends using the SC-300 (User Control Interface software) when installing and setting up any Voicecrafter product. In some applications a Hand-Held Terminal may be used instead.
VOICECRAFTERTM INSTALLATION BRIDGE MODE: Connect Aux Out to the input of the device to be ‘bridged’ into the conference. Connect Aux In to the output of the device being ‘bridged’ into the conference. 3. Place a sound pressure level meter (SPLM) at the microphone location. Adjust noise source level until SPLM measures 72dB.* 4. Using the SC-300 User Control Interface software, go to the ACOUSTIC screen and click on DSP AVE. Click on F3 until EC_Si is displayed. 5.
VOICECRAFTERTM CONNECTING EXTERNAL EQUIPMENT 7. CONNECTING EXTERNAL EQUIPMENT 7.1 INTRODUCTION 7.2.2 CALIBRATION This chapter describes the procedure for installing and configuring external equipment for use with the Voicecrafter. The Voicecrafter supports the use of an external microphone mixer and/or an external power amplifier. An external microphone mixer is required when providing more than two microphones. An external power amplifier is required when providing distributed loudspeaker systems.
VOICECRAFTERTM CONNECTING EXTERNAL EQUIPMENT 7.3 EXTERNAL AMPLIFIER WITHOUT LOCAL REINFORCEMENT (ACOUSTIC screen). Use F2⇐ or F3⇒ to display EC_Si. EC_Si is a momentary reading, and is only updated by clicking DSP AVE again. The Voicecrafter has a line level audio output that is capable of driving external power amplifiers. This line level output is provided on a rear panel RCA jack labeled LINE OUT. 6. Adjust the external mixer output for nominal level (see paragraph 7.2.2).
VOICECRAFTERTM CONNECTING EXTERNAL EQUIPMENT 5. Adjust the gain of the external amplifier so that a sound pressure level of 72dB is produced at the sound pressure level meter. 7.3.2 CALIBRATION The external amplifier needs to be calibrated for the output level expected by the Voicecrafter. Use the following procedure to calibrate the amplifier: 6. Disable the Voicecrafter white noise generator by clicking on the Noise button (ACOUSTIC screen) and using F3⇒ to set white noise to DIS (disable).
VOICECRAFTERTM CONNECTING EXTERNAL EQUIPMENT 2. Use a sound pressure level meter to measure the noise level at one of the microphone locations. 7.4.1 INSTALLATION Connect a ‘mix-minus’ output of the mixer (containing only near end signals) to the Mic 2 input of the Voicecrafter. Connect Line Out of the Voicecrafter to an auxiliary or un-used input of the mixer. Connect a ‘composite’ output of the mixer (containing both near end and far end signals) to the input of the amplifier.
VOICECRAFTERTM CONNECTING EXTERNAL EQUIPMENT 7. Activate the Voicecrafter white noise generator by clicking on the Noise button (ACOUSTIC screen). Use F3⇒ to set white noise to ENA (enable). At this point, white noise (hiss) should be audible from the loudspeakers. If not, check amplifier level, speaker wiring, and power. (The Receive LED on the Voicecrafter will be green when white noise is being generated.) 10.
VOICECRAFTERTM TROUBLESHOOTING 8. TROUBLESHOOTING 8.1 8.2.4 POOR PERFORMANCE AFTER INSTALLATION INTRODUCTION If you encounter problems getting the system to perform as expected, these troubleshooting tips should be helpful. 8.2 1. Train again, listening for improved performance. 2. Check wiring to/from Voicecrafter. 3. Ensure that proper settings for the microphones have been selected. 4. Check mic orientation: be sure they are facing away from loudspeakers. 5.
VOICECRAFTERTM TROUBLESHOOTING 3. If the Voicecrafter is set at moderate loudspeaker volume levels: Option 1: Adjust NLP Near End Noise preset (DIAGNOSTIC screen). Option 2: Train with mic in bass cut position. Option 3: Add acoustic treatment. 4. If high local loudspeaker volume: Option 1: Increase AERL Target by 2~4dB; Train (ACOUSTIC screen). Option 2: Adjust NLP preset (DIAGNOSTIC screen). Option 3: Train with mic in bass cut position. Option 4: Add acoustic treatment. 3.
VOICECRAFTERTM TROUBLESHOOTING 8.2.12 LOCAL DISTORTION 8.3 REASONS FOR ADJUSTMENT 1. Verify that loudspeakers and wiring provide a minimum load of 4 ohms, when using the internal amplifier. 2. Reduce far end noise. If the Receive LED turns amber during distorted far end speech, then the Voicecrafter is being overdriven by the codec. Adjust the Codec Input Gain Offset by clicking the Input Gain Offset button under Codec (NETWORK screen), and using F2 and F3 to change gain settings. 8.3.
VOICECRAFTERTM TROUBLESHOOTING 8.3.3 WIRE SEND AND RECEIVE LEVELS 8.3.4 ACOUSTIC ECHO RETURN LOSS TARGET (AERL) Symptom: • Distortion on the loudspeaker signal at high volume far end speech. Adjustment: • Any codec or CLI with nominal audio levels greater than -20dB (when used with models VC3000 or VC3010) or 0dB (when used with models VC3001 or VC3011) may require adjustment of Voicecrafter Codec levels.
VOICECRAFTERTM DTMF DIALING & BTV MODE 9. DTMF DIALING & BTV MODE 9.1 DTMF DIALING The following tables list the s-Commands and t-Commands that support the Voicecrafter two-wire dialing feature. The Voicecrafter is capable of dialing the full set of DTMF digits (0-9, A-D, *, and #). The DTMF digits A, B, C and D are not normally included on standard telephone sets. These digits are used by some communication systems for auxiliary signaling.
VOICECRAFTERTM DTMF DIALING & BTV MODE Table 9-2. Dial Mode t-Commands Description DTMF Mix Command (XX) Values (yyyy) 0xEC 0x00 0x01 0xFFFF DTMF Pause 0xED 0x10 0x0100 DTMF Duration 0xEE DTMF Attenuation 0xEF 0x10 0x0100 0xFF00 0xFFFD Dial Mode 0xF0 0x00 0x01 0xFFFF Setting this parameter to zero disables the DTMF Mix feature. Setting this parameter to a non-zero value enables the DTMF Mix Feature. Any DTMF tones generated will be audible in the conference mix.
VOICECRAFTERTM SPECIFICATIONS 10. SPECIFICATIONS )* +,-.** + % # '/ 0** +,01** + % # ' 2 3!45! 67-889 67-.. 67-.
17 18 Mic 1 49 16 16 bit A/D +30dB 600W Balanced w/ Phantom PWR 27 Figure 10-3.
VOICECRAFTERTM GENERAL INFORMATION 11. GENERAL INFORMATION 11.1 Codec - A device which produces a coded output from an analog input and vice versa. GLOSSARY OF ECHO CANCELING TERMS Acoustic Coupling - Loudspeaker signal which is picked up by the microphone(s). Convergence – Echo canceller adaption to changes in the conference environment. Acoustically Dead - A conference room environment with surfaces which reflect very little sound.
VOICECRAFTERTM GENERAL INFORMATION EQ Setting - Refers to the switch, available on many conference microphones, which boosts and/or cuts select frequencies. 11.2 ACRONYMS, ABBREVIATIONS AND SYMBOLS A - Amperes Far End - A remote or distant site, located at the opposite end of a conference transmission line. AERL - Acoustic Echo Return Loss Gain - Volume. ASIC - Application Specific Integrated Circuit Near End - The local site on a conference transmission line.
VOICECRAFTERTM GENERAL INFORMATION HHT - Hand-Held Terminal RCV - Receive Hz - Hertz SND - Send LED - Light Emitting Diode V Volts kHz - Kilohertz VDC - Volts Direct Current mSec - Milliseconds W - Watts NLP - Non-Linear Processor - Ohms PC - Personal Computer RAM - Random Access Memory 30 -
WARRANTY BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL.
WARNING FCC COMPLIANCE WARNING: Changes or modifications to these units not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been test and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
EQUIPMENT ATTACHMENT LIMITATIONS NOTICE: The Canadian Department of Communications label identifies certified equipment. This certification means that it meets certain telecommunications, network protective, operational, and safety requirements. The Department does not guarantee the equipment will operate to the users satisfaction. Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company.
