Digital Voice Systems VC-20-ATC-10B, User Manual

Page 1: ...The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC 10100110101110101001 101111010100110101...

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Page 3: ...VC 20 ATC 10b Vocoder Board User s Manual The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC VC 20 ATC 10B Vocoder Board USERS MANUAL Version 1 0 August 1999...

Page 4: ...al However Digital Voice Systems Inc makes no warranties with respect to the documentation and disclaims any implied warranties of merchantability and fitness for a particular purpose Digital Voice Sy...

Page 5: ...f DVSI is granted under this Agreement 2 2 END USER shall not copy extract de compile reverse engineer or disassemble the AMBE Voice Compression Software contained in the VC 20 ATC 10b Vocoder Board 2...

Page 6: ...20 ATC 10b Vocoder Board or AMBE Software is assumed by the END USER After expiration of the warranty period END USER and not DVSI or its employees assumes the entire cost of any servicing repair or...

Page 7: ...Regulations DVSI neither represents that a license is not required nor that if required it will be issued by the U S Department of Commerce Licensee shall assume complete and sole responsibility for...

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Page 9: ...IC OPERATION 3 2 3 SPECIAL HANDLING AND STORAGE PRECAUTIONS 4 Section 33 BOARD SET UP CONFIGURATION 5 3 1 CONNECTION SPECIFICATIONS 5 3 2 DIN41612 96 PIN CONNECTOR SPECIFICATIONS 6 3 3 VC 20 ATC 10BCO...

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Page 11: ...tion thereof signifies acceptance of these licensing terms The VC 20 ATC 10b operates by digitizing an analog speech signal using an on board A to D converter This digitized speech is then processed b...

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Page 13: ...ed circuits 2 2 VC 20 ATC 10b Vocoder Board Basic Operation Connections are made to the VC 20 ATC 10b using the attached DIN 41612 connector which is described in Sections 4 and 5 The user must supply...

Page 14: ...led and the ENSLNCE signal always indicates voice Note that for proper operation any background noise present in the speech must be short term stationary and have a level less than 25 dBm0 2 3 Special...

Page 15: ...dance 600 ohm Sensitivity 0 dBm0 0 dBm Sinusoidal Overload 3 17 dBm0 Nominal Level 23 dBm0 average speech level Dynamic Range 10 dB relative to Nominal Level Noise Level 72 dBm0 Bandwidth 0 3700 Hz An...

Page 16: ...vd Input RXD0 10 Rsvd Rsvd Input RXCK 11 Input FMDE Rsvd Rsvd 12 Rsvd Rsvd Rsvd 13 Gnd GND Rsvd Gnd GND 14 Rsvd Rsvd Rsvd 15 Output TXD2 Rsvd Input DINRS 16 Output TXD1 Rsvd Rsvd 17 Rsvd Rsvd Output D...

Page 17: ...ound TXD3 O Transmit data channel TXD2 O Transmit data channel TXD1 O Transmit data channel TXD0 O Transmit data channel TXCK I Transmit data bit clock 4 8kHz FMEN I Encoder frame flag Active High RXD...

Page 18: ...96 voice bits plus 4 control bits of each 20ms voice frame are input in the first 25 RXCK cycles RXCK 9 6 kHz The first RXCK cycle contains a 4 bit control word and the remaining 24 RXCK cycles contai...

Page 19: ...VC 20 ATC 10b reset signal An active high level on DINRS for a duration of at least 300ns will reset the VC 20 ATC 10b DINRS will generate RESX and RESET The VC 20 ATC 10b will pull this signal to its...

Page 20: ...ly and outputs a silence frame on TXD during the next 20 ms frame The relationship between FMEN GO and TXD is shown in Figure 1 If left unconnected GO is pulled to its active state high TXD Silence Fr...

Page 21: ...On board jumpers Connector Signals Jumper Signal 1 Connects on board 9 6 kHz data clock to TXCK 2 Connects on board 9 6 kHz data clock to RXCK 3 Connects on board 20 ms frame clock to FMEN 4 Connects...

Page 22: ...lock cycles of TXCK and simultaneously outputs LSB first four bits of data on DTMF_DAT which identify the DTMF tone which was detected The DTMF_DET flag is only output once for each continuous DTMF to...

Page 23: ...Solutions 4 1 Technical Support If you have any problems with the VC 20 ATC 10b or have questions about its operation please contact Digital Voice Systems Inc 234 Littleton Road Westford MA 01886 USA...

Page 24: ...NOTES...

Page 25: ...s Manual page 15 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC TXD3 0 TXCK FMEN FMDE RXD3 0 RXCK ENCODER DECODER Figure 2 VC 20 ATC 10b Connections In Loop back Mode On Board Clock Fra...

Page 26: ...TXD3 0 TXCK FMEN FMDE RXD3 0 RXCK ENCODER DECODER MODEM Figure 3 Connections between VC 20 ATC 10b and a Modem VFXI VFRO GO...

Page 27: ...Specialists DIGITAL VOICE SYSTEMS INC FMDE RXD3 0 RXCK ENCODER 2 DECODER 2 Figure 4 Dual VC 20 ATC 10b ENCODER 1 DECODER 1 On Board Clock Frame Generator 1 FMEN TXCK FMEN TXCK FMDE RXCK TXD3 0 TXD3 0...

Page 28: ...Figure 5 VC 20 ATC 10b Signal Timing TXXK FMEN TXD3 0 500 ns RXCK FMDE 500 ns 20 ms 20 ms GO N A RXD3 0...

Page 29: ...VSI Services Support VC 20 ATC 10b Vocoder Board User s Manual page 19 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC RUN 12 5ms 20ms Figure 6 RUN Signal Timing 7 5ms Encoder Window Deco...

Page 30: ...Figure 7 VC 20 ATC 10b Physical Dimensions bottom view 3 0 mm 5 5 mm 41612 Connector 112 mm 100 mm 7 5 mm side view 11 mm 7 5 mm 112 mm components 12 5 mm connections 2 mm...

Page 31: ...SI Services Support VC 20 ATC 10b Vocoder Board User s Manual page 21 The Speech Compression Specialists DIGITAL VOICE SYSTEMS INC TXD Silence Frames Voice Frames GO FMEN Voice Frames Voice Frames Sil...