Philips SPENDEX 40 Maintenance Manual page 10
Speech encryption decryption equipment
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Also See for SPENDEX 40:
- Operating manual (25 pages) ,
- Operating instructions manual (21 pages)
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NATO CONFIDENTIAL
S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
3 . 1 . 3
C o n n e c t i n g
b o a r d
U A
8 3 1 0 / 0 0
The connecting board contains:
- the microphone amplifier
- the low pass filter transmitting side
- the A/D-converter
- the D/A-converter
- the low pass filter receiving side
- the telephone amplifier
- the CIK-interface
- t h e fi l l - g u n i n t e r f a c e
- the CCITT-V28/EIA RS232 data interface
- a clear/secure relay
- the analogue-loop relay
- a +12/+5 V power converter
- a -12/-5 V power converter
- a zeroise switch
3 . 1 . 4
S y n t h e s i s
b o a r d
U A
8 3 2 3 / 0 0
The synthesis board contains:
- the DFT-processor
- the pitch processor
- synthesis processor 1
- synthesis processor 2
- the vocoder controller
- the vocoder program memory
- the vocoder data memory
- the vocoder address decoder
- a t i m i n g c i r c u i t
- the master clock signal generator
3 . 1 . 5
A n a l y s i s
b o a r d
U A
8 3 2 2 / 0 0
The analysis board contains:
- the segmentation buffer
- the pitch buffer
- the speech buffer
- the analysis processor
- a timing circuit
- the slave clock signal generator
3 . 1 . 6
K e y
m e m o r y
b o a r d
U A
8 3 2 1 / 0 0
The key memory board contains:
- program memory 2 (U EPROM)
- the zeroise memory
- the key variable memory
- t h e z e r o i s e c i r c u i t
- a zeroise switch
9 9 2 2
1 5 4
1 3 4 3 1
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