Philips SPENDEX 40 Maintenance Manual page 51

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
I
6 . 3 . 6 V o c o d e r t e s t
In the vocoder test substate it is possible to test the vocoder.
-
Actions
LED
Display
Remarks
Start conditions:
- Apparatus on hook
"TESTMODE"
Apparatus in
test wait state.
1. Key in test code 5.
2. Go off hook.
3. Press # key.
4. Speak into the
microphone.
5. Go on hook.
6. Press P key.
"VOC TEST"
"VOC TEST"
"SPEAK ! "
"SPEAK ! "
"%V0C0M "
"TESTMODE"
Apparatus in
vocoder test
substate.
The vocoder is
looped.
The speech must
be audible in
the telephone.
Apparatus back
to test wait
s t a t e .
Vocoder test - fault finding table
"
F a i l u r e
Suspected module
- No sound audible in the telephone.
- No speech recognisable.
• Handset
• Connecting board
• Analysis board
• Synthesis board
• Analysis board
• Synthesis board
• Connecting board
• Handset
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NATO CONFIDENTIAL
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