Speech Loopback - Wavetek IS-136 MS Operating Instructions Manual

Speech Loopback

Speech Loopback
WHY?
Requirement
HOW?
D
Acoustic check of the entire speech-signal transmission
in the mobile (transmit and receive).
The mobile is not in test mode.
Make the general test preparations. The channel type
must be To digital TC.
Initiate a call with
{MOBILE}
in a digital traffic channel).
Press in the basic test mask.
{SP-LOOP}
Speak into the microphone of the handset. The test set
sends the digital speech signal transmitted by the
mobile (with a delay of about 1 s) back to the mobile
unaltered.
Test Results
Loudspeaker of handset must reproduce words spoken into
microphone with brief delay and as little distortion as possible:
a unique opportunity of telling yourself a lot of nice things.
IS-136 MS
or (the mobile must be
{CELL.}
10
10-31