Test Setup - Wavetek IS-136 MS Operating Instructions Manual

IS-136 MS

Test Setup

Levels of < –110 dBm appear when testing (eg bit error rate BER), so the entire
setup must be proof against EMI pickup and not radiate any either. The following
measures are recommended for this purpose:
•
Use a doubly shielded RF cable between the test setup and the mobile.
•
Terminate the RF DIRECT socket of the test setup with 50 Ω.
•
Make sure that all plug-ins of the test setup (back panel) are screwed in tight.
•
Close vacant plug-in slots on the test setup (back panel) with dummy panels.
Fig. 10.4: Test setup with IS-136 carphone (handset + transceiver). The test adapter is not
necessary for the described signaling tests. The test adapter couples out the microphone
signal and the loudspeaker signal so that the usual analog tests can also be performed on
IS-136 mobiles (eg modulation frequency response, SINAD).

Use the supplied BNC/BNC cable (382 678) to connect socket Bu 103 of the IF
unit (back panel) to socket Bu 103 of the D-AMPS unit (see appendix). Without
this connection no call can be set up to the mobile.
10-8
Transceiver
Test Setup
Handset
Test adapter