Manual Test Procedures; Introduction; Call-Processing Tests; Non-Signalling Test Measurements - Motorola A920 Service Manual

Introduction

The phone allows keypad and computer controlled test-
ing of various digital test parameters.
This chapter includes the keypad/computer functions
and recommended equipment setup to use when test-
ing a phone manually.

Call-Processing Tests

Most communications analyzers can simulate a cell site
in order to perform automatic call-processing tests.
Automatic call processing tests can be performed while
the phone is in standby mode.
Refer to the communications analyzer's manual for de-
tails about performing call-processing tests. The follow-
ing call-processing test sequence is recommended:
1. GSM Mobile Originated Call
2. WCDMA Mobile Originated Call
3. GSM handover
4. DCS handover
5. PCS handover
Preliminary

Non-Signalling Test Measurements

In an event that the phone exhibits RF failures that pre-
vent call processing, the service technician may need to
perform some non-signalling tests. These tests will pro-
vide information regarding which stage of the phone is
failing prior to opening the phone for troubleshooting.
The following tests will be described in this chapter.
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The digital phasing parameters are stored in a EPROM
on the Transceiver Board. Each transceiver is shipped
from the factory with these parameters already cali-
brated. However, if a board is repaired, these param-
eters should be measured and, if necessary, adjusted
with the GP-Gate System. Checking and adjusting cali-
bration parameters is also useful as a troubleshooting/
diagnostic tool to isolate defective assemblies.
Motolora Confidential Proprietary
Manual Test
Procedures
GSM/DCS/PCS TX Power Output
GSM RSSI
WCDMA TX Power Output
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