Motorola Timeport P8190, Service Manual

Page: 49 / 149

Test Procedures
37
Motorola Confidential Proprietary
Introduction
The phone allows keypad controlled testing
of various analog and digital operating pa-
rameters.
This chapter includes the keypad button
functions and recommended equipment
setup to use when testing a phone.
Automatic Call-Processing Tests
Most communications analyzers can simu-
late a cell site in order to perform automatic
call-processing tests. Automatic call process-
ing tests can be performed while the phone
is in its power-up state. However, it is useful
to do the tests with the phone in Test Mode
Status Display.
Refer to the communications analyzer’s
manual for details about performing call-pro-
cessing tests. The following call-processing
test sequence is recommended:
1. Inbound call, analog mode
2. Outbound call, analog mode
3. Analog-to-Analog channel handoff
4. Analog-to-Digital channel handoff
5. Inbound call, digital mode
6. Outbound call, digital mode
7. Digital-to-Digital channel handoff
8. Digital-to-Analog channel handoff
Handoffs should be performed between low,
middle, and high frequency channels, such
as, 991 (lowest frequency), 333 (middle fre-
quency), and 799 (highest frequency). In digi-
tal mode slots 1 & 4, 2 & 5, and 3 & 6 should
be verified.
Analog Test Measurements
• RX Sensitivity (SINAD)
• RX Audio Distortion
• TX Power Out
• TX Frequency Error
• TX Audio Distortion
• TX Maximum Deviation
• TX SAT Deviation
• TX ST Deviation
Digital Test Measurements
• Digital RX Sensitivity (BER)
• Digital Power Out
• TX Frequency Error
• Digital Modulation Stability (EVM)
The analog and digital parameters are stored
in EPROM on the Transceiver Board. Each
transceiver is shipped from the factory with
these parameters already calibrated. How-
ever, if a board is repaired, these parameters
should be measured and, if necessary, ad-
justed. Checking and adjusting calibration
parameters is also useful as a troubleshoot-
ing/diagnostic tool to isolate defective assem-
blies.