Motorola Timeport P8190, Service Manual

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Motorola Confidential Proprietary
TDMA Timeport™ P8190 Test Procedures
50
BER Measurements
DIGITAL MEASUREMENTS
%
Amplitude Traffic Chan
333
DVCC
To Screen
CALL CNTL
CALL CNFG
ANLG MEAS
SPEC ANL
DIG MEAS
More
2.8995
Loopback BER
DTC Meas
BER
Arm
Disarm
Bits Read: 10140
-110.0
Slot
1
dBm
BER Bits
10000
1
Cntrl Chan
DCCH DVCC
42
Trig Type
2x Frame 128
Figure 37. Digital Measurements Screen
BER Measurement Procedure
1 Make sure the Test Set is in Active
mode.
2 Select DIG MEAS from the To
Screen menu.
3 Select the DTC Meas field to display
a list of available tests.
4 Select BER from the list.
5 Enter the number of bits to be mea
sured in the BER Bits field. (Note: the
number of bits actually read will be
calculated in whole frames.)
6 Amplitude should be set to -110 dBm.
7 Traffic Chan to 333.
8 Slot to 1.
9 DVCC to 1.
10 Cntrl Chan to 42.
11 DCCH DVCC to 128.
12 Put the mobile into test mode and en
ter the proper test commands for BER
reading.
13 Select ARM .
14 After the actual number of bits has
been transmitted and received, the
BER should be displayed.
Test Mode Commands:
1 Enter 576# (Loopback mode)
2 11333# (Loads Synthesizer Channel)
3 Display prompt “Y” (enter desired
time slot, for this test enter 1)
4 Set power level to step 2 (122#)
5 Turn on transmitt carrier (05#)
The BER measured on the communications
analyzer must be less than or equal to 3% .
BER Measurements