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Service Manual
BER Measurements
Figure 37. Digital Measurements Screen
DIGITAL MEASUREMENTS
DTC Meas
BER
Arm
Disarm
Ampli tude
Traffic Chan
-110.0
333
dBm
Slot
1
DVCC
1
BER Bits
Cntrl Chan
10000
42
Trig Type
DCCH DVCC
2x Frame
128
PCS Mode Handset 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
Display prompt " Y" (enter band, 0 =
800, 1 = 1900)
5
Set power level to step 2 (122#)
6
Turn on transmitt carrier (05#)
The BER measured on the communications
analyzer must be less than or equal to 3%.
Loopback BER
%
2.8995
Bits Read: 10140
To Screen
CALL CNTL
CALL CNFG
ANLG MEAS
SPEC ANL
DIG MEAS
More
Motorola Confidential Proprietary
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 Procedures
BER Measurements
49
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