Motorola Confidential Proprietary
Test Procedures
Service Manual
49
BER Measurements
DIGITAL MEASUREMENTS
%
Ampli tude
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
Di sarm
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.
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%
.
BER Measurements
Содержание T2290
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