Motorola i760, Руководство по обслуживанию на месте

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FIELD LEVEL TEST MODES AND PROCEDURES: Bit Error Rate (BER) Test
68P80400P94-O
8-7
8.7 Bit Error Rate (BER) Test
Use this test on a unit having any of the following symptoms: resets (RAAAA Type), No Service
failures.
Notes:
1. Confirm the reset log has errors.
2. Place the unit into Test Mode for this test.
3. Watch the unit for resetting during this procedure.
4. Verify the R-2660 has been calibrated and cable continuity is good.
5. In the United States, the Main board can only be replaced and
programmed at the factory or iDEN Radio Support Center.
6. The Power, MPX, and MOD test parameters are for factory use only
and should not be adjusted by field service personnel (see page 7-2
for default values).
Fail
Unit passed test. Look for system,
coverage, accessory, or software problems.
Fail
Press
Start
on unit. Press
TX ON
. The
RX BER
that appears on the display
should be
0.0%
at
-70 dBm
. Verify that
the
TX BER
on the R-2660
is <
0.07%
.
Pass
Connect the battery eliminator to the
unit. Remove the antenna. Set power
supply between 5.0 and 12.0 Vdc.
Power up the unit. Enter Test Mode.
Do the following:
1. Press the
Menu
key, and then the
Edit
option key.
2. Press the
Change
option key, and scroll down to
800BER1
.
3. Press
Select
to select the test.
4. Press the
Back
key, and then press
Menu
.
Fail
Pass
Lower
Gen:
to
-109 dBm
and check the
RX BER
in the
display. The BER should be less than 10%
when at
Gen: -109 dBm
. (
Freq
Error
should be less
than 200 Hz.)
Set up the R-2660 for iDEN BER
Test, and connect the unit to the RF
IN/OUT connector.
Replace the
Main board, and
repeat the test.
Replace the
Main board, and
repeat the test.
Replace the
Main board, and
repeat the test.
The monitor frequency is
806.0125
(Carr#1) for
BER1
.
Pass
Repeat the
above test using
800BER2
,
800BER3
,
800BER4; 900BER1, 900BER2,
and
900BER3
in Test Mode.
The monitor frequency is
813.5125
(Carr#601) for
800BER2
,
820.9875
(Carr#1199)
for
800BER3
, and
824.9875
for
800BER4
.
The monitor frequency is
896.01875
for
900BER1
,
898.51875
for
900BER2
and
900.98125
for
900BER3
.
Note:
Ensure that the maximum cable
loss does not exceed 2 dB.
Note: Change offset on R2660 to +39 MHz for 900
MHz (900BER1, 900BER2, and 900BER3).