Motorola iDen i850 Field Service Manual page 85

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.
Set up the R-2660 for iDEN BER
Test, and connect the unit to the RF
IN/OUT connector.
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.
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
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
Pass
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
68P80400P94-O
FIELD LEVEL TEST MODES AND PROCEDURES: Bit Error Rate (BER) Test
Press Start
is < 0.07%.
Pass
Note: Ensure that the maximum cable
loss does not exceed 2 dB.
Lower
Gen: to -109 dBm
than 200 Hz.)
Repeat the
above test using
Pass
900BER2 and
900.98125 for
Note: Change offset on R2660 to +39 MHz for 900
900BER3.
MHz (900BER1, 900BER2, and 900BER3).
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).
The monitor frequency is 806.0125
(Carr#1) for BER1.
Replace the
Fail
Main board, and
repeat the test.
Fail
Replace the
Main board, and
repeat the test.
Replace the
Fail
Main board, and
repeat the test.
Unit passed test. Look for system,
coverage, accessory, or software problems.
8-7