Motorola I580 service manual Signal Quality Error SQE Test, R-2660

FIELD LEVEL TEST MODES AND PROCEDURES: Signal Quality Error (SQE) Test

8.5Signal Quality Error (SQE) Test

Use this test on a unit having any of the following symptoms: No service failures or poor SQE/RSSI (poor performance in known good coverage area).

Set up the R-2660 for iDEN

Mobile operation, and connect the

unit to the RF IN/OUT

connector. See Figure 7-1 on page

7-3.

Notes:

1.Watch unit for resetting during this procedure.

2.Master reset can be completed on the unit by pressing Menu, Settings, Security.

3.Registration and calls might take over 1 minute to complete.

4.See the Strong Signal Environment section in Chapter 7.

Connect the regulated battery

eliminator to the unit to be

tested. Set the power supply 7.0

Vdc.

Power

up the unit. Enter

Initial Registration mode (see

Fail

Perform the Registra-

Pass

Operating

the R-2660.)

Press Start.

tion/Call test.

The Call

SEQ: 1 thru 6 lights up

when unit has

Verify that

registered.

the unit can complete an

SQE Reference Chart

interconnect call. Press End/Home

Gen

SQE Level

until the unit displays Ready. Press Intercon-

Fail

nect (3:1 or 6:1) and Start on the R-2660. Wait

for the

-70 dBm

>26

green LED to light. Press Send on the unit.

-80 dBm

>25

Note: Leave call connected for

the next test.

Perform the

-90 dBm

>23

Registration/Call test.

-100 dBm

>20

Pass

Place unit

in Debug Mode (see

Entering Debug Mode). Press

Trace to monitor the SQE & TX level. Fail Press RF in the R-2660 and arrow down to Gen:.

Verify that it is set to -70dBm.

Verify that the SQE is

greater than

26.

Pass

Note: Gen levels in the SQE chart include RF Adapter losses.

Replace the

Main board.

Change

Gen: to -80 dBm, and

check the SQE Reference chart to	Fail
verify the unit’s SQE per Gen:
output using the
chart.	Unit passed test. Look for
Pass	system, coverage, accessory, or
	software problems.

Replace the Main board.

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