User Guide

Nokia Customer Care

RM-1

RF Troubleshooting

Company Confidential

7A - 15

Issue 1

2.8 GSM transmitter self test (ST_CDSP_GSM_TX_POWER_TEST)

This test verifies if GSM transmitter can transmit power.

Test covers: RFIC Vinku (N7501), modulator, IC gain control stages, filter/balun solder joints,

GSM PA (N7502), PA bias lines & DACs, RFBUS, TX power detector functionality, VBAT_ASIC,

VBAT_PA.

Test does not cover: Antenna functionality, RX/TX-switch functionality, TX signal quality

Error code for this self-test is given in format:

• 0xyy, 0xzz, MeasResult1, MeasResult2, …

,where 0xyy, 0xzz part is the main part of the error code: 0xyyzz

Error

code

Bit mask Reason Actions

0x0001 ---------------1 GSM900 Tx power is under

threshold.

0x0002 --------------1- GSM1800 Tx power is under

threshold.

0x0004 -------------1-- GSM1900 Tx power is under

threshold.

Check following steps: 3.1 “

GSM

transmitter power levels and transmit

frequency ok?”

Please, refer to chapter 2.11 “

Error Code Interpretation Examples”, if more information about

error code interpretation is needed.

2.9 Supply test for Hinku and Vinku (ST_CDSP_RF_SUPPLY_TEST)

This self test tests supply voltage connections of RF ASICs Vinku (N7501) and Hinku (N7500).

The signals supported to be measured are:

- Reference voltage supply to each ASIC

- Regulator connections of each ASICs

- Supply voltage routings to each functional block of each ASIC.

Error code for this self-test is given in format:

• 0xyy, 0xyy, 0xzz, 0xzz, MeasResult1, MeasResult2, …

,where 0xyy, 0xyy part is the main part of the error code for Vinku TX ASIC: 0xyyyy

and 0xzz, 0xzz is the main part of the error code for Hinku TX ASIC: 0xzzzz