Tx I/Q Tuning - Nokia RM-94 Service Software And Tuning Instructions

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Adjust all power coefficients and the base level according to the target values.

Check if all levels match the target values, correct if necessary and then press < Save & Con-

tinue >.

Proceed with the 1900 MHz band.

TX I/Q tuning

This tuning must be performed in all three bands in GMSK mode and in EDGE mode.

The tuning is carried out exactly the same way in each band and is therefore described only

once.

It is strongly recommended to use TXP as external trigger for all TX tunings. External triggering

gives the following advantages:

• trigger for spectrum analyzer (gated sweep)

• trigger for oscilloscope

• trigger for power meter (avoid exchanging of attenuator and getting better accu-

racy)

Note: During Tx I/Q Tuning in GSM 900 band, an additional calibration value for the battery volt-

age A/D converter is taken. Therefore, it is important to set the operating voltage to 3.6V for this

alignment (and use highest PL).

Ensure that I/Q tuning in GSM 900 band is executed as last I/Q-tuning (every I/Q-tuning over-

writes the calibration for the battery voltage).

The VBAT value is detected and saved to PM.

3 - Service Software and Tuning Instructions

COMPANY CONFIDENTIAL

RM-94

Issue 1 04/2005

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