Tx Iq Tuning - Nokia RH-37 Series Service Software And Tuning Instructions

RH-37
Service Sofftware and Tuning Instructions
Adjust DAC Values for all power levels according to the target values.
Check if all levels match the target values, correct if necessary and then press < Save &
Continue >.
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 trig-
gering 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 voltage
A/D converter is taken. Therefore, it is important to set the operating voltage to 3.6V for this align-
ment (and use highest PL).
Ensure that I/Q tuning in GSM 900 band is executed as last I/Q-tuning (every I/Q-tuning overwrites
the calibration for the battery voltage).
The VBAT value is detected and saved to PM.
PC/Phone operation:
Set operating mode to Local Mode.
Set supply voltage to 3.6V.
Select
Wait until the TX IQ Tuning window pops up and press <Start>.
On the popped up window, press ok
Open a second window following the instructions below:
Select
Page 62
Tuning
Testing
Nokia Corporation

TX IQ Tuning

Nokia Custome Care
T
I
Issue 1 07/04