Tx Power - Nokia NSW-5 Series Service Manual

PAMS Technical Documentation
Scentre frequency to 830.700 Mhz
Sspan 80 kHz.
SRef LVL 20 dB
SRWB and VBW 1 kHz
Ssweep time 0.3 s
– Use "TX I DC Offset" and "TX I DC Offset" option to adjust CFR
-5.9kHz to minimum.
The amplitude difference between CFR and CFR –5.9 kHz should be
>40 dB.
– Use the "Phase Offset" option to adjust CFR –14.2 kHz to minimum.
The amplitude difference between CFR and CFR –5.9 kHz should be
>40 dB. .
– Once TX I, TX Q and phase shift are aligned, press SAVE.
5. TX Power... LOW BAND / HIGH BAND
NOTE: Use Service Battery connected to 1.5A 8.5V power supply or use
phone's own battery.
This tuning is to adjust the output power level values of the radio unit ac-
cording to the system specification.
This adjustment loads the power levels of the phone transmitter into the
EEPROM. When doing this, a pulse power meter or spectrum analyzer
must be used.
Tuning targets are listed in the following pages
The <Settings> shows spectrum analyzer settings.
Power levels programming:
– Set power supply voltage, see the Note above
– Connect pulse power meter or spectrum analyzer. Use attenuator if
necessary.
– Settings for spectrum analyzer in power level tuning:
Sspan 80 Hz.
SRef LVL 30 dB
SRef LVL offset and –>Attenuation to EXT Antenna con-
nector.
SRWB and VBW 300 kHz
Ssweep time 50 ms
STRIG: SWEEP CONT, VIDEO –10 dBm
Smarker in the middle of the slot.
SCheck that the spectrum analyzer frequency is correct
Issue 1 10/00
Tuning and Flashing Instructions
E Nokia Mobile
Phones Ltd.
NSW-5
Page 11