Nokia 9000i Service Manual page 241

After Sales
Technical Documentation
– Select option "TX I and Q d.c. offset" and press <Enter>.
– Adjust the level of signal CHF to minimum by varying D/A converter
value with <+> and <–> keys.
– The amplitude difference between CHF–67.7 kHz and CHF should be
>30 dB.
– When value is OK press <Esc>.
– Select option "Tune Amplitude Difference" and press <Enter>.
– Adjust the level of signal CHF+67.7 kHz to minimum by varying D/A
converter value with <+> and <–> keys.
– When value is OK press <Esc>.
– Select option "Tune Phase Difference" and press <Enter>.
– Adjust the level of signal CHF+67.7 kHz to minimum by varying D/A
converter value with <+> and <–> keys.
– The amplitude difference between CHF+67.7 kHz and CHF–67 kHz
should be >35 dB.
– When value is OK press <Esc>.
– Press <Esc> key and store new values with <Y> key.
4. Tuning of Transmitter Power Levels
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.
Note: The cable loss of HCR–1 is about 2.4 dB
Power levels programming:
– Set power supply voltage to 7.2 V.
– Connect pulse power meter or spectrum analyzer to antenna
connector.
– Check that channel is 700.
– Select adjustments menu option "TX Power Tuning" and press
<Enter>.
– Press <Y>.
– Adjust the power level (levels Base, 0, 8 and 10) with <+> and <–>
keys and change levels with <Up> and <Down> keys.
Amendment 1 04/97
RAE/RAK–1N
Service Software
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