Nokia 9000i Service Manual page 239

After Sales
Technical Documentation
Tuning Procedure for PCN units
Carry out this procedure in the order as shown.
1. RSSI Reference Signal Level Storage
Reference value for the received signal strength meter are program tuned.
RSSI reference signal level programming:
– Start the service software and go to "Main" menu.
– Select "Phone mode" and select local mode with <Enter> key.
– Select "Testing and Adjustments" menu and press <Enter>.
– Select "Adjustments" menu and press <Enter>.
– Connect RF generator to antenna connector at 1842.8677 MHz
(Channel 700).
– Adjust signal generator level to –75 dBm + cable attenuation
(
see note below
– Select "RSSI Calibration" and press <Enter>.
– Adjust signal generator level to –45 dBm + cable attenuation.
– Press <Enter>.
– DAC values should be in first row (0 dB) 450 – 700 and last
row (57 dB) 750 – 1000.
– Press <Esc> key.
– Store the value to the EEPROM with <Y> key.
Note: Always take the target tuning value from the actual monitor screen as the value
can vary according to which CMT software version is used.
2. AFC Diagram Storage
This tuning is used to calibrate the automatic frequency control range.
AFC tuning:
– Set RF generator frequency 1842.8677 MHz at level –45 dBm + RF
cable attenuation.
– Check that " Cont mode channel" is 700
– Select adjustments menu option "AFC Diagram" and press <Enter>
– The measurement result should be;
– Press <Esc> key and store with <Y> key.
Amendment 1 04/97
)
Low between –30 kHz and –10 kHz, typically –20 kHz
Middle 3.0 kHz
High between 10 kHz and 30 kHz, typically +20 kHz
RAE/RAK–1N
Service Software
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