User Guide

PAMS
Technical Documentation
NSB–1/3
Tuning Instructions
Page 14
Original 06/98
3. 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.
– Adjust spectrum analyzer centre frequency to 1880 MHz, Span 0 Hz,
Res BW 3 MHz, Video BW 3MHz, Sweep time <20ms and Marker
peak.
Power levels programming:
– Set power supply voltage 8.4 V to service battery (or 3.6 V to jig).
– Connect pulse power meter or spectrum analyzer (with an attenuator if
needed) to the external antenna connector of the phone.
– Select
Tuning –> TX Power...
– Select tuning values from the PC’s memory, the phone’s EEPROM or
factory default values.
– Check that the channel is 661.
If it doesn’t, change it in RF Controls window.
– Increase base value by:
0.005 for SW version 3.X
0.012 for SW version 4.00 or later
– Adjust the power level (levels 0, 7, 8 and 15) by clicking the
+ and – buttons or and keys, and change levels with ↑
and ↓ keys.
Power
level
Tuning P
OUT
/dBm
(CH 661)
Note: attenuation!!
0 29,5
7 16.0
8 14.0
15 0
– Press Calculate button to calculate all other levels.
– Once all TX levels are correct, press
SAVE button.