Nokia Mobile Phones NSE-5 Series, Service Manual, Page: 142 / 327

PAMS
Technical Documentation
NSE–5
Service Software Instructions
Page 42
Issue 1 07/99
During tuning, proceed as follows:
-
Take care not to damage sensitive measuring instruments with exces-
sive RF power.
-
Carry out all tuning steps in the shortest possible time to avoid exces-
sive heating of RF units.
-
Perform all tuning steps in the order presented.
-
Never try to mask a fault by tuning it out
!
It is recommended that all the power–levels are separately aligned,
although there is a possibility to align only three and calculate the rest.
This is due to the fact that the calculation is not accurate enough.
Especially for the lowest power–levels in the PCN band, where the target
power–levels are NSE-5 specific.
Note Base level must be adjusted manually because the calculation most often fails.
Dialog mode: modal
TX Power Tuning dialog has following items:
Power Level & Coefficients list box (ALT+L):
The power is presented in GSM or PCN values. The base power is se-
lected automatically when the dialog is opened. The test value is not
saved to the EEPROM. The test value can be changed during tuning as
other power coefficients and the program remembers its value when tun-
ing function is activated later again.
Only three power coefficients (highest, third smallest and lowest) are
needed to tune (left justified Coefficients) and the rest of them are calcu-
lated.
The tuning position is highlighted and can be tuned with +/– keys or left/
right cursor keys.
Calculate button (ALT+A):
The calculation is activated with this button. The power coefficients which
are calculated from the tuned coefficients are displayed on the different
columns than the others. All values can be tuned if needed.
Base level calculation check box:
If this box is checked the base level is calculated.
+/– buttons (+/– and left/right cursor keys):
+ and – buttons will cause power changing by 0.25dB steps. When these
keys are used the coefficient value is updated on the tuning window.
Save button (ENTER):
Dialog is closed and tuned values are
saved to phone.