User Guide

PAMS Technical Documentation Service Software
NSB-5
Issue 1 03/01 Nokia Mobile Phones Ltd. Page 37
During tuning, proceed as follows:
-Take care not to damage sensitive measuring instruments with excessive RF power.
-Carry out all tuning steps in the shortest possible time to avoid excessive 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 measured and verified separately, even
though it is possible to align four and calculate the rest. This is due to the fact that the
calculation may not be accurate enough, especially for the lowest power levels in the
PCS band, where the target power levels are NSB–5 specific.
Figure 16: Tuning - TX Power Tuning Dialog
Dialog mode: modal
The “TX Power Tuning” dialog box has the following items:
Power Level & Coefficients list box (ALT+L):
The power is presented in PCS Power Control Level values. The Base power is derived
automatically when the dialog is opened. The Test value is not saved to the EEPROM. The
Test value can be changed during tuning (the same as other power coefficients) and the
program remembers its value when tuning function is activated again later.
Only four power coefficients (0, 7, 8, 15) need to be tuned (left-justified Coefficients);
and the rest are calculated.
The tuning position is highlighted and can be adjusted using the +/- keys or the left/right