User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 27
Original 11/97
Tuning Steps of Radio Unit
The Service software program places the phone into the Locals mode, in
which the phone can be outwardly controlled via the M2BUS interface.
The tuning values of the phone reside on the EEPROM. Before tuning,
these values are read by the Service software and the user can change
these values with tuning functions.
Note: During tuning, keep the following in mind:
– 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!
Accuracy of the Equipment During Measurement
– Power supply 1; nominal voltage 12 ±0.5 V current cap. min. 1.5 A for
service box (JBS–7).
– Power supply 2 ;nominal voltage 6.0 ±0.1 V, current cap. min. 1.5 A.
– Modulation analyzer power level resolution 0.1 dB, accuracy ±0.5 dB.
Frequency counter accuracy 0.1 ppm 〈±80 Hz).
– RF generator; frequency res. 10 Hz amplitude res. 0.1 dB frequency
stab. ±0.25 ppm.
– Spectrum analyzer; dynamic range 70 dB, accuracy ±1 dB (For power
level measurement accuracy ±0.5 dB).