User Guide

RH-37
6(b) - RF Troubleshooting Instructions Nokia Customer Care
Page 6 Nokia Corporation Issue 1 07/04
Test conditions
Rx tuning of the 26 MHz reference oscillator (VCTCXO) is temperature sensitive
because of the estimations of <AFC_value> and <AFC_slope>. According to the Produc-
tion Test Specification DCS02294-EN-0.5, the ambient temperature has to be within a
temperature range of 22°C to 28°C.
Most RF semiconductors are static discharge sensitive. ESD protection must be taken
into account during repair (ground straps and ESD soldering irons).
The RF ASIC Helgo is moisture sensitive. Therefore, the ASIC must be pre-baked prior
to soldering.