User Guide

CCS Technical Documentation Troubleshooting - RF
RH-48
Issue 1 11/2003 © 2003 Nokia Corporation Confidential Page 33
6 Type 10, 13, 12, and 8 in the fields in the PIN # column.
Figure 24: General I/O dialog box for VCTCXO tuning
7 Click the Get All button.
8 Change the value for Pin 8 in the Source column to GenIO Output.
9 Ensure that all of the pins have a value of H in the State column. (Click the L val-
ues to change them to H values.)
10 If using an HP4406 or a spectrum analyzer to measure the signal, set the center
frequency to 836.52MHz and the span to 2MHz. Establish a marker at
836.52MHz.
11 If using an HP8960 to measure the frequency accuracy, set the callbox state to
AMPS and set the channel to 384. Use the frequency accuracy measurement to
center VCTCXO.