User Guide

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Troubleshooting - RF Nokia Customer Care
Page 54 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
• 60kHz offset -91dBc
• 90kHz offset -91dBc
Figure 46: Cell UHF LO channel 384 typical spectrum
Following ar possible causes for an incorrect UHF frequency:
RX VHF LO
The RX VHF LO operates at a fixed frequency of 256.2MHz. It is the second LO for down-
conversion to I and Q for baseband processing. Use the following guidelines when
troubleshooting:
• Monitor the probing point at C702 for the Batman LO. A locked and stable
256.2MHz with an amplitude of ~ –60dBm should be observed on the spectrum
analyzer (~ -2 dBm at C705 if using a high impedance probe).
• Monitor the control voltage at C715. The control voltage in a locked state should
be between 1.2 and 1.7 VDV for the proper operation of the Batman LO.