Agilent Technologies 8590 Series Service Manual page 656

Analyzer Messages
Interpreting Analyzer Messages
TG SIGNAL NOT FOUND (U)
This error message applies to analyzers equipped with Option 010, 50 Ω
Output Tracking Generator, and Option 011, 75 Ω Output Tracking
Generator.
Description
.
During the
CAL TRK GEN
above the first division from bottom screen is not present. The primary
purpose of the error message is to indicate that the CAL cable is not
connected from the tracking generator RF OUT to the RF INPUT.
Related Assemblies
A7A1 tracking control, A24 FL1, A24A1 tripler, A24A2 tracking
converter, A24A3 amplifier detector, A24A4 output attenuator.
Troubleshooting Hints
• If a low signal response is present within the first division from
bottom screen, check the cable connection from the RF OUT to the
RF INPUT.
A cable with excessive loss can cause a low-level signal. Use the CAL
cable that is supplied with the instrument. Be sure to use the same
CAL cable when performing all the self-calibration routines.
Refer to Table 1-4
• If no signal response is present, check the output of the tracking
generator at the RF OUT connector. Refer to
Generator Block Diagram, in
TG UNLVL (U)(H)
This message can indicate the following: that the source power is set
higher or lower than the analyzer can provide, that the frequency span
extends beyond the specified frequency range of the tracking generator,
or that the calibration data for the tracking generator is incorrect. See
the 8590 E-Series and L-Series Spectrum Analyzers User's Guide for
more information.
Related Assemblies
8590L and 8591E spectrum analyzers only: A7A1 tracking generator
control assembly, A24 tracking generator control assembly.
Troubleshooting Hints
Perform the tracking generator control routine.
656
self-calibration routine, a signal response
for the part number of the CAL cable.
Chapter 9
Figure 9-5, Tracking
for more information.
Chapter 14