A16 Reference Assembly Troubleshooting - Keysight N8973B Service Manual

L.O. Synthesizer/Reference Troubleshooting

A16 Reference Assembly Troubleshooting

A16 Reference Assembly Troubleshooting

If the A16 Reference Assembly is suspect, verify the reference signals, local
oscillator output frequencies, and power levels as per
functioning spectrum analyzer.
The board layout in
output connectors and LEDs on the A16 Reference Assembly.
If these outputs measure correctly, the A16 Reference Assembly is functioning
correctly. If not, the Reference Assembly is the most probable cause provided
the power supply is operating correctly. Refer to
Troubleshooting" on page 315
Figure 8-8 A16 Reference Assembly
Figure 8-9 A16 Reference LEDs
282
Figure 8-8 and Figure 8-9
if the power supplies are suspect.
Keysight NFA Series Noise Figure Analyzers Service Guide
Table 8-2 using a
below identifies the input and
"A7 Midplane Assembly