282 Keysight NFA Series Noise Figure Analyzers Service Guide
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 Table 8-2 using a
functioning spectrum analyzer.
The board layout in Figure 8-8 and Figure 8-9 below identifies the input and
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 “A7 Midplane Assembly
Troubleshooting” on page 315 if the power supplies are suspect.
Figure 8-8 A16 Reference Assembly
Figure 8-9 A16 Reference LEDs
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