Checking The Receiver Group - Agilent Technologies N5230A Service Manual

PNA Series Microwave Network Analyzers
N5230A

Checking the Receiver Group

Equipment Used for These Tests
Equipment Type
Spectrum analyzer
a. Must be capable of measuring signals at 8.333 MHz and 41.667 MHz.
Getting Ready to Test
Before checking the assemblies, you must open the analyzer.
CAUTION Use an antistatic work surface and wrist strap to reduce the chance of
electrostatic discharge.
1. Turn off the analyzer power.
2. Unplug the power to the analyzer and disconnect all rear panel connections.
3. Remove the covers from the analyzer. Refer to
4. With the covers off, plug in the analyzer and turn on the power.
5. For Port 1 measurements, set the network analyzer for an S
frequency of 1 GHz. Make sure the spur avoidance function is OFF.
For Port 2 measurements, set the network analyzer for an S
frequency of 1 GHz. Make sure the spur avoidance function is OFF.
Checking the A20 Mixer Brick Receiver Outputs
Perform this procedure if a problem appears to be in one of the receiver channels.
1. Refer to the block diagram at the end of this chapter and to
Passive Configuration (Options F06 and F13)" on page
W21, W22, W23 and W24 at each receiver channel IF output, A, R1, R2, and B
respectively.
2. Disconnect the flexible cable at the suspect channel.
3. Connect the spectrum analyzer to the suspect channel connector.
4. The measured signal on the spectrum analyzer should be at 7.66 MHz.
• If the signal is present, replace the A5 SPAM board. Refer to
Replacing the A5 through A10 Boards" on page
5. If the signal is not present, replace the A20 mixer brick. Refer to
Replacing the A20 Mixer Brick (QuintBrick)" on page
Service Guide N5230-90014
Model or Alternate Model
Part Number or Part Number
8565E
856xE
"Removing the Covers" on page
7-16.
7-26.
Measurement System Troubleshooting
a
measurement with a CW
11
measurement with a CW
22
"Bottom Assemblies,
6-14. Locate the flexible cables
"Removing and
"Removing and
Troubleshooting
7-6.
4-45