Agilent Technologies N5242A Service Manual page 105

PNA Series Microwave Network Analyzers
N5242A
4. Set the network analyzer for a 2 GHz CW frequency and observe the spectrum analyzer
measurement.
• The spectrum analyzer should measure a signal at 2 GHz (plus the 7.61 MHz offset).
5. If the signal is not present and the signal is present from
LO Synthesizer Output,"
the A21 HMA26.5" on page
6. If the signal is present, reconnect cable W42, and then:
• for 2-port models, continue checking with
page 4-37.
• for 4-port models, continue checking with
Checking the A22 Splitter Output
1. Refer to the block diagram at the end of this chapter and to
Standard 4-Port Configuration, Option 400" on page
W43 and W44, at the A22 splitter.
2. Disconnect W43 and W44, one at a time, from the A22 splitter.
3. Connect the spectrum analyzer to the open connector.
4. Set the network analyzer for an S
observe the spectrum analyzer measurement.
• The spectrum analyzer should measure a signal at 2 GHz (plus the 7.61 MHz offset).
5. If the signal is not present and the signal is present from
Output," replace the A22 splitter. Refer to
on page 7-32.
6. If the signal is present, reconnect cables W43 and W44, and then continue with
"Checking the Receiver Group" on page
Checking the A4 and A13 Source Synthesizer Outputs
1. Refer to the block diagram at the end of this chapter and to
Options" on page
synthesizer board or W2 at the A13 source 2 synthesizer board.
2. Disconnect W1 or W2 from J1207.
3. Connect the spectrum analyzer to J1207.
4. Set the network analyzer for a 500 MHz CW frequency and observe the spectrum
analyzer measurement.
• The spectrum analyzer should measure a signal at 507.61 MHz.
5. If the signal is not present and the 5 MHz reference signal is present from
the A10 50 MHz Reference Outputs,"
"Removing and Replacing the A4–A13 Boards" on page
6. If the signal is present, reconnect cables W1 and W2, and then continue with
the A5 and A8 Source
Service Guide N5242-90001
replace the A21 HMA 26.5. Refer to
7-30.
measurement at a CW frequency of 2 GHz and
33
6-16. Locate either the flexible cable W1 at the A4 source 1
replace the faulty synthesizer board. Refer to
Outputs".
Measurement System Troubleshooting
"Checking the A11 13.5 GHz
"Checking the Receiver Group" on
"Checking the A22 Splitter
"Bottom RF Cables,
6-42. Locate the semi-rigid cables
"Checking the A21 HMA26.5
"Removing and Replacing the A22 Splitter"
4-37.
"Top Cables, All Cables—All
7-14.
Troubleshooting
"Removing and Replacing
Output".
"Checking
"Checking
4-31