Keysight N5224B/25B Service Guide 4-55
Troubleshooting
Measurement System Troubleshooting
Checking the A24 IF Multiplexer Board
1.
Locate each of the flexible RF cables at the output receivers of the IF
multiplexer board:
—
2-port models
—
Receiver A; W69
—
Receiver R1; W72
—
Receiver R2; W73
—
Receiver B; W70
—
4-port models
—
Receiver A; W69
—
Receiver B; W70
—
Receiver C; W72
—
Receiver D; W73
—
Receiver R; W71
2.
Disconnect the appropriate flexible RF cable from the output receiver to be
tested on the A24 IF multiplexer board.
3.
Connect the spectrum analyzer to the open connector.
4.
. The measured signal on the spectrum
analyzer should be at 7.61 MHz (analyzers with DSP version 4.0), or 7.44
MHz (analyzers with DSP version 5.0), and 1 GHz.
5.
If the measured signal is present, replace the A16 SPAM board. Refer to
“Removing and Replacing the A4–A17 Boards” on page 7-19
.
6.
If the measured signal is not present, replace the A24 IF multiplexer board.
Refer to
“Removing and Replacing the A24 IF Multiplexer Board” on
.
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Страница 612: ...Appendix 4 Service Guide EEPROM Address Assignments and Location N5224 5A B PNA and N5244 5A B PNA X Instruments...
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