Keysight Technologies N5247B Service Manual page 151

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
— 4-port models
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. Refer to
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
6. If the measured signal is not present, replace the A24 IF multiplexer board.
Refer to
page
Keysight N5247B Service Guide
— Receiver A; W69
— Receiver R1; W72
— Receiver R2; W73
— Receiver B; W70
— Receiver A; W69
— Receiver B; W70
— Receiver C; W72
— Receiver D; W73
— Receiver R; W71
the NOTE notice on page
"Removing and Replacing the A24 IF Multiplexer Board" on
7-34.
4-29. The measured signal on the
7-18.
4-55