Keysight Technologies N5244/5B Service Manual page 144

Troubleshooting
Measurement System Troubleshooting
Equipment Used for These Tests
Equipment Type
Spectrum analyzer
a.
Refer to
(analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz.
To determine which assembly is defective, check the signal at each available
measurement point in the signal path from the output of the source board to
the output port.
Set the network analyzer for an S
3, or 4 respectively, with a CW frequency of 800 MHz.
Perform the following checks in the order presented.
Checking the A29, A30, A31, and A32 Reference Couplers
1. Locate the appropriate semirigid cable at the output of the reference
coupler to be checked:
— Options 201 and 401
— Options 219, 224, 419, and 423
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the
reference coupler.
3. Connect the spectrum analyzer to the open reference coupler connector.
Set the spectrum analyzer to measure a signal at 800 MHz.
4. If the 800 MHz signal is not present and the analyzer has mechanical
switches, continue testing at
Mechanical Switches" on page
4-50
the NOTE notice on page 4-31. Must be capable of measuring a signal at 7.61 MHz
— Port 1; W19 of A29
— Port 2; W31 of A32
— Port 3; W23 of A30
— Port 4; W27 of A31
— Port 1; W81 of A29
— Port 2; W93 of A32
— Port 3; W85 of A30
— Port 4; W89 of A31
Model or
Part Number
8565E
measurement for Port 1, 2,
11, S22, S33, or S44,
"Checking the A50, A51, A52, and A53
4-51.
Keysight N5244B/45B Service Guide
Alternate Model or Part
Number
a
856xE