4-42 Keysight N5244A/45A Service Guide
Troubleshooting
Measurement System Troubleshooting
4-
— A29, A30, A31, or A32 reference coupler
— A38, A39, A40, or A41 source step attenuator
— A42, A43, A44, or A45 bias tee
— A33, A34, A35, and A36 test port coupler
Equipment Used for These Tests
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
11, S22, S33, or S44,
measurement for Port 1, 2,
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 200 and 400
—
Port 1; W19 of A29
—
Port 2; W31 of A32
—
Port 3; W23 of A30
—
Port 4; W27 of A31
—
Options 219, 224, 419, and 423
—
Port 1; W81 of A29
—
Port 2; W93 of A32
—
Port 3; W85 of A30
—
Port 4; W89 of A31
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
“Checking the A50, A51, A52, and A53
Mechanical Switches” on page 4-43
Equipment Type
Model or
Part Number
Alternate Model or Part
Number
Spectrum analyzer
8565E
856xE
a
. Must be capable of measuring a signal at 7.61 MHz
(analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz.
Содержание PNA-X N5244A
Страница 10: ...8 Keysight N5244A 45A Service Guide Contents ...
Страница 90: ...3 62 Keysight N5244A 45A Service Guide Tests and Adjustments Adjustments 3 ...
Страница 146: ...4 56 Keysight N5244A 45A Service Guide Troubleshooting Instrument Block Diagrams Sheet 4 4 ...
Страница 155: ...Keysight N5244A 45A Service Guide 5 9 Theory of Operation Synthesized Source Group Operation Figure 5 3 Source Group ...
Страница 174: ...5 28 Keysight N5244A 45A Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 6 4 Port Receiver Group ...
Страница 175: ...Keysight N5244A 45A Service Guide 5 29 Theory of Operation Receiver Group Operation Figure 5 7 2 Port Receiver Group ...
Страница 188: ...5 42 Keysight N5244A 45A Service Guide Theory of Operation Noise Measurement Group Operation Option 029 5 ...
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