3-46 Keysight N5244A/45A Service Guide
Tests and Adjustments
Performance Tests
3-
7.
The power linearity error at each point is calculated as Pe = (Pmr – Pmd) –
(Par – Pad).
8.
A2 is incremented 10 dB, A1 is set to 0 dB, and the signal generator’s
source power is adjusted until the receiver power level is exactly the same
as it was before the attenuators were switched.
9.
New power meter and analyzer receiver reference readings are recorded.
The process is repeated until the total attenuation reaches the minimum
test level.
10.
The process is reset to the reference levels from step 4, and it is run in
reverse until the total attenuation reaches the maximum test level.
11.
This test is repeated for the 15 and 30 dB noise gain settings.
If the Analyzer Fails this Test:
A failure of this test indicates a fault in the noise receiver chain. This can
indicate a faulty assembly or a loose cable.
— Check for proper torquing of all semi-rigid cables in the receiver chain, and
then repeat this test.
— If the analyzer still fails this test, replace the A7 Noise Receiver board and
“Removing and Replacing the A4–A17 Boards (For
analyzers with serial numbers prefixed MY/SG/US5150 and below)” on
and
“Removing and Replacing the A4–A17 Boards (For
analyzers with serial numbers prefixed MY/SG/US5201 and above)” on
.
Noise Receiver Compression Test
Function of the Test: To measure the PNA-X noise receiver compression at the
receiver’s specified maximum input power level.
Specification Tested: Test Port Input: Option 029 – Noise Receiver Input Range
Equipment Used:
— Power meter
— Power sensors
— Test cables
— 10 dB attenuator
Description of the Test:
The noise receiver compression level varies from -16 dBm for the high band of
the low gain stage down to -52 dBm for the low band of the high gain stage.
This range is too wide to get an accurate source power calibration for each
gain stage using a standard power sensor. So the source power is calibrated at
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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