3-44 Keysight N5244A/45A Service Guide
Tests and Adjustments
Performance Tests
3-
— 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 Jitter Test
Function of the Test: To measure the stability of a signal in the internal noise
receiver system.
Specification Tested: Test Port Input: Option 029 – Noise Jitter
Equipment Used: Load standard
Description of the Test:
Noise jitter is a calculation of the standard deviation of a 201 point CW
measurement using the noise receiver. In a healthy analyzer, this measurement
is only affected by the sampling error of the analog to digital converter on the
noise receiver board.
1.
The analyzer is Preset.
2.
The analyzer is set to make a noise power density measurement with the
noise gain set to 0 dB and the noise bandwidth set to 4 MHz. The analyzer
is set up for a 201 point CW transmission measurement using the noise
receiver.
3.
A load is connected to Port 2.
4.
At each of hundreds of points across the full frequency range of the noise
receiver, the noise jitter of the sweep is calculated from:
5.
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
Содержание PNA-X N5244A
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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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