Keysight N5244A/45A Service Guide 3-41
Tests and Adjustments
Performance Tests
Within the dynamic accuracy test set, the source signal is routed through
a small amplifier and a 10 dB step attenuator, A1, to a power splitter. One
side of the power splitter is connected to the power sensor port. The
signal from the other side of the splitter is routed through a 110 dB step
attenuator, A2, to the receiver port.
3.
With the amplifier active and A1, set to 0 dB, the analyzer source power is
adjusted to achieve exactly 0.0 dBm at the power sensor. This is the power
meter reference reading, Pmr.
4.
A2 is set to 20 dB and the analyzer’s receiver power level is measured. This
is the analyzer reference reading, Par.
5.
A1 is changed to 5 dB and 10 dB. At each point, delta power levels are
read on the power meter, Pmd, and the analyzer, Pad.
6.
The power linearity error at each point is calculated as Pe = (Pmr – Pmd) –
(Par – Pad).
7.
A2 is set to 30 dB, A1 is set to 0 dB, and the analyzer’s source power is
adjusted until the receiver power level is exactly the same as it was before
the attenuators were switched.
8.
New power meter and analyzer receiver reference readings are recorded.
The process is repeated until the total attenuation reaches 120 dB.
9.
The process is reset to the 20 dB reference level and it is run in reverse
until the total attenuation reaches 0 dB.
If the Analyzer Fails this Test:
— If the analyzer fails this test, rerun the test.
— If the analyzer fails this test repeatedly, replace the A23 mixer brick for a
Port 1 or Port 2 failure or the A24 mixer brick for a Port 3 or Port 4 failure,
then repeat this test. Refer to
Chapter 7, “Removing and Replacing the A27
— If the analyzer still fails this test, replace the A12 SPAM board and repeat
this test. Refer to
“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
.
Dynamic Accuracy Test – Version 2
This description applies to all N522xA, N5231A/32A/34A/35A/39A, and
N5247A instruments. It also applies to N5241A/42A/44A/45A instruments with
serial numbers greater than xx5240xxxx. It also applies to
N5241A/42A/44A/45A instruments with serial numbers less than xx5240xxxx.
For all other instruments, see test version 1.
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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Страница 505: ...Installation Note Xxxxx xxxxx 3 ...