Keysight N5244A/45A Service Guide 3-55
Tests and Adjustments
Adjustments
Noise Figure Adjustment (Available with Option H29 Installed)
The noise figure adjustment should be performed after replacing any
component in the noise figure circuitry, or if the PNA fails the noise IF gain
portion of the Op check. The noise figure adjustment consists of the following
three sections:
— Noise Compression Adjustment: sets the warning level for overpower
conditions at the noise receiver.
— IF Gain Cal Adjustment: sets IF Gain flatness for the noise receiver.
— Noise Correction Adjustment: overwrites the factory noise receiver
calibration.
Equipment Used for the Noise Figure Adjustment
Procedure
1.
Press UTILITY
, then
, then
, then click
Noise Adjustment.
2.
On the PNA Noise Adjustment dialog box (see
Figure 3-19
), leave all three
adjustments selected in the “Select Adjustments” box. Verify the directory
path displayed in the “Select ENR Data File” box contains the ENR file for
the noise source you are using. If not the correct ENR file, click Browse to
navigate to the correct file. If the proper file does not already exist, click
Create New to enter data for the noise source you are using. The PNA will
automatically remember and use the last file selected. These files should
normally reside in the
C:\Program Files\Keysight\Network
Analyzer\Noise
directory, but can also exist elsewhere.
Option H29 (not available for purchase after May 1, 2013) enables noise
figure measurements up to 26.5 GHz.
The equipment listed below is for use with 3.5 mm components. Other
equipment may be required for components with different connector sizes.
Equipment Type
Model or
Part Number
Noise source
346A/B/C
Adapter, 3.5 mm, -f- to -f-
83059B
Test Port Adapters (quantity 2), 2.4 mm -f- to 3.5 mm -m-
11901D
RF Cable, 3.5 mm -f- to -f-
85131C
ECal module, 3.5 mm, -m- to -f-
N4691B-M0F
System
Service
Adjustments
Содержание PNA-X N5244A
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Страница 90: ...3 62 Keysight N5244A 45A Service Guide Tests and Adjustments Adjustments 3 ...
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Страница 155: ...Keysight N5244A 45A Service Guide 5 9 Theory of Operation Synthesized Source Group Operation Figure 5 3 Source Group ...
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