Noise State Calibration Coefficients; Noise Jitter Test - Keysight Technologies N5244/5B Service Manual

Tests and Adjustments
Performance Tests
— 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 A9 noise receiver board and
repeat this test. Refer to
analyzers with serial numbers prefixed MY/SG/US5150 and below)" on
page 7-20
analyzers with serial numbers prefixed MY/SG/US5201 and above)" on
page

Noise State Calibration Coefficients

IMPORTANT! For the most current information on the Table 7-2
"Verification, Performance, and Other Tests and Procedures" column's
content, refer to
https://cal.software.keysight.com/PNA/Help/N7840AWebHelp.htm.

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:
3-44
"Removing and Replacing the A4–A17 Boards (For
and "Removing and Replacing the A4–A17 Boards (For
7-24.
Keysight N5244B/45B Service Guide