Keysight Technologies N9030B Service Manual page 42

Overview
Service Equipment You Will Need
d. Wenzel Associates Inc
2215 Kramer Ln
Austin, Texas 78758
(512) 835-2038
FAX (512) 719-4086
e. The 8482A power sensor uses cal factors to compensate the power sensor for frequency
response errors. Cal factors are stated in percentages. The 8482A factory cal factor uncertainty
ranges from 2.2% to 3.1%. The cal factor uncertainty can be reduced to < 2.0% by using metrol-
ogy grade calibration techniques. The power sensor cal factor uncertainty becomes one compo-
nent of the Verification Test uncertainty analysis. Lower cal factor uncertainties will translate to
wider test margins.
f. When ordering a new STD or CFT Power Sensor from Keysight to be used with the N7800A series
applications, order with Option 1A7. The 1A7 option provides an ISO17025 calibration and
includes calibration data. When re-calibrating your STD or CFT Power Sensor for use with the
N7800A series applications, we recommend the Keysight ISO17025 calibration.
g. When ordering a new STD or CFT Power Sensor from Keysight to be used with the N7800A series
applications, order with Option 1A7. The 1A7 option provides an ISO17025 calibration and
includes calibration data. When re-calibrating your STD or CFT Power Sensor for use with the
N7800A series applications, we recommend the Keysight ISO17025 calibration.
h. The step attenuators should be permanently joined via the 11716A Interconnect Kit as shown in
the diagram.
i. 8491A Option H33 is a fixed attenuator which has been characterized to have a VSWR ≤ 1.05:1 at
50 MHz. A VSWR of 1.05:1 is critical to test Input Attenuator Switching Uncertainty, Display Scale
Fidelity, and Absolute Amplitude Accuracy performance tests. Any 8491A/B attenuator can be
mapped into this device if the VSWR at 50 MHz has been characterized to be ≤ 1.05:1. When
mapping the attenuator, to indicate that is meets the required specification, the Option H33
checkbox will need to be checked in the configure test station Administration screen.
Step Attenuator Loss Characterization
The step attenuator combination should have each attenuator setting
characterized by a metrology lab at 50 MHz. This characterization can be
ordered through Keysight Technologies as an Option H50 Calibration.
The following tables show which sections of the 10 dB and 1 dB step
attenuators are utilized for each attenuator setting. The tables also list the
Recommended Uncertainty for each attenuator setting. A larger number will
result in larger overall test uncertainties which could affect the test pass/fail
rate.
42 N9030B PXA Signal Analyzer Service Guide