Publication 21555, Rev. E, September 2002
4-1
4
Calibration & Testing
4.1
Introduction
Information in this chapter is useful for periodic calibration and testing of the 58542 VXIbus Universal
Power Meter and its power sensors. These tests can also be used for incoming inspection testing when
the instrument is first received. If the 58542 power meter has not been previously used, please review
Section 2.3.
4.2
Equipment Required
The following equipment is required to complete the performance test procedures:
Description
Representative Model
Key Characteristics
CW Thermistor Power Meter
HP432A
V
RF
and V
COMP
available externally
Thermistor Mount
HP 478A-H75
≤
1.07 VSWR @ 50 MHz (30 dB return loss)
Digital Voltmeter (DVM)
Fluke 8842A
±
0.05% accuracy and 1
µ
V resolution
Directional Coupler, 10 dB
Mini Circuits ZFDC-10-1 10dB
≤
1.15 SWR @ 50 MHz
Step Attenuator, 0 to 90 dB in 10 dB
increments
Weinschel AC 118A-90-33
≤
1.15 SWR @ 50 MHz
±
0.1dB attenuation
RF Source (Signal Generator) (High Power)
Wavetek 2405 Option XP
+22 dBm @ 50 MHz
Low Pass Filter
Integrated Microwave 904 881
>30 dB attenuation @ 100 MHz
GPIB Controller for IBM PC
National PC2/2A
With driver software
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