A Agilent 432A Power Meters & 478A Sensors: Additional Information; Agilent 432A Power Meters: Additional Information - Agilent Technologies E4416A Service Manual

A Agilent 432A Power Meters & 478A Sensors: Additional Information

Agilent 432A Power Meters: Additional Information

The internal bridge resistance of the Agilent 432A can be set to either 200 Ω or
100 Ω . It is important that this value is measured accurately (rounded to the
nearest 0.01 Ω) and recorded for use in the following tests:
• Power Reference Level Test.
• Output Standing Wave Ratio (SWR) Test.
Before attempting to measure the internal bridge resistance of the Agilent
432A, verify that no power is applied to the unit. Connect a DVM (set to
measure resistance) between the VRF connector on the rear panel of the
Agilent 432A and pin 1 on the thermistor mount end of the sensor cable.The
Agilent 432A front panel MOUNT RESISTANCE switch determines which
bridge resistance is selected.
For reference only, typical bridge resistance values are as follows:
R
•
200
R
•
100
Using incorrect resistance values in these calculations will introduce significant errors.
N O TE
A-128
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
≡ 200.05 Ω
≡ 100.25 Ω
E4416A/E4417A Power Meters Service Guide