A Keysight 432A Power Meters & 478A Sensors: Additional Information
140 Keysight E4416A/E4417A Power Meters Service Guide
Keysight 432A Power Meters: Additional Information
The internal bridge resistance of the Keysight 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 Keysight 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 Keysight 432A
and pin 1 on the thermistor mount end of the sensor cable.The Keysight 432A
front panel MOUNT RESISTANCE switch determines which bridge resistance is
selected.
For reference only, typical bridge resistance values are as follows:
–
–
Using incorrect resistance values in these calculations will introduce significant
errors.
To Next Page
Loading...
Need help?
General
