Keysight Technologies E4417A Service Manual page 58

Steps 1 to 7 of this procedure require pre-requisite knowledge of some Keysight
NOTE
432A and 478A parameters. Refer to
1 Record the input VRC magnitude of the thermistor mount at 50 MHz with the
2 Record the input VRC magnitude of the thermistor mount at 50 MHz with the
3 Set the Keysight 432A mount resistance switch to 200 Ω.
4 Set the DVM to measure resistance:
5 Round off the DVM reading to two decimal places. Record this value as the
6 Set the Keysight 432A mount resistance switch to 100 Ω.
7 Round off the DVM reading to two decimal places. Record this value as the
8 Set the Keysight 432A mount resistance switch to 200 Ω.
9 Connect the equipment as shown in
Ensure that the Keysight 432A and the power meter under test have been
NOTE
switched on for at least 30 minutes before performing the following steps.
Keysight E4416A/E4417A Power Meters Service Guide
Keysight 432A power meter set to 200 Ω:
– |R1| ___________
Keysight 432A power meter set to 100 Ω:
– |R2| ___________
Connect the DVM between the VRF connector on the rear panel of theKeysight
432A and pin 1 on the thermistor mount end of the sensor cable. Verify that no
power is applied to the Keysight 432A.
first internal bridge resistance (R
– R ___________ Ω
1
second internal bridge resistance (R
– R ___________ Ω
2
leads are isolated from chassis ground.
Appendix A for further information.
) of the Keysight 432A:
1
) of the Keysight 432A:
2
Figure 2-10 ensuring that the DVM input
Performance Tests 2
63