Part 2 of the Power Meter / Sensor Series. Peter uses the modified power meter to test and adjust the chopper balance and switching spikes in a second-hand sensor. This recovers the lost dynamic range of the sensor.
RF Powe Meter Series Episodes
1. Power Meter Modification - https://youtu.be/PMsH562xroo
2. Sensor Chopper adjustment - https://youtu.be/YiRBuvGd0qM
3a. Calibrator Build (design) - https://youtu.be/VLkvqzXmRDA
3b. Calibrator Build (build and fault finding) - https://youtu.be/BCZHe3YkCxk
4 - Meter Repair - https://youtu.be/_0U8M_3qo80
Service Manuals and Links
8484A - https://www.keysight.com/gb/en/assets/9018-05414/user-manuals/9018-05414.pdf
8480 Series - https://www.keysight.com/gb/en/assets/9018-04931/service-manuals/9018-04931.pdf
Operating and service - https://www.keysight.com/gb/en/assets/9018-05214/user-manuals/9018-05214.pdf
H01 Option - https://www.keysight.com/gb/en/assets/9018-05058/user-manuals/9018-05058.pdf
435a service http://ftb.ko4bb.com/getsimple/index.php?id=manuals&dir=HP_Agilent/HP_435_Power_Meter get the 70M version for schematics