Welcome to
Azur Electronics
Different display for each band
February 2015
The switching between bands is via micro-switches operated by the band switch on the HP 8620C which also changes the scale selected . This goes via some logic circuitry to 4 pins on the internal connector to the 86290B.
Initial testing with a crystal detector, then a power meter and frequency counter and all looks ok. Performance tests to be done.
March 2017
Have finally obtained the complete Operating and Service Manual, thanks to Dave at Artek Manuals, all 288 pages!
August 2019
Tested with 8620C & 8410C ok.
All the 8407A & 8410C based Network Analyser System, including the 86290B, has now been Sold.