AnsweredAssumed Answered

waveguide calibration errors

Question asked by myonezaki on May 14, 2013
Latest reply on May 24, 2013 by Dr_joel
after completion of a single port waveguide calibration, a 0.2dB notch exists at a specific frequency.  the calibration standards are 'home grown' with a an offset short fabricated out of copper with a cavity that has been manufactored via edm and a load that has been deemed 'secondary standard'.  have tried using other loads, loads and offset shorts have been aligned with drill blanks, used gore and minibend cables, pasternack and waveline launchers (wg to coax adapters), port1 and port3 on the pna.  all have the same signature. 

1. is there a switch point in the synthesizer like the older 8360s?
2. turning off the calibration removes this notchk
3. internal load 
4. will be looking at the receivers as well as the internal attenuators, any other suggestions?