I have an SMT microstrip fixture which uses TRL inserts from intercontinental microwave. I have a 3.5" disk with coefficients but cant figure out how to upload cal constants into 8753ES. So I referred to manual on TRL error correction to manually insert coeff. Using short reflection, zero distance thru, and Line 1, I entered user defined parameters. Modify standards, assign standard class, label class, label kit, save user kit. 3x. I realize I must be doing something wrong. Can anyone give me some ideas or tell me how to upload from 3.5# disk.
> I have an SMT microstrip fixture which uses TRL inserts from intercontinental microwave. I have a 3.5" disk with coefficients but cant figure out how to upload cal constants into 8753ES.
Try this
* Power on, or press "Preset" if already on
* Insert floppy
* Press the "Save/Recall" key
* Press the softkey for "Select disk"
* Press the softkey "Internal disk"
At this point, assuming your floppy drive still works, you should get a list of the files on the floppy.
* Press the softkey "Return"
* Use the knob to select a file
* Press the softkey "Recall state"
that will then load the coefficients into the USER kit.
> So I referred to manual on TRL error correction to manually insert coeff. Using short reflection, zero distance thru, and Line 1, I entered user defined parameters. Modify standards, assign standard class, label class, label kit, save user kit. 3x. I realize I must be doing something wrong.
It is very easy to go wrong with defining the coefficients manually. The menu structure is pretty poorly thought out. I once see a comment that bit was either written by a disgruntled employee or an intern! There are some notes on my website about some of the issues.
Personally if I were going to modify a TRL cal kit, then I'd start with one that is similar. The most similar kit I can see in the 8753ES firmware (mine has the latest 7.74) is the 85052C 3.5 mm kit.
Note, that the 8753, being a 3-receiver VNA, can't do a true TRL cal - only TRL*. It is best to stick a high quality 6-10 dB attenuator at each cable, so there is a good match. You should be able to find information about that in the 8753ES manual and/or some Agilent application notes.
> Can anyone give me some ideas or tell me how to upload from 3.5# disk.
Hopefully I have!
Dave
Edited by: drkirkby on Oct 9, 2015 9:03 AM