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Why is there no APC7 (7mm) or F (75 Ohm) calibration kits in N9912A?

Question asked by drkirkby on Apr 20, 2014
Latest reply on Apr 24, 2014 by drkirkby
Sorry for lots of questions on the FieldFox,  but this is a new tool for me. 

I was wondering just out of interest sake if QuickCal would work with APC7 connectors even though it is not supported. Since I have both the standard 85050B and precision 85050C, comparing QuickCal with the 85050B would have been interesting - at least to me. But it would require the N9912A support a mechanical calibration kit, which it does not seem to do, despite Agilent make several. 

I noticed that one of the connector types shown in the N9912A is the 7 mm. But selecting that shows no kits.  I would have expected to see the 85050B at least, and perhaps some obsolete 7mm kits, but none are shown.  

The same is true for the type F connector, though that is not something I am personally concerned with. Although one can select the 75 Ohm type F connector in the FieldFox, there are no calibration kits to choose from, despite Agilent make the "standard" 85036B and the "economy" 85039B. (Strangely the "economy" version costs about twice as much as the "standard" version!!) 

What is odd is both the 85050C precision 18 GHz APC7 kit and the economy 85039B are in the instrument, as I discovered when using ftp to connect to the FieldFox. (I was hoping to upload an SMA kit, but I can't get the kit to show up properly when uploaded. I have the same issue as the built in kits - I can see the SMA connectors I added, but not the calibration kit). 

The FieldFox was set up to get an IP address via DHCP. It was allocated 

I did not have a Windows PC handy so I could not use the DataLink software. But I wanted to add an SMA kit, so thought I'd use ftp from my Unix workstation. I doubt that using ftp is the best way, but I did discover that there are files present for both the 85050C "precision" APC7 calibration kit and the 85039B "economy" type-F kits,  despite one can't select either on the menus.

'hawk' is my Sun workstation. First I log into the FieldFox using "anonymous" as the user name and some random character as the password,  as documented somewhere on the Agilent web site. 

drkirkby@hawk:/tmp/test$ ftp
Connected to
220 Service ready for new user.
Name ( anonymous
331 Anonymous access allowed, send identity (e-mail name) as password.
230 User logged in, proceed.
Remote system type is Windows_CE.

*Now I am in, lets look around.*

ftp> ls
200 Command okay.
150 File status okay; about to open data connection.
226 Closing data connection.
10 bytes received in 0.0017 seconds (5.78 Kbytes/s)
ftp> cd USERDATA
250 Requested file action okay, completed.
ftp> ls
200 Command okay.
150 File status okay; about to open data connection.
226 Closing data connection.
88 bytes received in 0.14 seconds (0.61 Kbytes/s)

Now change to the 'calkits' directory, where I intended putting a file for an SMA kit I have designed. 

ftp> cd calkits
250 Requested file action okay, completed.
ftp> ls
200 Command okay.
150 File status okay; about to open data connection.
*85050C.xkt (Does not show up as an option, despite being present. I WOULD LIKE TO USE THIS)*
*85039B.xml (Does not show up as an option, despite being present. NOT THAT I CARE TOO MUCH)*
226 Closing data connection.
413 bytes received in 0.1
4 seconds (2.86 Kbytes/s)

What is apparent is that there is a kit for the 85050C, but it is not seen as an option if a 7 mm connector is selected when calibrating. Same for the 85039B.

I suspect that whatever is causing the 7 mm and F connectors to be shown,  but no 7mm or F calibration kits,  is the same as what is causing the SMA connectors of my kit to be shown, but I can't select the SMA kit. 

So any ideas why I can't select the 85050C kit which is in the FieldFox. 

One could reasonably argue that sliding loads are not suitable for use in the field,  but maybe it would be worth having the 85052B (3.5 mm) and 85054B (type-N) kits in the firmware. I see the "economy" 85052D and 85054B are in the firmware, but not the "standard" kits, which have sliding loads in addition to fixed loads. In the case of the 85054B, there is only a low-band load and sliding load, so one can't really use that kit above 2 GHz without using the sliding loads. 

I don't see any waveguide kits show up either, though given the upper frequency limit of the N9912A, it is not surprising. But do they show up in the higher frequency models?? My guess is they probably do not. 


Edited by: drkirkby on Apr 21, 2014 9:46 AM
Edited by: drkirkby on Apr 21, 2014 10:04 AM
Edited by: drkirkby on Apr 21, 2014 10:34 AM

Edited by: drkirkby on Apr 21, 2014 10:47 AM

Edited by: drkirkby on Apr 23, 2014 4:59 PM