Regarding my E5062A I see that in the pull-down menu for cal kits, when the 85032 kit is opened up and examined I only see a total of (4) CLS definitions yet there are (6) components in that cal kit, OPEN(m), OPEN(f), SHORT(m), SHORT(f), THRU, and LOAD. Should there not be a CLS associated with each element in a cal kit? I wish the manual talked a little bit about the function of CLASS (CLS) and how they are used.
You didn't mention which 85032 kit you inspected on your E5061A. From the description, I'm assuming it was the 85032F because you said there wasn't a standard for all 6 devices in the kit. From the VNA support web site, you can see the most current definitions for all current cal kits. Keysight Cal Kit Page If you click on the ENA cal kit for 85032F, you will see that the definitions for the opens and shorts are the same for male and female. So the ENA firmware probably supplies one set of coefficients for shorts and opens and refers both sexes to the same set. I don't have an ENA in front of me right now, but I'm pretty sure that's what you're seeing. Look at the 85032B and you will find that male and female are different there.
DH
Hi Drew and TU for the reply. Ok we are getting very close to defining the issue. I also am not right in front of my ENA but regardless of the actual kit number this is the issue.....I have in fact a custom generated kit that has 8 STD's in it (male & female SHORT, male & female OPEN, a male & female LOAD, and a THRU) and in this case all the male & female OPEN STD's do have different coefficients. Luckily the male and female LOAD's have the same coefficients so we can sort of count the LOADS as only one as far as defining a CLS for it.
The issue I am having is associating a CLS to each of those STD's. I assume each and every STD (that have different coefficients) must have a CLS associated with it no? Under SPECIFY CLS's you see a button for OPEN, SHORT, LOAD, and THRU and then RETURN. Each one of these let's you associate only ONE STD for PORT-1 & PORT-2. This leaves me with two STD's w/o a CLS associated to them. Consider the worse case situation.....this ENA allows up to 21 STD's to be entered into a particular kit. What if by chance each of those 21 STD's had different coefficients? How in the world would you then associated a CLS to so many STD's?
I see this as a problem but there is nothing in the users manual or reading I found online to help me determine if this is going to be a problem during an actual port calibration and more importantly how to resolve it.
Yes. But class definitions are different in early ENAs. The E508x series are the same as PNA. You can add as many standards to a class as you want. The default is to have both male and female standards available in each class. The early ENA class assignments allow one device per class and the have a class for each port. So the default assignment is for Open(m) on port 1 and Open(f) on port 2. And this is the old VNA notation where they define standards by the sex of the port it is connecting to. So the Open(m) is for a male port, and that's a female open. If you adhere to the default settings, male devices on port 1 and female devices on port 2, that's ok. But if you want to reverse those, or do male-male or female-female devices you need to redefine the classes. These really only matter for the opens & shorts. The fixed loads in these kits are treated as broadband loads. That means the load is assumed to be perfect and the Smith chart is normalized (centered) on the measurement of the load. If you pick the load class, you'll see that there is only "Broadband" load, no (f) or (m). I hope this helps.
Hi Drew and TU for working with me on this. First of all a big apology. I have been reading the manual so much which is titled E5061/E5062 User & Service Manual I by mistake called my unit a 5061A....it is in fact an E5062A. Sorry abt that.
I understand what you said above but I guess my question then is how do you actually assign the same class to more then one STD when they have different or unique coefficients?
If I may I would like to describe my kit as it is currently entered (STD's & CLS's) and then I would like to know how to assign the required classes to #7 & #8 STD's which seem to be left out. Also, I have two loads, a Load(m) and a Load(f) but their coefficients are the same thus I just entered them as one Load and called it STD#3. The remaining STD's have unique coefficients and have been defined as:
STD #1=Short(m), STD #2=Open(m), STD#3=Load, STD#4=Thru, STD#7=Short(f), STD#8=Open(f).
Enclosed is a picture of how I defined the CLS's. Please note that STD's 1,2,3,4 have been associated to a CLS but I have run out of places to define the CLS for STD's 7 & 8.
You didn't mention which 85032 kit you inspected on your E5061A. From the description, I'm assuming it was the 85032F because you said there wasn't a standard for all 6 devices in the kit. From the VNA support web site, you can see the most current definitions for all current cal kits. Keysight Cal Kit Page If you click on the ENA cal kit for 85032F, you will see that the definitions for the opens and shorts are the same for male and female. So the ENA firmware probably supplies one set of coefficients for shorts and opens and refers both sexes to the same set. I don't have an ENA in front of me right now, but I'm pretty sure that's what you're seeing. Look at the 85032B and you will find that male and female are different there.
DH