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I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

You might be better off sending it to somebody on list to actually measure
it.

FWIW,

-John

==================

On 2 January 2013 00:26, J. Forster <jfor@...> wrote:

You might be better off sending it to somebody on list to actually measure
it.

FWIW,

- John

Thank you John.

That is no easy task for someone though. Sepparating the offset (in
ps) from the 4 constants in the polynomial descriibing the capacitance
is tricky.

Dave.

I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

On 2 January 2013 00:46, pianovt <pianovt@...> wrote:

I had seen that thread. Though I could not get any more information,
and the question about the BASIC program never got answered.

It would be interesting to get a dimensioned drawing of the bit which
pushes the collect flat on a modern open. My guess would be that it is
as small as possible, using a low-dielectric constant material.

I guess the other approach might be to just buy the open from Agilent,
and "upgrade" the kit to a late model, which will be supported by the
VNA.

I put the load from that kit on a high quality N-> APC-7 adapter, and
to at least 6 GHz (the limit of my N calibration kit), the load is
very good, despite being rated at just 2 GHz. But getting a 909F (18
GHz load), is not too hard. There are plenty of them on eBay.

APC-7 is not that important to me, but since I do have the cal kit,
getting it to work well would be a bonus.

One possibility for APC-7 might be to model it in HFSS, EMPro or similar.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@...> wrote:

I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

------------------------------------

Yahoo! Groups Links

Dave,

The 7mm cal kit was used with the 8753 series and is installed in its firmware. It's not called 11866A, but the open may very well be the same as the one you have. If you post a good close-up picture of your open and short, I will compare them to what I have in the 7mm kit I have. If they look the same, the constants are readily available.

Vladan

On 2 January 2013 01:43, pianovt <pianovt@...> wrote:

Dave,

The 7mm cal kit was used with the 8753 series and is installed in its firmware. It's not called 11866A, but the open may very well be the same as the one you have. If you post a good close-up picture of your open and short, I will compare them to what I have in the 7mm kit I have. If they look the same, the constants are readily available.

Vladan

Thank you, I will do that.

I do have an 8753A here, though it needs repair, as the power switch
will not latch. I'd have to get the wife to hold the power switch in
while I read out the data. At least I assume one can do that in an
8753A - I've never tried ,but it can be done in my 8720D, although I
believe that is a much newer instrument - it is a much higher spec for
sure.

I'll post a picture later today (UK time). I have a decent camera
(Nikon D3, with true 35 mm sensor), with a real macro lens, so getting
a decent picture will not be hard.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@...> wrote:

On 2 January 2013 00:46, pianovt <pianovt@...> wrote:

I had seen that thread. Though I could not get any more information,
and the question about the BASIC program never got answered.

It would be interesting to get a dimensioned drawing of the bit which
pushes the collect flat on a modern open. My guess would be that it is
as small as possible, using a low-dielectric constant material.

I guess the other approach might be to just buy the open from Agilent,
and "upgrade" the kit to a late model, which will be supported by the
VNA.

I put the load from that kit on a high quality N-> APC-7 adapter, and
to at least 6 GHz (the limit of my N calibration kit), the load is
very good, despite being rated at just 2 GHz. But getting a 909F (18
GHz load), is not too hard. There are plenty of them on eBay.

APC-7 is not that important to me, but since I do have the cal kit,
getting it to work well would be a bonus.

One possibility for APC-7 might be to model it in HFSS, EMPro or similar.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@> wrote:

I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

------------------------------------

Yahoo! Groups Links

------------------------------------

Yahoo! Groups Links

Dave,

No need to torture the wife! From your posts, I think you are an excellent candidate for the VNA CalKit Manager:



This little utility has countless constants for all the currently common standards and it allows you to see what they are, download them to, and upload from your VNA. Also, I will be happy to send you the numbers when I get back to work and see the pictures of your standards.

Somewhere on the Agilent web site, I saw a directory that had many, many cal standard definitions. I don't have that bookmarked here, so it will have to wait.

Vladan

On 2 January 2013 04:13, pianovt <pianovt@...> wrote:

Dave,

Hi Vladan,

No need to torture the wife!

She totures me enough, with her almost constant moaning!

From your posts, I think you are an excellent candidate for the VNA CalKit Manager:.

I am aware of that utility, but unfortunately it is only available on
Windows, and the VNA is hooked up to a workstation running Solaris.

But I have written my own software which executes under Solaris (and
should work on Linux too), which quickly uploads the standard
definitions, (C0, C1, Zo, offsets etc) although it can't do the class
asignments (S11A=2,8, S11B=1,7 etc). That's not a problem to me, as
all the kits I've seen that have just opens, shorts and loads have the
same class asignments, so I've never bothered doing anything with
them.

I've been experimenting designing my own calibration kit, so that is
why I have needed the ability to change the standard definitions
quickly.

Once I get the constants, I can write them into a text file, and
upload them. But of course I need to get the constants first. I don't
have a collection like the calkit manager, athough I can read them
from that on a laptop running Windows, write them to a text file on
tthe Solaris worksation, and upload them.

This little utility has countless constants for all the currently common standards and it allows you to see what they are, download them to, and upload from your VNA. Also, I will be happy to send you the numbers when I get back to work and see the pictures of your standards.

I'll send pictures today.

Somewhere on the Agilent web site, I saw a directory that had many, many cal standard definitions. I don't have that bookmarked here, so it will have to wait.

I'm aware of that too.

Vladan

Thank you Vladan.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@...> wrote:

On 2 January 2013 01:43, pianovt <pianovt@...> wrote:

Dave,

The 7mm cal kit was used with the 8753 series and is installed in its firmware. It's not called 11866A, but the open may very well be the same as the one you have. If you post a good close-up picture of your open and short, I will compare them to what I have in the 7mm kit I have. If they look the same, the constants are readily available.

Vladan

Thank you, I will do that.

I do have an 8753A here, though it needs repair, as the power switch
will not latch. I'd have to get the wife to hold the power switch in
while I read out the data. At least I assume one can do that in an
8753A - I've never tried ,but it can be done in my 8720D, although I
believe that is a much newer instrument - it is a much higher spec for
sure.

I'll post a picture later today (UK time). I have a decent camera
(Nikon D3, with true 35 mm sensor), with a real macro lens, so getting
a decent picture will not be hard.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@> wrote:

On 2 January 2013 00:46, pianovt <pianovt@> wrote:

I had seen that thread. Though I could not get any more information,
and the question about the BASIC program never got answered.

It would be interesting to get a dimensioned drawing of the bit which
pushes the collect flat on a modern open. My guess would be that it is
as small as possible, using a low-dielectric constant material.

I guess the other approach might be to just buy the open from Agilent,
and "upgrade" the kit to a late model, which will be supported by the
VNA.

I put the load from that kit on a high quality N-> APC-7 adapter, and
to at least 6 GHz (the limit of my N calibration kit), the load is
very good, despite being rated at just 2 GHz. But getting a 909F (18
GHz load), is not too hard. There are plenty of them on eBay.

APC-7 is not that important to me, but since I do have the cal kit,
getting it to work well would be a bonus.

One possibility for APC-7 might be to model it in HFSS, EMPro or similar.

Dave

--- In hp_agilent_equipment@..., David Kirkby <david.kirkby@> wrote:

I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

------------------------------------

Yahoo! Groups Links

------------------------------------

Yahoo! Groups Links

------------------------------------

Yahoo! Groups Links

On 2 January 2013 00:20, David Kirkby <david.kirkby@...> wrote:

I've got an 11866A APC-7 calibration kit for a VNA. It's only rated
to 2 GHz, but beyond that bit of information, I don't know anything
about it. Does anyone have any data on this particular calibration
kit? I do have the manual for this kit, but it is only a couple of
pages, and not exactly informative.

Does anyone have a VNA which supports the 11866A? If so, perhaps they
could read off the values for C0, C1, C2, C3, and the offset for me,
so I could put them into my VNA as a user calibration.

I suspect, given the location of the reference plane of the sexless
APC-7 connector, for use up to 2 GHz, all APC-7 calibration kits will
be equal, athough some might be more equal than others!

Dave

Since someone emailed me about this, I thought I'd post an update to a
question I asked 10 months ago.

I bought a high-end 85050B cal kit, and measured the 11866A
coefficients myself. I stuck some notes here on the Agilent forum.



For completeness .

SHORT
offset delay =0,
L0=0
L1=0
L2=0
L3=0

OPEN
offset delay =0
C0=81.5
C2=1216.8
C2=131.18
C3=8.6032

By the very nature of the calibration kit, the position of the inner
pin is not fixed, so there will be some variation from connector to
connector, even though the same standard is used. But those
coefficients, which I fitted up to 18 GHz, should be good enough for
most work.

Dave