[SI-LIST] Re: Calibration VNA question
- From: "Antonis Orphanou" <orphanou@xxxxxxxxxxxx>
- To: "Navroop.Singh@xxxxxxxxxxxxxxxxxxxxxx" <Navroop.Singh@xxxxxxxxxxxxxxxxxxxxxx>, "l.boglione@xxxxxxxx" <l.boglione@xxxxxxxx>
- Date: Fri, 11 May 2012 21:51:18 +0000
Usually the calibration sequence will request for the THRU delay. For the THRU
standard this delay is specified by the kit manufacturer. If you want to add
additional delay, due to additional fixtures, you have to calculate that delay
yourself. In addition some software can move the reference plane.
In both cases, you have to know the particular phase delay between the standard
calibration and the fixtures you are using.
The above will assume that the fixture is just a linear phase (fancy way of
saying dispersion-less) and lossless. Depending on the fixture you might want
to actually de-embed it from your measurement to account for the loss as well.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Singh, Navroop
Sent: Friday, May 11, 2012 2:22 PM
To: l.boglione@xxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Calibration VNA question
Hi Luciano,
Thanks for your response.
What about "thru" calibration ( for S21 or S12) then. I am using a SMA extender
connector and connecting ports to the opposite ends for "thru" calibration.
Does the length of the extender matter in this case. How does VNA accounts for
the length.
P.S. - I am very naïve in this area. Just learning about VNA and calibration
stuff.
Regards,
Navroop
-----Original Message-----
From: Luciano Boglione [mailto:l.boglione@xxxxxxxx]
Sent: Friday, May 11, 2012 12:12 PM
To: Singh, Navroop
Cc: si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Calibration VNA question
Navroop,
The VNA calibration sets the measurement plane wherever the standards are
connected to. If your SOL standards are connected at the end of a cable, the
measurements will be referred to that end of the cable.
Luciano
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Singh, Navroop
Sent: Friday, May 11, 2012 1:55 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Calibration VNA question
Hello All,
I am struggling to understand the calibration process of VNA. I am doing open,
short and Load calibration with calibration kit. I understand that when
calibration is done the measurement plane is set to the end of the coaxial
cable.
Here is my dilemma:
When we are doing calibration with a calibration kit , the actual location of
short , open and load point is at some delay from the end of the coaxial cable
( I have attached coaxial cable which have SMA termination ). Is that delay is
already accounted in the calibration or we have to do port extension to
compensate for that delay ?
Thanks in advance for your suggestions and opinions.
Regards,
Navroop
(Please note new email address below and change your records)
________________________________________________________________________
_________
Navroop Singh | Pelco by Schneider Electric | Buildings Business
| United States | Electronic Engineer
Phone: +1-559-388-5345 | Toll Free: +1-800-289-9100 | Fax:
+1-559-388-7156 |
Email: navroop.singh@xxxxxxxxxxxxxxxxxxxxxx
<mailto:navroop.singh@xxxxxxxxxxxxxxxxxxxxxx> | Site:
www.schneider-electric.com <http://www.schneider-electric.com/> |
Address: 3500 Pelco Way,Clovis,CA 93612-5699 USA
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