On Tue, 15 Oct 2019 at 20:28, Dr. David Kirkby <
drkirkby@...> wrote:
TRL calibration requires a VNA with 4 receivers. The HP 8753 series, which
have 3 receivers, can perform something HP refer to as TRL*. This requires
a good match at the test ports - typically 6 to 10 dB on each test port. It
is not as good, but it is not possible to do true TRL calibration on a
simple VNA.
What I meant to say is that when using TRL* calibration on an HP 8753, 6
to 10 dB attenuators need to be added to the test ports of 8753 VNAs.
The 8720D instrument I have, was available with an optional 4th receiver to
allow full TRL calibration. It was option 400 and quite expensive. My
instrument doesn¡¯t have that capability.
Also a full S-parameter test set is needed.
I don¡¯t believe that TRL, or any similar calibration procedure, will be
possible with a simple VNA.
Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom
