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I am using NanoVna saver software and the last action in the calibration dialog is "isolation". How do I do it or how it differs from "open" calibration?

Regards
LM

Preferably, with a 50 ohm load on both ports. If you only have one, put it
on "ch1" (port 2 - confusing numbering).

Isolation tries to establish and cancel out the base level of noise in the
passive channel of the device.

(At least that's how I've been taught it)
--
Rune / 5Q5R

On Mon, 14 Oct 2019 at 19:13, Rune Broberg <mihtjel@...> wrote:

Preferably, with a 50 ohm load on both ports. If you only have one, put it
on "ch1" (port 2 - confusing numbering).

Isolation tries to establish and cancel out the base level of noise in the
passive channel of the device.

(At least that's how I've been taught it)
--
Rune / 5Q5R

Noise is a random error that can not be cancelled by the calibration
procedure.

The calibration procedure attempts to remove only systematic errors, one of
which is internal leakage between different parts of the VNA, or leakage
externally to the VNA. The isolation measurement attempts to remove the
leakage.

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

Of course: Leakage, not noise. Thank you. :-)

--
Rune / 5Q5R

On Mon, 14 Oct 2019 at 22:59, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:

On Mon, 14 Oct 2019 at 19:13, Rune Broberg <mihtjel@...> wrote:

Preferably, with a 50 ohm load on both ports. If you only have one, put

it

on "ch1" (port 2 - confusing numbering).

Isolation tries to establish and cancel out the base level of noise in

the

passive channel of the device.

(At least that's how I've been taught it)
--
Rune / 5Q5R

Noise is a random error that can not be cancelled by the calibration
procedure.

The calibration procedure attempts to remove only systematic errors, one of
which is internal leakage between different parts of the VNA, or leakage
externally to the VNA. The isolation measurement attempts to remove the
leakage.

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