Hello Kurt. Thanks very much for the feedback describing how things have moved on. You say NanoVNA-saver can increase the number of steps, but can it also reduce the step size? Even 101 points with 1Hz steps would be usable, but the default 100Hz steps make it unusable for this application. 1Hz steps really are a mandatory requirement when measuring crystals.
Best wishes,
Alan
toggle quoted message
Show quoted text
On Tue, Oct 29, 2019 at 10:48 PM, Kurt Poulsen wrote:
Hi Alan
This an old design I did only to comport those believing a crystal should be
measured in a 12ohm environment. It has bearings on mesurements with non VNA
instruments
I have totally dropped the attenuators as introducing errors as I mentioned in
the report as figure of merit 100 times worse than without.
The one I use now is shown in attached images.
The NanoVNA-saver can increase the number of point to as many you like so this
way round it can surpasses the 101 point limitation
Kind regards
Kurt
-----Oprindelig meddelelse-----
Fra: [email protected] <[email protected]> P? vegne af Alan G3XAQ
Sendt: 29. oktober 2019 22:31
Til: [email protected]
Emne: [nanovna-users] Measure crystal motional parameters? Needs 1Hz frequency
steps
There are programs for the N2PK type of instrument that use a fixture like
this
to measure quartz crystal paramters Lm, Cm and ESR. Has anyone done this with
their nanoVNA? I think it will need a firmware change to allow frequency steps
on 1Hz instead of the usual 100Hz.
Thanks,
Alan G3XAQ
