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Hello Rune,

Unfortunately, quartz filters have a ripple. In the Attachment the plot of an IF quartz filter.
One possibility might be to select rising and falling edges.
Otherwise, I currently have no solution.

Viele Gr????e

Hans-Peter Prast, DL2KHP
=========================================

Hans-Peter, yes, I appreciate the ripple issue.

Perhaps one approach might be to scan for Fmax, Smax and then approach upwards from a low frequency until Smax - 3 dB is reached, and then approach downwards from a high frequency until Smax - 3 dB is reached. I've not programmed that, though, just a suggestion.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web:
Email: david-taylor@...
Twitter: @gm8arv

Also I do not use the "jog" switch.
I drag and drop the markers / and use all menu's by the touch screen.
I also use a simple and very cheap PDA stylus.
It makes life very easy and simple.

73 de Andy

Hello Rune,

Unfortunately, quartz filters have a ripple. In the Attachment the plot of an IF quartz filter.
One possibility might be to select rising and falling edges.
Otherwise, I currently have no solution.

Viele Grü?e

Hans-Peter Prast, DL2KHP

On Mon, Nov 11, 2019 at 07:43 AM, <dhu1342@...> wrote:

Trying one more time to add the attachments

This is part of the problem, then...I thought that AURSINC was not a clone, and not only bought one myself, but, when I found that it works well, I recommended it to others. It WOULD be nice to know who to support.

--
73 de Rich NE1EE
On the banks of the Piscataqua

I have boxed my NanoVNA in an aluminium box, no problems.

For the power switch, I simply connect a switch across the original switch, because you must keep the power connected
to the charger controller / original power to work properly.

For USB connection, I use magnetic USB connector.

73 de Andy

Hello David,

It's just that quartz filters have a ripple. In the attachment the plott of an IF quartz filter.
One possibility might be to select rising and falling edges.


73, Hans-Peter Prast, DL2KHP

Hi, RUne,

I think that the full calibration of the device from Your software would be very useful for people (like me) that are using the nanoVna at 99% from the PC. If possible, please, add this feature ! - thanks in advance ! - Andrea IW2FDH

On Mon, Nov 11, 2019 at 10:07 AM, Gabriel Tenma White wrote:

No, bepissneks does not currently manufacture or sell NanoVNA devices. The
salamander design is a clone of the hugen design. We planned a completely
different design (also si5351 based, switched receiver, 4cm x 3cm board,
better linearity but no LCD) before NanoVNA came out, but didn't make it to
market in time (the existence of the NanoVNA with a LCD made our devices
obsolete), so we are only going for V2 and have no plans to manufacture V1
devices.

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

Thanks for clarifying Gabriel

- Herb

On Mon, Nov 11, 2019 at 01:09 PM, SPACE OPQA wrote:

How to overcome the need to turn off/on every time we plug the USB cable to
PC?

With NanoVNA-Q firmware there is no needs to power off/on after USB connection. It allows to read paused sweep.

Regarding to USB disconnection, the reset happens due to hardware issue. IP5303 just remove power for some short period of time. So, this doesn't depends on firmware. You can keep NanoVNA alive with no reset at USB disconnect by applying external 3.3V power on the SWD connector at the right side of NanoVNA board.

May be adding some capacitor on power line will help to keep it alive with no reset. Needs to try.

Hi Larry, wx is bright overcast, 10 deg C, very nice.
Thanks for comment on my question. Makes me feel better to not worry about overcharging.? 73, Bruce, VE1II

Hi Bruce - how's the weather way down east there? We're getting 10-20cm in Toronto today!

Yes - you can leave it connected to your computer - the IP5303 chip will stop charging the battery automatically.

Cheers,
Larry - VE3LRI

Try on different PC, possibly with different Windows version.

I had similar issue on my PC but after I tried on other one it worked. After I updated firmware, it then worked even on my PC.


--
73,
Pedja YT9TP

Checkout:

Would someone advise me whether it is acceptable to leave my nanovna connected to my computer for extended periods when not actually using it? Does it have circuitry for not over charging the battery? I'm hesitant to connect it and disconnect so often I wear out the usb socket. Many thanks, Bruce, VE1II

On Mon, Nov 11, 2019 at 05:35 AM, Oristo wrote:

Gabriel is the layout designer and RF engineer
/g/nanovna-users/message/3420

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

Gabriel Tenma White posted in an earlier message that, "Currently the 3 players are hugen, flyoob, and bepissneks (parent of OwOComm), and each has designed their PCB layout from scratch, plus the cloners which all seem to copy the hugen layout. Edy555 does not currently manufacture or market NanoVNAs from what I know. "

1. hugen is of course the first person to mass market the NanoVNA and current manufacturer of the NanoVNA-H.

2. flyoob is the manufacturer of the NanoVNA-F.

3. bepissneks (parent of OwOComm), I'm guessing, is manufacturer of NanoVNA with the white salamander design as it is the most marketed clone outside of hugen's.

4. I originally thought Gabriel was a member of hugen's design team but her web presence indicates she is part of OwOComm.

Can anyone confirm the above is correct for future reference?

- Herb

Thanks Qrp !

On Mon, Nov 11, 2019 at 06:53 PM, Andy wrote:

Can anyone tell me what the Correction option is doing ?

Enable/disable error term apply to the measurement result.
When you disable it, NanoVNA shows you uncorrected raw values (with no calibration apply).

On Sun, Nov 10, 2019 at 06:37 PM, Roland wrote:

Tuning is at 438.800 MHz and on the screendump of the software, there is a
huge spike that I didn't see on the NanoVNA display.

You're using Linear scale on NanoVNA display and Logmag scale on PC software. This is why there is difference.

By the way, there is more functional software NanoVNA software for PC:


it allows to capture screenshots and show more trace types.

Can anyone tell me what the Correction option is doing ?

Applying it sends to create some kind of offset by 20db on the S11 display, but if I remove the 50 ohm
load then s11 baseline is minus 20db.

73 de Andy

3 average measurements enabled. Thanks for your excellent software !73 de YO4AUL

Wow. Did you do that with any averaging enabled, or is that just that you
have a very good device?

--
Rune / 5Q5R

On Mon, 11 Nov 2019 at 16:26, Corneliu via Groups.Io <coralenka=
[email protected]> wrote:

Attached is the print screen of the 50 Ohm load sweep up to 1.4 GHz
73 de YO4AUL
On Monday, November 11, 2019, 05:39:19 PM GMT+2, Barry Jackson via
Groups.Io <g4mkt@...> wrote:


On 11/11/2019 15:13, Andy via Groups.Io wrote:

1Hz, wow, that's pretty cool.
I won't write off an upgrade in the future then.
73 de Andy

No don't, I found it really useful for checking an ADS-B RX antenna at
1090MHz. (jpole with 1/4-3/4 wave balun and shorted 1/4 wave stub filter
for rtl-sdr dongle))

See attached.

That output was with the antenna un-tweaked after building from nec2c
dimensions - very impressed with the results.

Cheers,
Barry
G4MKT