Архив за Октябрь, 2019

KerberosSDR • Turning off spectrum display

As I read - and it makes sense to turn off 'Spectrum Display' in order to reduce CPU load - improve performance. How about the DOA graphing(not phase differential calculations, but the DOA graph display cannot be turned off?) - is there a performance hit for continual plotting of the DOA graph?

Statistics: Posted by myke — Mon Oct 21, 2019 11:54 pm


Other SDR Devices • Re: NanoVNA software mod

on1bes wrote:
Mon Oct 21, 2019 10:08 pm
After connecting you do Get data. Screen is then Logmag S11 & S21. The 2 curves are visible.
Then choose Chart format: VSWR S11. The screen is then blank. If you now click on the lower Auto (Y Min), the program will stop and with an error message:
"An unhandled exception has occurred in the application ...."
thanks for the report. I can reproduce this issue. You can avoid this error by setting higher Auto (Y Max) first. I will fix it soon.

Statistics: Posted by qrp — Mon Oct 21, 2019 10:52 pm


Other SDR Devices • Re: NanoVNA software mod

Hello Erik ?
In our Radio Club we have different people with the NanoVNA. The NanoVNA extensions are more than welcome. The RESET with Calibration and the screen dump are especially useful. I did a quick test in Win10 and it works well. I only found one bug, but it was already in the previous version:
After connecting you do Get data. Screen is then Logmag S11 & S21. The 2 curves are visible.
Then choose Chart format: VSWR S11. The screen is then blank. If you now click on the lower Auto (Y Min), the program will stop and with an error message:
"An unhandled exception has occurred in the application ...."
"Axis object - the minimum value of the axis is higher than the highest value for a data point."
This error is always reproducible.
You must always close the Software and restart it.
This is a translation. I only have the error message in Dutch.
73's Herman on1bes
Error.jpg

Statistics: Posted by on1bes — Mon Oct 21, 2019 10:08 pm


Other SDR Devices • Re: NanoVNA software mod

cudgel wrote:
Mon Oct 21, 2019 5:28 pm
_v2 version is more stable.
What is your issue? What is unstable in v3?

Statistics: Posted by qrp — Mon Oct 21, 2019 6:35 pm


Help receiving ~437 MHz Cubesat Signals

Hi everyone. I'm working on a school project which involves receiving cubesat signals in the 437 MHz range. I've successfully done this before in the ~137 MHz range but unfortunately I'm struggling a lot with this. Can anyone point me in the direction of a helpful guide? We need something that is omnidirectional.

Yesterday we tried to make a QFH antenna but after testing multiple passes we were not able to receive anything. I'm not quite sure if we made it correctly. We were using this calculator to make it, but used the same diameter for both loops as we wrapped the wire around a 4 inch 2 liter bottle. Has anyone used this website before?

submitted by /u/siyman4
[link] [comments]

Other SDR Devices • Re: NanoVNA software mod

_v2 version is more stable.

Statistics: Posted by cudgel — Mon Oct 21, 2019 5:28 pm


RTL-SDR Discussion • Re: best place to ask sdrplay questions

here

https://www.sdrplay.com/support/

or here

https://www.facebook.com/groups/sdrplay

Statistics: Posted by Jekko — Mon Oct 21, 2019 3:40 pm


Other SDR Devices • Re: NanoVNA software mod

Version 3 released :)

screenshot.png
What's new:
- added CAPTURE button, which allows to get screenshot from the NanoVNA
- completely rewritten from scratch communication layer, now it works more reliable
- improved error handling
- fixed calibration bug (calibration code is reworked and now works as expected, added RESET button for calibration)
- improved user interface for calibration (button highlighting, etc)
- fixed frequency setup issues
- improved support for different firmware versions
- improved S1P and S2P export
- added firmware version detect (firmware version now is displayed in the app title)
nanoVNA_mod_v3.zip

Statistics: Posted by qrp — Mon Oct 21, 2019 1:10 pm


Troubleshooting Help • Re: HDSDR waterfall

Thanks Phil....I'm getting used to it myself, and you're right about it coming up from the spectrum display below. It's a slick program!

73, Bruce, VE3EAR

Statistics: Posted by VE3EAR — Mon Oct 21, 2019 12:54 pm


troubleshooting interference

I have a signal that stays even when I change Frequencies. and unsure what might be causing it. I'm in the plans on buying Ferrite beads, and an Active USB cable because I almost live in a natural Faraday cage in my bedroom. (apartment so best I can do is move Antenna)

few photos.

https://gyazo.com/394e8cbfe5518a18f0443590f5291b54

https://gyazo.com/8ea519b250b4c3f8affd16e625ad6a8f

📷
https://gyazo.com/cbf478664406d7cafa98f73eaa634752

submitted by /u/deanec64
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