Рубрика «Англоязычные»

Comment on NanoVNASaver Software Walkthrough + NanoVNA Firmware Updates Bring 1.5 GHz Max Range by Paul

Device manager shows the PORTS (COM & LPT) and STMicroelectronics Virtual COM PORT with No error message (“This device is working properly”).
The error message I quoted in my previous message appears regardless I have Nano-VNA connected or not to PC…
I asked a friend of mine who does not have Nano-VNA meter but has win 7 (64bit) installed on his PC to downloaded and run nanovna-saver-v0.2.2-1.exe. And he was successful. So maybe there is something wrong with Win 7 config on my PC?

Comment on NanoVNASaver Software Walkthrough + NanoVNA Firmware Updates Bring 1.5 GHz Max Range by Peter Kirk

Paul, probably the driver signature issue causing the python script to fail.

1) Connect your nanoVNA to the usb port and make sure the nanoVNA is turned on.
2) Windows should generate a sound if it detects the presence of your device (you may see a driver msg in lower right of screen)
3) Open your system device manager and check for a driver error in the PORTS (COM & LPT)
or under VIRTUAL COM PORTS
4) If you see the following driver error: STMicroelectronics Virtual COM PORT, then you probably need to sign the usbser.sys driver as per my previous post. (make a back up a copy of the original usbser.sys for piece of mind)
cheers

KerberosSDR • one of my kerberossdr isnt working

I bought several kerberossdr.
One of them is strange. The software on raspberry pi can't receive its samples. Then, I did rtl_test, and got register failure.

What can be wrong? Please help!

Please see the attached photo of my test.
101586058602_.pic_hd.jpg

Statistics: Posted by jamesshao8 — Sun Apr 05, 2020 1:11 pm


Comment on NanoVNASaver Software Walkthrough + NanoVNA Firmware Updates Bring 1.5 GHz Max Range by Paul

Peter, Thanks for your response. When I try to run nanovna-saver-v0.2.2-1.exe in cmd window I am getting the following message:
C:\User\Admin>nanovna-saver-v0.2.2-1.exe
Traceback (most recent call last):
File “nanovna-saver.py”, line 17, in
File “c:\user\ieuser\appdata\local\programs\python\python37-32\lib\site- packages\PyInstaller\loader\pyimod03_importers.py”, line 627, in exec_module
File “NanoVNASaver\_main_.py”, line 21, in
ImportError: Dll load failed: The specified module could not be found.
[376] Failed to execute script nanova-saver
=================================
Have you had the same error message or something else?

6MSPS baseband recording into external storage media

I recently managed to pull semi-decent HRPT from weather sats, however my setup requires I do a baseband recording of each pass before decoding at 6MSPS. That's not that much data for a modern fast disk, but the laptop I use has a rather old 100GB SSD that can only fit two HRPT recordings and I'm pretty sure constant rewrite cycles like this are very damaging for it.

I tried re-routing the baseband from SDR#, first into a USB flash drive. That had its buffer filled after a few hundred MB, after which it just dropped all the remaining data. Then I managed to get the laptop's SD card reader working which seems to be a bit faster than the flash drive, but its buffer also filled up fast, after about 2GB of recording (a full HRPT pass at 6MSPS can be over 25GB).

I've now been thinking if I should rather buy an external USB 2.0 HDD. In theory, because the raw data all comes from a USB 2.0 SDR in the first place it should handle the 6MSPS write rate just fine, but I'm quite aware that the real-world performance may be quite different.

So I want to ask if anyone has experience with USB 2.0 HDDs and such high sample rate baseband recordings.

Also, if I buy a 3.0 drive that's backwards compatible, will that ensure that it's using the full capability of 2.0? Because I know that some storage mediums (particularly flash drives) actually are slower than the USB 2.0 protocol so they don't make full use of it. For example, the flash drive I used is 3.0-compatible but, as I mentioned above, couldn't handle more than a few hundred MB of baseband through a 2.0 port

(needless to say the laptop has no 3.0 ports)

submitted by /u/derekcz
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Comment on OpenEar: An Easy to Use Windows TETRA Voice Decoder by Anonymous

Hopefully frequency field gets more decimal places, now it has three … you can enter e.g. 434.562 but not 434.5625.

RTLSDR + LNA ELI5

I have a RTL SDR and was interested in a LNA but what exactly does it do? My experience with amplifiers in amateur radio amplifies the RF signal going out, I’m assuming this makes the antenna increase in gain by added the LNA. Am I on the right track?

submitted by /u/sergeantMcAsshole
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User Projects • Re: OpenEar will be new software for listening to Voice and data of protocols(Tetra, DMR, MPT,…)

Hopefully frequency field gets more decimal places, now it has three … you can enter e.g. 434.562 but not 434.5625.

Statistics: Posted by rtlsdrdev-user — Sun Apr 05, 2020 7:26 am


New setup, SDRSharp just stops!

Hi Everybody,

This morning I have been trying to get SDRSharp v1.0.0.1732 working with my RTL-SDR. This is a Win10 64 install on an older HP Probook laptop.

Everything seemed to go smoothly... but SDRSharp just seems to quit after a time (usually within 10 mins) without warning.

This can be while it is in standby or if it is receiving. I can leave it running and then I turn my head back and it's gone! I've got two RTL-SDR dongles and it does the same thing with both.

Even with no RTL-SDR present it will quit on me after a random time (5-10 mins) of sitting idle.

Where do I begin to start diagnosing where the problem lies?

Michael
VK5ZEA

submitted by /u/original_lunokhod
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No output sound and error messages using DSDplus

No output sound and error messages using DSDplus submitted by /u/Nico_Briggs
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