Date   
Re: ANDROID SDR SOFTWARE for HF+?

BryonB
 

We got teased once with a picture of an app running on a watch displaying data from SpyServer, but as far as I'm aware of nothing like that has been released. 

I too would like to see an Android app. 

I have an app that was released for use with another SDR radio that works well enough, but it doesn't support the AirSpy radios, or SpyServer.

I've been kinda holding off building a mini Raspberry Pi server to run SpyServer on until there are more client options. I have one tiny 8" Windows tablet that can run SDR# sort of, but SDR# isn't really optimized well for tiny screens without a mouse. If I have to lug a larger PC or laptop with me, I can almost as easily lug an additional AirSpy, cables and antenna.


On Sat, 31 Aug 2019 8:01 pm Ray, W4BYG, <w4byg@...> wrote:
I have an HF+ which I have used a little as a panadapter with my PC and Kenwood TS-590SG,  I also have a 10" Samsung tablet. 

I wonder if there is an SDR app for Android the would work with the HF+ and tablet, or would it be too much demand on the tablet processor?  I don't mind providing external power for the HF+ if need be.

Your attention is appreciated.
Ray, W4BYG
--
Socialism ia a philosphy of failure, the creed of ignorance and the gospel of envy.
It's inherent virtue is the equal sharing of misery...  Winston Churchill

Virus-free. www.avg.com

ANDROID SDR SOFTWARE for HF+?

Ray, W4BYG <w4byg@...>
 

I have an HF+ which I have used a little as a panadapter with my PC and Kenwood TS-590SG,  I also have a 10" Samsung tablet. 

I wonder if there is an SDR app for Android the would work with the HF+ and tablet, or would it be too much demand on the tablet processor?  I don't mind providing external power for the HF+ if need be.

Your attention is appreciated.
Ray, W4BYG
--
Socialism ia a philosphy of failure, the creed of ignorance and the gospel of envy.
It's inherent virtue is the equal sharing of misery...  Winston Churchill

Virus-free. www.avg.com

Re: SDR# Can't Open HF+ Discovery

Dan Rae
 

On 8/31/2019 11:28 AM, Wes Stewart via Groups.Io wrote:
Absolute newby here. I don't know what OS is being used, but on my Win7 machine, if I expand  "Universal Serial Bus Device", I see "WinUSB Device".

Wes  N7WS

Wes, I struggled a bit with getting my win7 machine to see the HF+.  It needed a download from the Airspy site of the wincompatibility zip file, at the end of their list of downloads. Unzip it to a folder somewhere, then the computer should be able to find it the next time you plug in the HF+, or maybe the time after that :^)

Dan - ac6ao

Re: SDR# Can't Open HF+ Discovery

Wes Stewart
 

Absolute newby here. I don't know what OS is being used, but on my Win7 machine, if I expand  "Universal Serial Bus Device", I see "WinUSB Device".

Wes  N7WS

Re: SDR# Can't Open HF+ Discovery

jdow
 

Device manager - under "Universal Serial Bus Device" you should see "Airspy HF+". If it is not there make sure the cable is plugged in. It should take very little force to get it in once the connector is aimed correctly.

Usually when such a device is plugged in you hear a plugin sound and/or receive a notification that it is plugged in and the driver is being loaded.

{^_^}

On 20190830 16:49:51, JAMES RYBAK wrote:
I reinstalled the SDR# software with the latest version.  That was one of my problems.  Now I can select "AIRSPY HF+ Dual/Discovery" for "SOURCE."  However, when  I click on  the START arrow, I still get the message "Cannot open AIRSPY HF+ Dual/Discovery device."  I checked the Device Manager and there doesn't seem to be any problems indicated although I can't figure out where my Discovery shows up there.  I've removed the HF+ Discovery and reinserted it but I don't see any changes in the Device Manager between when it's plugged in and when it isn't.  Please HELP!

Re: Standalone use of AirSpy HF+ Discovery with Teensy 4.0 microcontroller ?

DD4WH
 

Thanks for your comments!

Its meant as my personal hobby ham radio project, not a commercial product. NDA --> OK, just to make sure I understand this correctly: it is not possible for me to talk directly to the ST chip, because I do not know the details of the registers etc (which are under NDA). So my only way to get access to the I&Q samples is via USB host, is that right?

The Teensy 4.0 seems to support USB host mode and there is a dedicated library for that purpose. Also there is a breakout board bringing out the USB host connections. So, the prerequisites are there. Yes, I feared it would be a big hill to climb. But I still do not know how high it is and whether I will manage it :-). Is there some kind of documentation of the AirSpy USB commands or description of the USB functionality apart from the C code on github here ?

https://github.com/airspy/airspyhf/tree/master/libairspyhf/src

Can you give me some hint where I could start with my understanding of the code and the AirSpy-specific commands via USB? (I am not an engineer, I just learned some embedded DSP coding the last years, but never had to deal with USB)

Thanks for your help so far and thanks in advance for further hints!

Frank DD4WH

Re: Standalone use of AirSpy HF+ Discovery with Teensy 4.0 microcontroller ?

ebrombaugh1@...
 

In order for this to work you'll need the Teensy to support USB Host mode, which means it must be able to supply VBUS to the USB port and read the USB ID signal. These functions usually require extra components on the board and I'm not certain if the USB-C connector on the Teensy 4.0 is so equipped. If it is then you'll have to learn how the PJRC and/or NXP support libraries implement host mode and write the code necessary to initialize and enumerate the bus and control the Airspy. It's a big hill to climb.

If the Teensy 4.0 board does not support host mode on its USB-C connector you may still be able to make this work if you can build outboard hardware for the 2nd USB port on the iMXRT1062 MCU. I haven't been able to find full schematics for the Teensy 4.0 so I'm not sure if the 2nd port is available on the headers though.

Re: Standalone use of AirSpy HF+ Discovery with Teensy 4.0 microcontroller ?

prog
 

I am working on a very similar project. I bypassed the USB stack altogether. The problem here is that most of the code is under NDA.

Standalone use of AirSpy HF+ Discovery with Teensy 4.0 microcontroller ?

DD4WH
 

My idea is to use the AirSpy HF+ Discovery together with the Teensy 4.0 microcontroller (Cortex M7 600MHz) as a standalone SDR Receiver.

I am not sure whether that is possible.

The DSP side is not the problem, I have already implemented code on the Teensy for an audio low IF SDR receiver which takes the I & Q samples and does demodulation, NR, NB, spectrum display etc. Its working fine with a simple Tayloe mixer frontend.

Now I am looking for a place to start with the AirSpy and I am wondering how the Teensy could talk to the AirSpy and receive the I & Q samples through the USB socket. We would have to start with a low sample rate, so that the Teensy can do all the processing, I understood that the AirSpy can use low sample rates (because the Teensy would probably not be fast enough to process at the max sample rate of 768ksps, I was thinking of 96ksps or even 48ksps, maybe 192ksps for WFM).  

Could somebody point me to information or even sample code that could be used to make the Teensy microcontroller talk to the AirSpy Discovery HF+  and receive the I & Q samples? I am a bit familiar with DSP and SDR  C code, but I am totally missing knowledge and information on how to receive samples over USB and I would be willing to learn about that and eventually implement a small and modest standalone receiver with the Teensy 4.0 and the AirSpy Discovery HF+.

Thanks in advance for any hints, links, information etc.!

All the best,

Frank DD4WH

Re: Discovery

Marino Ferrero Giacminet
 

Mine arrived monday 26, shipped by Itead august 9 or 10 via registered airmail. No vat no custom duties; same as when I purchased the HF+ two years ago.

Marino Ferrero Giacminet

Il 30 ago 2019, 23:48 +0200, Bjarne Mjelde <bjarne.mjelde@...>, ha scritto:
Mine took four days via Air Mail from Shanghai to Oslo. Then, another four days to where I live... No VAT was charged so I don't really complain.
--
Bjarne Mjelde
World's Northernmost DX-er
arcticdx.blogspot.com
Arctic web-rx:  kongsdr.proxy.kiwisdr.com:8073

Re: New Noise Reduction Algorithm?

Ian DXer
 

PF> I may be missing something, but I just installed v.1715 and the IF noise reduction menu looks exactly the same as in 1710 and previous. It doesn't have any of that "Custom", etc.

Hi Pete,

In either the Audio Noise Reduction or IF Noise Reduction pull down menus and just under those you will have a label titled 'Profile'. Click on the pull down arrow button & you will be presented with 5 different profiles starting
with HiFI & ending with Custom. When you hit 'Custom' you will be presented with many slider controls to play with to your hearts content. 
The Custom controls do differ a little to much earlier SDR# releases. eg 'quality' slider control gone, but new is the 'slope' control.
The "new algorithm" is part of the recent SDR# releases program code.

Hope that helps.

Ian

Re: SDR# Can't Open HF+ Discovery

JAMES RYBAK <jprybak@...>
 

I reinstalled the SDR# software with the latest version.  That was one of my problems.  Now I can select "AIRSPY HF+ Dual/Discovery" for "SOURCE."  However, when  I click on  the START arrow, I still get the message "Cannot open AIRSPY HF+ Dual/Discovery device."  I checked the Device Manager and there doesn't seem to be any problems indicated although I can't figure out where my Discovery shows up there.  I've removed the HF+ Discovery and reinserted it but I don't see any changes in the Device Manager between when it's plugged in and when it isn't.  Please HELP!

Re: Discovery

Bjarne Mjelde <bjarne.mjelde@...>
 

Mine took four days via Air Mail from Shanghai to Oslo. Then, another four days to where I live... No VAT was charged so I don't really complain.
--
Bjarne Mjelde
World's Northernmost DX-er
arcticdx.blogspot.com
Arctic web-rx:  kongsdr.proxy.kiwisdr.com:8073

Re: Discovery

peter.eade@...
 

Same here.

 

LATEST EVENT

 

Arrived at sorting center

Shanghai, Shanghai, China

 

13 Aug 19 08:52 PM

 

From: airspy@groups.io [mailto:airspy@groups.io] On Behalf Of Michal Fratczak
Sent: Saturday, 31 August 2019 5:36 AM
To: airspy@groups.io
Subject: Re: [airspy] Discovery

 

I'm still waiting for mine...
Last update from 18th
  2019-08-18 03:00, Pudong, Shanghai Airlines

Re: New Noise Reduction Algorithm?

Pete Ferrand
 

I may be missing something, but I just installed v.1715 and the IF noise reduction menu looks exactly the same as in 1710 and previous. It doesn't have any of that "Custom", etc. I just did a plain install and didn't change any of the config or other files on a Windows 7 32 bit system with a Discovery.

How do I get to the new algorithm?

Thanks
Pete
WB2QLL

Re: Discovery

Michał Frątczak
 

I'm still waiting for mine...
Last update from 18th
  2019-08-18 03:00, Pudong, Shanghai Airlines

Airspy HF+ Discover: Spurious?

Nils Schiffhauer
 

Hi - there has been & still is running a discussion in a German forum
about "Airspy HF+ Discovery & Spurii".

Because I was interested in this topic, to which I didn't bumped into
during my detailed tests of the Discovery for Radiouser magazine, I
scrutinized this and laid down the results in a short paper: Much Ado
about Nothing.

The paper can be downloaded at:
https://dk8ok.files.wordpress.com/2019/08/spurious.pdf

Thanks to Youssef & his team for another smart SDR: Nils, DK8OK

--
dk8ok.org

Re: Airspy HF (+ and Discovery)

Philippe Nicolas
 

So the program doing the scan has to be smart…!

Thanks

Le 30 août 2019 à 15:51, prog <info@...> a écrit :

On Fri, Aug 30, 2019 at 12:27 PM, Philippe Nicolas wrote:
Could you please tell me how frequencies per second both AirspyHF are able to scan ?
It seems there are large differences on this matter between SDR.
It depends on how you scan, the spacing of the "frequencies", their bandwidths and the used sample rate in the device.
A "dumb scan" that naively retunes the SDR for every step will be extremely slow.
A "smarter scan" would jump by the alias-free bandwidth of the SDR, collect some data for the FFT then scan all the frequencies within the visible spectrum at once. The length of the FFT can be made sufficiently long for a reliable detection of the very narrow band signals, which will increase the data collection between the FFTs.

Sorry if you were expecting a simple yes/no/number answer. Unless you give the exact engineering parameters, no one knows for good.




Re: Airspy HF (+ and Discovery)

prog
 

On Fri, Aug 30, 2019 at 12:27 PM, Philippe Nicolas wrote:
Could you please tell me how frequencies per second both AirspyHF are able to scan ?
It seems there are large differences on this matter between SDR.
It depends on how you scan, the spacing of the "frequencies", their bandwidths and the used sample rate in the device.
A "dumb scan" that naively retunes the SDR for every step will be extremely slow.
A "smarter scan" would jump by the alias-free bandwidth of the SDR, collect some data for the FFT then scan all the frequencies within the visible spectrum at once. The length of the FFT can be made sufficiently long for a reliable detection of the very narrow band signals, which will increase the data collection between the FFTs.

Sorry if you were expecting a simple yes/no/number answer. Unless you give the exact engineering parameters, no one knows for good.



Re: New Noise Reduction Algorithm for SDR#

Ian DXer
 

>The Boost SNR function is still working, but the visual feedback in the Zoom FFT plugin was not enabled because the DNR plugin was moved in the processing chain to the last position. I implemented that properly now.
>Thanks for the feedback!

Your welcome - easy to report.
Thanks very much for the prompt fix & feedback - much appreciated as always Youssef.

Also good to read post by kb3cs re IF Noise Reduction setting that works for him on set band etc.

Ian