Date   

Re: Airspy HF+ Discovery pre-orders are open!

Airspy US
 

We replied directly, but for anyone else who wants to know....

The original post says "We got everything ready for delivery in about
one month.", so we would estimate in a little less than a month.

---------
Airspy.US
Your USA source for quality SDR products!
www.Airspy.US

NOTE! This email address is not routinely monitored.
If you have an issue, please contact us at airspy@airspy.us

On 5/29/2019 1:36 PM, n2msqrp wrote:

I submitted by order. When will the Airspy HF+ ship?

Looking forward to playing with this SDR.

Mike N2MS

*From:*main@airspy.groups.io [mailto:main@airspy.groups.io] *On Behalf Of *prog
*Sent:* Thursday, May 23, 2019 4:21 AM
*To:* main@airspy.groups.io
*Subject:* [airspy] Airspy HF+ Discovery pre-orders are open!

Dear Airspy fans,

Thank you for your patience and your encouragement during all these years! We are pleased to announce the availability of the *Airspy HF+ Discovery* on pre-order. We got everything ready for delivery in about one month.

How did we come to this? Do you remember the high performance HF Pre-selector project we started a few months ago? It was an opportunity for us to *Discover* the full potential of the Harmonic Rejection Mixer design when used in certain conditions. With the help of our partners *Itead Studio*, *ST Micro* and friends, most notably *Leif Asbrink SM5BSZ, *we could squeeze a new and improved front-end with a lot of pre-selectors along with a new firmware into a state of the art radio with unprecedented performance and form factor.

We created a coupon code for you, Airspy Fans, so you can get $50 off at Itead and Airspy.US when you pre-order this unit. The coupon is limited to 100 units at each reseller, then the regular price applies. First come, first served!

Coupon: *AIRSPY2019*

Worldwide:
https://www.itead.cc/airspy-hf-discovery.html *
*
US and Americas:
https://v3.airspy.us/product/airspy-hf-discovery

Full details:
https://airspy.com/airspy-hf-discovery/


We hope you will enjoy it!


<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

Sylvain Plunian
 

Hi

First message on this group.

I need for my job few synchronised SDR (2 to 49) to simulate receiver signal with lots of sources for Radionavigation aids. So we started a program on raspberry pi 3 for receive IQ samples from airspy, filtering, decimation and send IQ samples  to a server throw ethernet switch.
This server handles these datas to :

- offset USB delay
- offset LO phase difference
- offset amplitude difference

between a reference airspy R2 and others airspys. These offsets is measured by applying the same ON/OFF signal (carrier divided by two).

Once all airspys are synchronised, server can apply different phase and amplitude change for each source and then all IQ is added to send IQ sample for a receiver.

For now It is not finished but the work is in progress and results are great .

Example (it's amplitude sqrt(I²+Q²) ) without offset :


The same with usb delay offset (zero padding on IQ red signal):

I'll share code and wiki we made on github when  V1.0 will be ready.

Cheers

Sylvain
(Big sorry for my poor english)





Le 29/05/2019 à 16:27, Greg Ella a écrit :

If you can get by with just two coherent channels instead of four, there are some dual channel SDRs that have 2 coherent channels on one board, with one USB or Ethernet interface.  This eliminates the bus timing problem.
Look at the SDR Play RSP DUO, Lime SDR, and maybe BladeRF.

Greg Ella
N0EMP


On Wed, May 29, 2019 at 7:37 AM jdow <jdow@...> wrote:
If you want to do a LOT of software and thinking the noise suggestion is worth
examining. If you are post processing and receiving a PRN sequence on each
channel you can use the PRN sequence to phase correct for the drift from the
mis-phasing of the R820T2 frequency synthesizer. The PRN sequence gets you into
the ballpark. Then you can carrier track and observe the phase changes with time
and refer then mathematically back to the DTV channel you are trying to work on.
It won't be simple. It is at least theoretically possible. And on some machines
could probably be done today with the right USB card plugged into your computer.
Renasys, I think it is, makes (made) a nice quad USB3.0 card with 4 individual
controllers. They allow AirSpy's USB2.0 to work at its highest potential so you
can get the rather high speed sampling signals (up to 40 Megabytes per second.)
(I sincerely doubt that is possible with an RPI or other tiny tool. Your
bottleneck includes raw USB capabilities of the machine  you select. And a
machine with a lot of USB 3.0 slots off one controller will not do either. It
effectively becomes a USB 2.0 device once you are using all its time at the slow
USB 2.0 rates of the AirSpy.)

You MIGHT look into the LIME tools. But the same synthesizer issue will exist.
On the Gripping Hand that is probably solvable given the discussion above. It
all comes down to TANSTAAFL.

{^_^}

On 20190529 05:51:40, jon.scott9013@... wrote:
> Yikes - seems like every SDR rabbit hole I go down that seems to promise
> coherency is a dead end. Looks like Kerberos might be the only solution for
> those of us with this need and without the capability to perform significant
> modifications in the near future.
> Thank you!
> Jon
>




Re: Looking for a Signal Strength plug in for SDR#

 Chris Spacone
 

Paul,

 

I worked with Eddie over at https://sdrplugins.com/ and looks like something that is right up his alley. He already has an SNR meter in his tools plug in so perhaps some modifications can be done in his “abundant free time” (/s).

 

I envision his plugin could be slightly modified to record whatever signal strength parameter the API provides (RSSI, dB, raw ADC) and writes that sample to a user defined frequency / mode / date / time stamped text file at N seconds.

 

All user configurable options would be set at the SNR meter plugin by exposing the settings and controls via some kind of option box?

 

Eddy’s stuff is first rate, he understands how we want to use the radios and mostly is just a really nice human being to work with!

 

-Chris

 

From: main@airspy.groups.io <main@airspy.groups.io> On Behalf Of Paul Cianciolo
Sent: Wednesday, May 29, 2019 05:53
To: main@airspy.groups.io
Subject: [airspy] Looking for a Signal Strength plug in for SDR#

 

Hello Folks
Does anyone know if there is a signal strength logging program available  for SDR#?
Something like the "Signal History" window on the Console 3 program.

One of my interests is look at signal strength over time on various signals. For instance 24 KHZ VLF signals or HF shortwave signals, even VHF signals.
I think there are interesting phenomena that can be observed with a signal strength versus time graph.

Thank you
W1VLF


Re: Airspy HF+ Discovery pre-orders are open!

n2msqrp
 

I submitted by order. When will the Airspy HF+ ship?

 

Looking forward to playing with this SDR.

 

Mike N2MS

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of prog
Sent: Thursday, May 23, 2019 4:21 AM
To: main@airspy.groups.io
Subject: [airspy] Airspy HF+ Discovery pre-orders are open!

 

Dear Airspy fans,

Thank you for your patience and your encouragement during all these years! We are pleased to announce the availability of the Airspy HF+ Discovery on pre-order. We got everything ready for delivery in about one month.

How did we come to this? Do you remember the high performance HF Pre-selector project we started a few months ago? It was an opportunity for us to Discover the full potential of the Harmonic Rejection Mixer design when used in certain conditions. With the help of our partners Itead Studio, ST Micro and friends, most notably Leif Asbrink SM5BSZ, we could squeeze a new and improved front-end with a lot of pre-selectors along with a new firmware into a state of the art radio with unprecedented performance and form factor.

We created a coupon code for you, Airspy Fans, so you can get $50 off at Itead and Airspy.US when you pre-order this unit. The coupon is limited to 100 units at each reseller, then the regular price applies. First come, first served!

Coupon: AIRSPY2019

Worldwide:
https://www.itead.cc/airspy-hf-discovery.html

US and Americas:
https://v3.airspy.us/product/airspy-hf-discovery

Full details:
https://airspy.com/airspy-hf-discovery/


We hope you will enjoy it!


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

Greg Ella
 

If you can get by with just two coherent channels instead of four, there are some dual channel SDRs that have 2 coherent channels on one board, with one USB or Ethernet interface.  This eliminates the bus timing problem.
Look at the SDR Play RSP DUO, Lime SDR, and maybe BladeRF.

Greg Ella
N0EMP


On Wed, May 29, 2019 at 7:37 AM jdow <jdow@...> wrote:
If you want to do a LOT of software and thinking the noise suggestion is worth
examining. If you are post processing and receiving a PRN sequence on each
channel you can use the PRN sequence to phase correct for the drift from the
mis-phasing of the R820T2 frequency synthesizer. The PRN sequence gets you into
the ballpark. Then you can carrier track and observe the phase changes with time
and refer then mathematically back to the DTV channel you are trying to work on.
It won't be simple. It is at least theoretically possible. And on some machines
could probably be done today with the right USB card plugged into your computer.
Renasys, I think it is, makes (made) a nice quad USB3.0 card with 4 individual
controllers. They allow AirSpy's USB2.0 to work at its highest potential so you
can get the rather high speed sampling signals (up to 40 Megabytes per second.)
(I sincerely doubt that is possible with an RPI or other tiny tool. Your
bottleneck includes raw USB capabilities of the machine  you select. And a
machine with a lot of USB 3.0 slots off one controller will not do either. It
effectively becomes a USB 2.0 device once you are using all its time at the slow
USB 2.0 rates of the AirSpy.)

You MIGHT look into the LIME tools. But the same synthesizer issue will exist.
On the Gripping Hand that is probably solvable given the discussion above. It
all comes down to TANSTAAFL.

{^_^}

On 20190529 05:51:40, jon.scott9013@... wrote:
> Yikes - seems like every SDR rabbit hole I go down that seems to promise
> coherency is a dead end. Looks like Kerberos might be the only solution for
> those of us with this need and without the capability to perform significant
> modifications in the near future.
> Thank you!
> Jon
>




Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

jon.scott9013@...
 

Hi jdow,

Your responses are very helpful. Just one quick question - could you clarify what you mean by "Then you can carrier track and observe the phase changes with time and refer then mathematically back to the DTV channel you are trying to work on". Is this related to the phase correction for the USB and synthesizer phase errors?

- Jon


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

jdow
 

If you want to do a LOT of software and thinking the noise suggestion is worth examining. If you are post processing and receiving a PRN sequence on each channel you can use the PRN sequence to phase correct for the drift from the mis-phasing of the R820T2 frequency synthesizer. The PRN sequence gets you into the ballpark. Then you can carrier track and observe the phase changes with time and refer then mathematically back to the DTV channel you are trying to work on. It won't be simple. It is at least theoretically possible. And on some machines could probably be done today with the right USB card plugged into your computer. Renasys, I think it is, makes (made) a nice quad USB3.0 card with 4 individual controllers. They allow AirSpy's USB2.0 to work at its highest potential so you can get the rather high speed sampling signals (up to 40 Megabytes per second.) (I sincerely doubt that is possible with an RPI or other tiny tool. Your bottleneck includes raw USB capabilities of the machine you select. And a machine with a lot of USB 3.0 slots off one controller will not do either. It effectively becomes a USB 2.0 device once you are using all its time at the slow USB 2.0 rates of the AirSpy.)

You MIGHT look into the LIME tools. But the same synthesizer issue will exist. On the Gripping Hand that is probably solvable given the discussion above. It all comes down to TANSTAAFL.

{^_^}

On 20190529 05:51:40, jon.scott9013@gmail.com wrote:
Yikes - seems like every SDR rabbit hole I go down that seems to promise coherency is a dead end. Looks like Kerberos might be the only solution for those of us with this need and without the capability to perform significant modifications in the near future.
Thank you!
Jon


Looking for a Signal Strength plug in for SDR#

Paul Cianciolo
 

Hello Folks
Does anyone know if there is a signal strength logging program available  for SDR#?
Something like the "Signal History" window on the Console 3 program.

One of my interests is look at signal strength over time on various signals. For instance 24 KHZ VLF signals or HF shortwave signals, even VHF signals.
I think there are interesting phenomena that can be observed with a signal strength versus time graph.

Thank you
W1VLF


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

jon.scott9013@...
 

Yikes - seems like every SDR rabbit hole I go down that seems to promise coherency is a dead end. Looks like Kerberos might be the only solution for those of us with this need and without the capability to perform significant modifications in the near future.
 
Thank you!
Jon


Re: How to setup / make public the server #spyserver

Stephen Matthias
 

I tried 5556 port instead of 5555 port.  It didn't work with spyserver either.  So, I am going to have to accept being protected against port forwarding by Rogers Cable.  It's for my own good.

On Mon, May 27, 2019 at 6:57 AM prog <info@...> wrote:
On Mon, May 27, 2019 at 10:35 AM, Stephen Matthias wrote:
I believe that you used a rtl-promoted how-to website.  My spyserver, I think, is blocked by Rogers cable port-forwarding something or other.
Try a different port you know is OK with your provider.


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

jdow
 

Good luck with it. Without modifying the dongles to exactly synchronize the synthesizer dividers coherency isn't going to be done. There have been several discussions of this in regards to rtl dongles on rtl-sdr.com you might want to dig out. It's a little heartbreaking as it blocks several interesting things you could do such as automatic directional nulling antenna plus front end systems.

{^_^}

On 20190528 12:24:32, jon.scott9013@gmail.com wrote:
Hello,
I have a pretty ambitious project in mind that requires the use of a 4 channel coherent setup with 4 AirSpy R2's. I'm not aware that this has been done so far, but I'd be open to suggestions to other posts if it has.
I am trying to determine what will be needed for this to function properly. As I'm aware of right now:
1) A shared 10 MHz clock source for the 4 R2's to ensure phase coherence. I am planning on using the LeoBodnar GPSDO with an 8 channel distribution amplifier for this purpose.
2) Reliable data capture and processing. I am going to be looking at DTV signals, but I am not looking for real-time, listenable/watchable DTV (e.g. no demodulation). All I need is the raw RF data to be streamed to a computer for non-real time processing. I am not sure if a Raspberry PI 3B+ is sufficient with the R2's 10 Msps rate? May consider an Odroid XU4 if not, or any other recommendations?
Are there any potential pitfalls or issues that I am not considering? The antenna and LNA choices seem pretty straightforward. My real goal is to have 4 coherent receivers with minimal dropped samples of raw RF (e.g. IQ stream) data, which will be captured for a period of time, to be processed offline at a later point.
Thank you!
Jon


Re: AirSpy R2 - somewhat ambitious 4 channel coherent setup

Greg Ella
 

The USB outputs of the four separate radios will be out of step, even if the radios are all on one clock, because of the way USB data is buffered and sent.
This can be corrected in software by sending a signal, such as noise, in phase, to all 4 receivers at the same time and correcting the error.  Look at the Kerberos 4 channel coherent rtl-sdr project over on rtl-sdr.com.

Greg Ella
N0EMP


On Tue, May 28, 2019 at 1:30 PM <jon.scott9013@...> wrote:

Hello,

I have a pretty ambitious project in mind that requires the use of a 4 channel coherent setup with 4 AirSpy R2's. I'm not aware that this has been done so far, but I'd be open to suggestions to other posts if it has.

I am trying to determine what will be needed for this to function properly. As I'm aware of right now:

1) A shared 10 MHz clock source for the 4 R2's to ensure phase coherence. I am planning on using the LeoBodnar GPSDO with an 8 channel distribution amplifier for this purpose.
2) Reliable data capture and processing. I am going to be looking at DTV signals, but I am not looking for real-time, listenable/watchable DTV (e.g. no demodulation). All I need is the raw RF data to be streamed to a computer for non-real time processing. I am not sure if a Raspberry PI 3B+ is sufficient with the R2's 10 Msps rate? May consider an Odroid XU4 if not, or any other recommendations?

Are there any potential pitfalls or issues that I am not considering? The antenna and LNA choices seem pretty straightforward. My real goal is to have 4 coherent receivers with minimal dropped samples of raw RF (e.g. IQ stream) data, which will be captured for a period of time, to be processed offline at a later point.

Thank you!

Jon


AirSpy R2 - somewhat ambitious 4 channel coherent setup

jon.scott9013@...
 

Hello,

I have a pretty ambitious project in mind that requires the use of a 4 channel coherent setup with 4 AirSpy R2's. I'm not aware that this has been done so far, but I'd be open to suggestions to other posts if it has.

I am trying to determine what will be needed for this to function properly. As I'm aware of right now:

1) A shared 10 MHz clock source for the 4 R2's to ensure phase coherence. I am planning on using the LeoBodnar GPSDO with an 8 channel distribution amplifier for this purpose.
2) Reliable data capture and processing. I am going to be looking at DTV signals, but I am not looking for real-time, listenable/watchable DTV (e.g. no demodulation). All I need is the raw RF data to be streamed to a computer for non-real time processing. I am not sure if a Raspberry PI 3B+ is sufficient with the R2's 10 Msps rate? May consider an Odroid XU4 if not, or any other recommendations?

Are there any potential pitfalls or issues that I am not considering? The antenna and LNA choices seem pretty straightforward. My real goal is to have 4 coherent receivers with minimal dropped samples of raw RF (e.g. IQ stream) data, which will be captured for a period of time, to be processed offline at a later point.

Thank you!

Jon


Re: Airspy HF+ Discovery pre-orders are open!

prog
 

On Tue, May 28, 2019 at 09:19 PM, john ashe wrote:
I concur with Ron on this one.
Surely the 500 Million European population is a big enough market to
justify having a European distribution center?

John
Wimo and Moonraker are already on it. Wink Wink ;-)


Re: Airspy HF+ Discovery pre-orders are open!

john ashe
 

I concur with Ron on this one.
Surely the 500 Million European population is a big enough market to
justify having a European distribution center?

John


Re: Airspy HF+ Discovery pre-orders are open!

andrea ottaviani
 

Alberto non ci riesco.
Esce sempre questo errore:
Coupon code "AIRSPY2019" is not valid.

ho chiesto di cancellare il mio ordine

best 83 de IK0MMI
andrea
mmh@...


Re: How to setup / make public the server #spyserver

prog
 

On Mon, May 27, 2019 at 10:35 AM, Stephen Matthias wrote:
I believe that you used a rtl-promoted how-to website.  My spyserver, I think, is blocked by Rogers cable port-forwarding something or other.
Try a different port you know is OK with your provider.


Re: How to setup / make public the server #spyserver

Stephen Matthias
 

I believe that you used a rtl-promoted how-to website.  My spyserver, I think, is blocked by Rogers cable port-forwarding something or other.

On Mon, May 27, 2019 at 1:20 AM Tilman D. Thulesius <tilman@...> wrote:
I have two RX:es sitting on my spyserver ( RPi ). 
Interestingly enough I can only see the VHF-RX ( at RTL-SDR ) in the directory. 
My Airspy HF+ is not visible ??

Interestingly enough a have set up another Airspy HF+ for a good friend of mine ( also on a Rpi-server) . That is also not visible in the directory.

Comes without saying. Both are publicly visible in the Internet. 

sdr://spyserver.thulesius.se:5555/       My Airspy HF+

sdr://sm0otx.asuscomm.com:5555/       The Airpsy HF+ of my friend

How is the directory updated and where do i need to configure teh server the have it published ??
--
Regards :
Tilman D. Thulesius - SM0JZT
Sweden


Re: #spyserver Multiple receivers #spyserver

Tilman D. Thulesius <tilman@...>
 

I have done that with one RTL-SDR ( port 5556) for VHF and one Airspy HF+ (port 5555) for HF. 

Interestingly enough I can only see my RX with port 5556 published in the directory.  Both can be accessed publicly with port forwarding settings done. 
--
Regards :
Tilman D. Thulesius - SM0JZT
Sweden


Re: How to setup / make public the server #spyserver

Tilman D. Thulesius <tilman@...>
 

I have two RX:es sitting on my spyserver ( RPi ). 
Interestingly enough I can only see the VHF-RX ( at RTL-SDR ) in the directory. 
My Airspy HF+ is not visible ??

Interestingly enough a have set up another Airspy HF+ for a good friend of mine ( also on a Rpi-server) . That is also not visible in the directory.

Comes without saying. Both are publicly visible in the Internet. 

sdr://spyserver.thulesius.se:5555/       My Airspy HF+

sdr://sm0otx.asuscomm.com:5555/       The Airpsy HF+ of my friend

How is the directory updated and where do i need to configure teh server the have it published ??
--
Regards :
Tilman D. Thulesius - SM0JZT
Sweden

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