Date   

moderated Re: Itead have cancelled my order without warning or explanation

Keith
 

It was Order #100129560 and had been in status held since 10th November until today when it was changed to closed
and a refund issued.


Re: Baseband noise blanker and spyserver.

prog
 

On Sat, Nov 25, 2017 at 07:48 am, Святослав З wrote:
Hello!
Thank you for the wonderful implementation of the client and server for SDR!
There is one question:
When I connect the RTL-SDR directly to USB, the "Baseband noise blanker" action is directly reflected on the waterfall (the impulse noise disappears from the waterfall). But when I connect the RTL-SDR via Spyserver, the
"Baseband noise blanker" makes changes only for audio (by hearing the change is audible), but on the waterfall the impulse noise does not disappear.
What is the reason? It can be fixed? Version of spyserver 2.0.16.29, version of SDR # 1.0.0.1629
The wide band noise blanker (WB NB) works on the full bandwidth of the device. When not using "Full IQ", you are only sending a small fraction of that bandwidth along with the FFT display data. This means the WB NB has no chance to fix the signal with your current settings. Try "Full IQ".


moderated Re: Itead have cancelled my order without warning or explanation

prog
 

On Sun, Nov 26, 2017 at 11:59 pm, <responses@...> wrote:
Got up this morning to find an e-mail from itead to say my order for HF+ had been cancelled and a refund issued.
No explanation given, order was made on day of release.
Now I have to wait for the funds to get back to my bank account from paypal before I can think about a new order,
or maybe this has left a bad taste and I will use the funds on something else.
I was so excited about this product and looking forward to receiving it but feel totally deflated now.
Hope everyone here that ordered direct from itead has not suffered the same fate and I hope you all get a nice
Christmas present.
Paypal may cancel the transaction automatically if suspected of fraud. What is your order number?


moderated Re: Itead have cancelled my order without warning or explanation

Simon Brown
 

Ouch!

 

I’ve done that by mistake – cancelled someone’s order instead of accepting it – was early in the morning, before coffee. £150,000 order as well. Fortunately, a ‘phone call resolved the issue.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of responses@...
Sent: 27 November 2017 07:59
To: main@airspy.groups.io
Subject: [airspy] Itead have cancelled my order without warning or explanation

 

Got up this morning to find an e-mail from itead to say my order for HF+ had been cancelled and a refund issued.
No explanation given, order was made on day of release.
Now I have to wait for the funds to get back to my bank account from paypal before I can think about a new order,
or maybe this has left a bad taste and I will use the funds on something else.
I was so excited about this product and looking forward to receiving it but feel totally deflated now.
Hope everyone here that ordered direct from itead has not suffered the same fate and I hope you all get a nice
Christmas present.


moderated Re: Itead have cancelled my order without warning or explanation

jdow
 

I'm glad it was not one of those spams that got you. I worry too much and saw a possible problem you might have had.

I guess they sold more than the first production run or something. Hopefully there will be another before very long.

{^_^}

On 2017-11-27 00:17, responses@sycamore.me.uk wrote:
Yes I went direct to itead.cc site and logged in to check the order status, I have also gone direct to paypal
and logged in and the refund is listed in my account.


moderated Re: Itead have cancelled my order without warning or explanation

Keith
 

Yes I went direct to itead.cc site and logged in to check the order status, I have also gone direct to paypal
and logged in and the refund is listed in my account.


moderated Re: Itead have cancelled my order without warning or explanation

jdow
 

Are you sure it was from Itead? I ask because there is a spam pattern that insists that an order has been canceled and requests you to go visit a website or look at a pdf file. Both are ways to introduce malware into your computer system.

{o.o}

On 2017-11-26 23:59, responses@sycamore.me.uk wrote:
Got up this morning to find an e-mail from itead to say my order for HF+ had been cancelled and a refund issued.
No explanation given, order was made on day of release.
Now I have to wait for the funds to get back to my bank account from paypal before I can think about a new order,
or maybe this has left a bad taste and I will use the funds on something else.
I was so excited about this product and looking forward to receiving it but feel totally deflated now.
Hope everyone here that ordered direct from itead has not suffered the same fate and I hope you all get a nice
Christmas present.


moderated Itead have cancelled my order without warning or explanation

Keith
 

Got up this morning to find an e-mail from itead to say my order for HF+ had been cancelled and a refund issued.
No explanation given, order was made on day of release.
Now I have to wait for the funds to get back to my bank account from paypal before I can think about a new order,
or maybe this has left a bad taste and I will use the funds on something else.
I was so excited about this product and looking forward to receiving it but feel totally deflated now.
Hope everyone here that ordered direct from itead has not suffered the same fate and I hope you all get a nice
Christmas present.


Re: West coast of Scotland server back up

John
 

Another power outage.
Auto reboot failure.
Remote shack - will get to it on Friday.
Sadly, until the broadband uplink is improved, things are always going to be hit and miss.

John - tumbril.asuscomm.com
The Tumbril Server mission statement? - 'Reliably Unreliable'


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

n2msqrp
 

Where does find the previous versions of SDRSharp?


Mike N2MS

 

On November 25, 2017 at 6:33 AM Dick <hobbyd@...> wrote:

Look here:
 
 
Cheers,
Dick
 
From: Jon Fear
Sent: Saturday, November 25, 2017 12:23
To: main@airspy.groups.io
Subject: Re: [airspy] Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver
 

[Edited Message Follows]
[Reason: Add r1627 to clarify version needed...]

@Ken@WBØOCV

I managed to miss that final version r1627. I would like a copy please. I am not sure if we can do PM's on this board or whether you can put the file somewhere I can pick it up from. Until the HF+ arrives and without any support for the RSP1A, the dongle is the only game in town....

Best wishes

Jon in Weston super Mare, Clearly not far from Martin


 


Re: More Spyservers to play with. #spyserver

Martin - G8JNJ
 

Hi All,

Today I added a second RTL SDR V3 dongle in direct sampling mode and connected a very simple LF / HF diplexer filter.

sdr://g8jnj.zapto.org:5556 - RTL SDR V3 in direct sampling mode 0-14.4MHz (Spyserver 1624) using whatever antenna is currently selected on my KiWi WEB SDR http://southwest.ddns.net:8073/

sdr://g8jnj.zapto.org:5557 - RTL SDR V3 in direct sampling mode 14.4-30MHz (Spyserver 1624) using whatever antenna is currently selected on my KiWi WEB SDR http://southwest.ddns.net:8073/
 
sdr://g8jnj.zapto.org:5558 - Airspy R1 100-500MHz using VHF /UHF white stick colinear

There's quite a bit of activity on the various amateur bands today inluding 21MHz, but it really needs a more sophisticated diplexer to clean up the images a bit better.. I'll see what I can build over the next few days.

Regards,

Martin - G8JNJ


Baseband noise blanker and spyserver.

Святослав З <mtiklogs@...>
 

Hello!
Thank you for the wonderful implementation of the client and server for SDR!
There is one question:
When I connect the RTL-SDR directly to USB, the "Baseband noise blanker" action is directly reflected on the waterfall (the impulse noise disappears from the waterfall). But when I connect the RTL-SDR via Spyserver, the
"Baseband noise blanker" makes changes only for audio (by hearing the change is audible), but on the waterfall the impulse noise does not disappear.
What is the reason? It can be fixed? Version of spyserver 2.0.16.29, version of SDR # 1.0.0.1629


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

Dick
 

Look here:
 
 
Cheers,
Dick
 

From: Jon Fear
Sent: Saturday, November 25, 2017 12:23
To: main@airspy.groups.io
Subject: Re: [airspy] Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver
 

[Edited Message Follows]
[Reason: Add r1627 to clarify version needed...]

@Ken@WBØOCV

I managed to miss that final version r1627. I would like a copy please. I am not sure if we can do PM's on this board or whether you can put the file somewhere I can pick it up from. Until the HF+ arrives and without any support for the RSP1A, the dongle is the only game in town....

Best wishes

Jon in Weston super Mare, Clearly not far from Martin


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

Jon Fear
 
Edited

@Ken@WBØOCV

I managed to miss that final version r1627. I would like a copy please. I am not sure if we can do PM's on this board or whether you can put the file somewhere I can pick it up from. Until the HF+ arrives and without any support for the RSP1A, the dongle is the only game in town....

Best wishes

Jon in Weston super Mare, Clearly not far from Martin 


Re: West coast of Scotland server back up

claudio36itus
 

Hi John 

just back from my holidays, I tried again your server but it seems not connected...
Are you still facing issues ? 

Thanks

73

Claudio ( Glasgow) 
 


Re: More Spyservers to play with. #spyserver

Martin - G8JNJ
 

Hi All,

I notice that (not surprisingly) my HF spyserver is suffering a this evening from the very strong shortwave broadcast stations we  experience in Europe. An SDR Play RSP1 I once had didn't like the strong signals either, so the dongle is holding up quite well in comparison.

Tomorrow as a further experiment I'll split the signal into two separate bands (at around 14.4MHz) and run it across two Spyservers.

Regards,

Martin - G8JNJ


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

Kenneth Sejkora
 

Based on the revision log, it looks as though build 1627 was the last version of SDRSharp available before the 14.4 MHz ceiling was implemented in direct sampling mode.  As Martin points out, there are situations where it might be advantageous to at least have the option to run a dongle in direct sampling mode in the 14.4 to 28.8 MHz range as opposed to being forced to use quadrature sampling in this frequency range.  I totally respect Youssef's desire to implement the 14.4 MHz ceiling for the technical reasons he stated, but for an end user the option to exceed the ceiling should also be respected and left up to the user.  The user can 'assume' the negative consequences of operating direct sampling in the 14.4 to 28.8 MHz frequency range. However, at least for now, SDRSharp is freeware and Youssef has every right to call the shots.

Although it circumvents any improvements that might be afforded by new revisions to SDRSharp, it might behoove anyone that wants the option of using direct sampling in the 14.4 to 28.8 MHz range to obtain a copy of build 1627 to at least have the option of using that range of frequencies in either direct sampling or quadrature mode.  Not the best "fix", but a workable one.  Fortunately, I still have the Zip file for build 1627, and can maintain that version as a separate installation for whenever I need to use direct sampling above 14.4 MHz.

Ken, WBØOCV Norton, MA USA
41.959546N, 71.163996W  FN41kx



From: Martin via Groups.Io <martin_ehrenfried@...>
To: main@airspy.groups.io
Sent: Friday, November 24, 2017 9:36 AM
Subject: Re: [airspy] Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

Hi Joanne,

Yesterday I tried to setup three concurrent FT8 decode sessions on 24MHz in order to test the receive performance of an Airspy R1, generic 820T2 dongle and RTL SDR V3 in direct sampling mode.

Unfortunately the propagation gods were not favourable and I discovered a few other issues, so today I connected them up to my tes tkit to try and figure out what was going on.

First the maximum sensitivity I could obtain for each type. These were measured using plain carrier and USB in a 2400KHz BW. The generator output was adjusted to obtain 10dB SINAD at 27MHz. Note my generator and attenuators may not be fully in calibration, but I used the same setup for each test, so I'm comparing like with like.

Airspy R1 = -122dBm (Gain setting in free mode 10/10/15)

Airspy Mini = -117dBm (Gain setting in free mode 10/10/15)

Generic 820T2 = -119dBm (Gain setting 49.6)

RTL SDR V3 Quadrature = -118dBm (Gain setting 49.6)

RTL SDR V3 Direct Sampling = -107 (No gain adjustment)

So in theory the Quadrature mode seems to offer about 10dB better sensitivity than when used in Direct Sampling mode.

However when I connected an antenna to the various SDR's using the maximum gain settings they all showed signs of overload and IMD products, apart from the V3 in Direct Sampling mode.

In each case I adjusted the gain settings until the overload and IMD products just disappeared and then remeasured the sensitivity with the new gain settings.

Airspy R1 = -116dBm (Gain setting in free mode 10/10/6)

Airspy Mini = -115dBm (Gain setting in free mode 10/10/9)

Generic 820T2 = -112dBm (Gain setting 29.7)

RTL SDR V3 Quadrature = -111dBm (Gain setting 29.7)

RTL SDR V3 Direct Sampling = -107 (No gain adjustment)

So now the difference is only 8dB best case (Airspy Mini) and is typically only 4dB (Generic 820T2 and RTL SDR V3)

In practice these figures could be improved by placing bandpass filters ahead of the SDR's but I just wanted to test their basic out of the box performance.

Other observations:-

All the dongle sensitivities remained fairly consistent across their frequency ranges.

When using Quadrature mode non of the dongles locked consistently below 24MHz. The 820T2  would not go below 24MHz, the Airspy R1 occasionally manged it down to 19MHz and the Airspy Mini would normally only lock down to about 25MHz. I could sometimes see a signal but it was not on the correct frequency (usually 1-1.5MHz low) So if you have it connected to an antenna you may think you are seeing signals below 24MHz, but they may not be on the correct frequency.

There is no mechanism to receive signals between 14.4MHz and 24MHz using Quadrature mode. Direct Sampling does work up to about 27MHz but above this frequency the 28.8MHz clock oscillator causes very high level unwanted noise spikes.

When using the RTL SDR V3 in Direct Sampling mode the sensitivity is typically -107dBm from 2MHz to 25MHz. It falls outside these limits as the Bias tee inductor and input diplexer add additional losses. This permits good reception on most bands up to about 20MHz (with a suitable antenna) and is only limited by the natural atmospheric noise floor. Reception is still adequate on higher frequencies up to about 27MHz, especially in urban areas where the noise floor is likely to be higher.

The RTL SDR V3 in Direct Sampling mode does have Nyquist Alias signals wrapped around 14.4MHz (1/2 of 28.8MHz sample rate). This results in signals appearing twice (one the correct frequency and one unwanted on the Nyquist image). Most of these can be removed by adding a simple high / low / Diplexing filter or if only certain frequency ranges are of interest a band pass filter.

This is why like to have the option of being able to use the Direct Sampling mode between 14.4MHz and 27MHz.

Regards,

Martin - G8JNJ



More Spyservers to play with. #spyserver

Martin - G8JNJ
 
Edited

Hi All,

A couple from me for you to play with until I re-purpose the hardware.

sdr://g8jnj.zapto.org:5557 - RTL SDR V3 in direct sampling mode 0-28MHz (Spyserver 1624) using whatever antenna is currently selected on my KiWi WEB SDR http://southwest.ddns.net:8073/

sdr://g8jnj.zapto.org:5558 - Airspy R1 100-500MHz using VHF /UHF white stick colinear

Located up a hill in the West Country of the UK - 50km South of Bristol



Regards,

Martin - G8JNJ


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

Martin - G8JNJ
 

On Fri, Nov 24, 2017 at 08:31 am, David J Taylor wrote:
Thanks for your report, Martin. For the reasons you state, I guess you will already have an Airspy HF+ on order!
Ha maybe :-)

Although I'm quite happy with my KiWi SDR's, so perhaps not just yet, I like to let designs settle down a bit first and the early adopters to be the Beta testers for me....

The particular application I had in mind for the cheap dongles requires something to be as low cost as possible, almost a throw away item. It only needs to be good enough for the purpose.

Judging from the woeful performance of many existing WEB SDR's etc. I suspect that only a few folks will have a good enough antenna system and low enough noise floor to be able to take full advantage of the sensitivity and dynamic range of the HF+. 

In many cases these days an 'average' performance receiver is probably good enough. Although that still shouldn't stop us striving for the best performance possible to deal with 'edge cases'

Regards,

Martin - G8JNJ


Re: Direct Sampling frequency limit in r 1628 onwards #sdrsharp #spyserver

David J Taylor
 

Hi Joanne,
[]
This is why like to have the option of being able to use the Direct Sampling mode between 14.4MHz and 27MHz.

Regards,
Martin - G8JNJ
=====================================

Thanks for your report, Martin. For the reasons you state, I guess you will already have an Airspy HF+ on order!

73,
David GM8ARV
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv

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