Date   

Multiple TM-2 Controllers

Francesco Di Giovanni
 

Hi,
is it possible to run more than oneTM-2 controller?

73
Francesco, IN3XZP


Re: SDR operated with a noise source

Alan G4ZFQ
 

I tried lots of settings, visual gain and receiver gain, bandwidth etc but
the meter consistently read 6dB or more too high Allan
Does this not help?

https://www.sdr-radio.com/s-meter

73 Alan G4ZFQ


Re: SDR operated with a noise source

Allan Isaacs
 

Hi Willi
I tried lots of settings, visual gain and receiver gain, bandwidth etc but
the meter consistently read 6dB or more too high compared with the trace..
I then set the receiver to 500KHz scan with AM bandwidth to 2Hz and the
meter read correctly. Switching to AM 20KHz and it read 10dB too high.
I guess the meter is only good for comparative readings on a proper signal
but on noise you need to look at the trace and read off the vertical
scales..
If there was a trimmer so that you could tweak the meter to read the same as
the trace it would be nice, but I'm only experimenting with a noise source
to take the place of a tracking generator..
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Willi Passmann
Sent: 14 January 2021 13:38
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SDR operated with a noise source

Allan,
As I understand it, values would be equal only if you could select the
same bandwidth for the spectrum range and the demodulation range. But
you can try and tell us what you find out :-)

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:47 schrieb Allan Isaacs:
That does seem to make sense Willi.
If I measure the noise source with a wideband power meter it tells me it
is
0dBm so the noise within the selected bandwidth of the SDR at 190KHz is
summed over the 3.5KHz setting of the selected AM mode.. Presumably, all
things being equal, if I selected CW 50Hz the meter reading would be
closer
to that shown in the display?
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Willi Passmann
Sent: 14 January 2021 12:35
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SDR operated with a noise source

Allan, the different readings probably are related to different
bandwidths. 190 kHz for the spectrum and waterfall display, but maybe 3
kHz (or whatever you selected) for the demodulated signal that the S
meter reflects.

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:25 schrieb Allan Isaacs:
The noise signal looks like -116dBm at 190KHz and the meter shows
-109.7dBm.







Re: SDR operated with a noise source

Willi Passmann
 

Allan,
As I understand it, values would be equal only if you could select the
same bandwidth for the spectrum range and the demodulation range. But
you can try and tell us what you find out :-)

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:47 schrieb Allan Isaacs:

That does seem to make sense Willi.
If I measure the noise source with a wideband power meter it tells me it is
0dBm so the noise within the selected bandwidth of the SDR at 190KHz is
summed over the 3.5KHz setting of the selected AM mode.. Presumably, all
things being equal, if I selected CW 50Hz the meter reading would be closer
to that shown in the display?
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Willi Passmann
Sent: 14 January 2021 12:35
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SDR operated with a noise source

Allan, the different readings probably are related to different
bandwidths. 190 kHz for the spectrum and waterfall display, but maybe 3
kHz (or whatever you selected) for the demodulated signal that the S
meter reflects.

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:25 schrieb Allan Isaacs:
The noise signal looks like -116dBm at 190KHz and the meter shows
-109.7dBm.






Re: RX-888 windows driver

jdow
 

That will be an interesting challenge for  USB3, 2 Gbps.

{^_^}

On 20210114 03:46:03, Alan G4ZFQ wrote:
that’s what attracts me to the RX888
i note the LTC2208 samples at 125MHz in the QS1R giving a spectrum of ~ 62 MHz

Paul,

I think they are working on 60MHz span for the next creation.
You really need to look at Oscar's site to see what is happening.
(I suspect Simon knows.)
https://sdr-prototypes.blogspot.com/

73 Alan G4ZFQ






Re: SDR operated with a noise source

Allan Isaacs
 

That does seem to make sense Willi.
If I measure the noise source with a wideband power meter it tells me it is
0dBm so the noise within the selected bandwidth of the SDR at 190KHz is
summed over the 3.5KHz setting of the selected AM mode.. Presumably, all
things being equal, if I selected CW 50Hz the meter reading would be closer
to that shown in the display?
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Willi Passmann
Sent: 14 January 2021 12:35
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] SDR operated with a noise source

Allan, the different readings probably are related to different
bandwidths. 190 kHz for the spectrum and waterfall display, but maybe 3
kHz (or whatever you selected) for the demodulated signal that the S
meter reflects.

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:25 schrieb Allan Isaacs:
The noise signal looks like -116dBm at 190KHz and the meter shows
-109.7dBm.


Re: RX-888 windows driver

N8CVW
 

Alan,

kind thanks for the link !

On Jan 14, 2021, at 6:46 AM, Alan G4ZFQ <alan4alan@gmail.com> wrote:



that’s what attracts me to the RX888
i note the LTC2208 samples at 125MHz in the QS1R giving a spectrum of ~ 62 MHz
Paul,

I think they are working on 60MHz span for the next creation.
You really need to look at Oscar's site to see what is happening.
(I suspect Simon knows.)
https://sdr-prototypes.blogspot.com/

73 Alan G4ZFQ





Re: SDR operated with a noise source

Willi Passmann
 

Allan, the different readings probably are related to different
bandwidths. 190 kHz for the spectrum and waterfall display, but maybe 3
kHz (or whatever you selected) for the demodulated signal that the S
meter reflects.

vy 73,
Willi, DJ6JZ

Am 14.01.2021 um 13:25 schrieb Allan Isaacs:

The noise signal looks like -116dBm at 190KHz and the meter shows
-109.7dBm.


SDR operated with a noise source

Allan Isaacs
 

I notice my SDR-Play when fed with a home brew noise source gives signal strength readings that do not match the display.
Generally the meter indicates some 6 to 10dBm higher than the display. This also is the case with the noise source switched off and just baseline background noise.
With the noise source switched off the baseline noise may be at -125dBm but the meter indicates -119dBm. Typically, attached is a picture of the noise source used with a low pass filter. The noise signal looks like -116dBm at 190KHz and the meter shows -109.7dBm.
Is this explainable?
Allan G3PIY


Re: RX-888 windows driver

Alan G4ZFQ
 

that’s what attracts me to the RX888
i note the LTC2208 samples at 125MHz in the QS1R giving a spectrum of ~ 62 MHz
Paul,

I think they are working on 60MHz span for the next creation.
You really need to look at Oscar's site to see what is happening.
(I suspect Simon knows.)
https://sdr-prototypes.blogspot.com/

73 Alan G4ZFQ


Re: RX-888 windows driver

N8CVW
 

Bert,

that’s what attracts me to the RX888

i note the LTC2208 samples at 125MHz in the QS1R giving a spectrum of ~ 62 MHz

I’m guessing the reason the RX888 is limited to 32MHz is lack of hardware DDC (?)

thanks for commenting !

Paul
N8CVW

On Jan 14, 2021, at 5:13 AM, Bert Vierhout <bert.vierhout@...> wrote:


The RX888 has very big bandwith. In my opinion is that the only plus above the airspy hf+ discovery. 

Bert



Verzonden vanaf mijn Galaxy


-------- Oorspronkelijk bericht --------
Van: N8CVW <n8cvw.gbmi@...>
Datum: 14-01-2021 09:42 (GMT+01:00)
Aan: main@sdr-radio.groups.io
Onderwerp: Re: [SDR-Radio] RX-888 windows driver

Hi All,

Does anyone know the MDS of RX-888, and whether performance is favorable to the Airspy HF+ ?

kind thanks 

Paul
N8CVW

On Jan 14, 2021, at 1:21 AM, Simon Brown <simon@...> wrote:



Hi,

 

It’s really up to you, select from:

 

  • HDSDR,
  • An older version of SDR# (build 1740 I think),
  • SDR Console.

 

Regarding SDR Console – support in 3.0.27 will be a lot better, I may release 3.0.27 on Monday after more testing.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Francois Michaud-Herbst via groups.io
Sent: 14 January 2021 03:20
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RX-888 windows driver

 

I ordered a RX-888 and what to know what is the best software to use it especialy in HF
Thanks
Francois


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: RX-888 windows driver

Bert Vierhout <bert.vierhout@...>
 

The RX888 has very big bandwith. In my opinion is that the only plus above the airspy hf+ discovery. 

Bert



Verzonden vanaf mijn Galaxy


-------- Oorspronkelijk bericht --------
Van: N8CVW <n8cvw.gbmi@...>
Datum: 14-01-2021 09:42 (GMT+01:00)
Aan: main@sdr-radio.groups.io
Onderwerp: Re: [SDR-Radio] RX-888 windows driver

Hi All,

Does anyone know the MDS of RX-888, and whether performance is favorable to the Airspy HF+ ?

kind thanks 

Paul
N8CVW

On Jan 14, 2021, at 1:21 AM, Simon Brown <simon@...> wrote:



Hi,

 

It’s really up to you, select from:

 

  • HDSDR,
  • An older version of SDR# (build 1740 I think),
  • SDR Console.

 

Regarding SDR Console – support in 3.0.27 will be a lot better, I may release 3.0.27 on Monday after more testing.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Francois Michaud-Herbst via groups.io
Sent: 14 January 2021 03:20
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RX-888 windows driver

 

I ordered a RX-888 and what to know what is the best software to use it especialy in HF
Thanks
Francois


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: RX-888 windows driver

N8CVW
 

Hi All,

Does anyone know the MDS of RX-888, and whether performance is favorable to the Airspy HF+ ?

kind thanks 

Paul
N8CVW

On Jan 14, 2021, at 1:21 AM, Simon Brown <simon@...> wrote:



Hi,

 

It’s really up to you, select from:

 

  • HDSDR,
  • An older version of SDR# (build 1740 I think),
  • SDR Console.

 

Regarding SDR Console – support in 3.0.27 will be a lot better, I may release 3.0.27 on Monday after more testing.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Francois Michaud-Herbst via groups.io
Sent: 14 January 2021 03:20
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RX-888 windows driver

 

I ordered a RX-888 and what to know what is the best software to use it especialy in HF
Thanks
Francois


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: RX-888 windows driver

Simon Brown
 

Hi,

 

It’s really up to you, select from:

 

  • HDSDR,
  • An older version of SDR# (build 1740 I think),
  • SDR Console.

 

Regarding SDR Console – support in 3.0.27 will be a lot better, I may release 3.0.27 on Monday after more testing.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Francois Michaud-Herbst via groups.io
Sent: 14 January 2021 03:20
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RX-888 windows driver

 

I ordered a RX-888 and what to know what is the best software to use it especialy in HF
Thanks
Francois


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: RX-888 windows driver

Francois Michaud-Herbst
 

I ordered a RX-888 and what to know what is the best software to use it especialy in HF
Thanks
Francois


Re: Airspy R2 and RX888

Simon Brown
 

Bob,

No. My local noise is very low.

Simon Brown, G4ELI
https://www.sdr-radio.com

-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Bob
Dengler
Sent: 14 January 2021 00:13
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Airspy R2 and RX888

At 1/13/2021 03:29 AM, you wrote:

Paul,

Â

The RX888 is very respectable on HF and VHF.
Simon:

Did you ever measure the noise figure or 12 dB SINAD sensitivity of your
RX-888 at VHF & UHF? Mine is poor, but this may not show up when RXing the
FM broadcast band as the noise floor at lower VHF frequencies is rather
high.

Bob NO6B










--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: External Radio / Omnirig has become unstable.

HERB KEATON N2GEW
 

Fred:
This was nice and thank you very much.
I am on an older version of Omni-Rig (1.16) and 
the radio (TS-990S) did not have an .ini file in the 
database. And neither is HRD an available Rig type setting.
I assume it was added as an update.

I have an .ini file for the TS-990S written by another user
and it has worked well for some years.

Does anyone know if I update to the latest version on Omni-Rig
and also the newest .ini files (I want to get HRD as a Rig type), do I need to uninstall
my current versions or will the installs update / overwrite?
With SDRC, no need to uninstall for updates (as Simon told me
some time ago). But with Omni-Rig: does anyone know?
Herb 
N2GEW


Re: Airspy R2 and RX888

Bob Dengler
 

At 1/13/2021 03:29 AM, you wrote:

Paul,

Â

The RX888 is very respectable on HF and VHF.
Simon:

Did you ever measure the noise figure or 12 dB SINAD sensitivity of your RX-888 at VHF & UHF? Mine is poor, but this may not show up when RXing the FM broadcast band as the noise floor at lower VHF frequencies is rather high.

Bob NO6B


Re: External Radio / Omnirig has become unstable.

Fred
 

Here's a link of my trouble  https://sdr-radio.groups.io/g/main/topic/67985999#52212

And here's my settings I am using the 7610 so you don't need those.
     

Probably not to much help.
But look at the settings for HRD and Omni Rig.
I had problems like yours and it com port conflicts.

I had a time of it to but it did finally work.
Good Luck
Fred KB4QZH


Re: Airspy R2 and RX888

Simon Brown
 

BTW,

 

The RX999 may well be a quite amazing beast.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Paul
Sent: 13 January 2021 20:32
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Airspy R2 and RX888

 

Well I'm sold on the idea but will hold off for the moment because I've heard from Justin on Twitter who says the MK2 is on the way and there will be more public information soon.

A couple of weeks ago he suggested there was something in the pipeline when asked about replacing the R820T with a downconverter to shift B2 on to the HF tuner but whatever the final spec turns out to be I'll be getting one.

Paul


--
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