Hi Dave, Wolfgang !
You are right, 12 Bit is the "native" resolution, but not the
"effective" resolution, as is written on the main page of sdrplay.com :
Technical Specifications:
Frequency range:
Total coverage from 0.1MHz to 2GHz
ADC performance: 12 bit native ADC
Sample Freq: 2MSPS – 10.66MSPS
10.4 ENOB
60dB SNR
67dB SFDR
It took me some time to find out what the abbreviation "ENOB" meant.
A datasheet of the chip is available at :
http://www.mirics.com/node/4
Ohh, and sorri, it is 10.4 Bits and not just 10.
73 de dg3lv Tobias
Am 30.05.2016 um 21:23 schrieb Wolfgang Büscher:
Hello Tobias, Dave, and the group,
Great, thanks Tobias - in that case, Dave doesn't need to fool around
with virtual audio cables etc.
After installing the ExtIO-interface, you can select ("install") it as
an input device for Spectrum Lab as explained here:
http://www.qsl.net/dl4yhf/speclab/settings.htm#ext_io_dll
About the A/D converters resolution: Ummm... I thought it was 12 bits.
If it's 10 bits, even a cheap DSPic with a bit of decimation could
achieve a similar dynamic range. Maybe time for me to continue with that
project.. too many other things got in the way lately..
All the best,
Wolf .
Am 30.05.2016 um 21:08 schrieb Tobias DG3LV:
Hi Dave, Wolfgang !
Please have a look at this website :
http://www.sdrplay.com/windows.html
http://www.sdrplay.com/software/SDRplay_EXTIO_Installer_v3.8.3.exe
The Chip-manufacturer claims 10 Bit resolution ENOB (effective number
of bits), so the device should be somewhat better than the usual DVB-T
sticks at 8 Bits (at more than 10 times the price of those).
73 de dg3lv Tobias
Am 30.05.2016 um 20:47 schrieb Wolfgang Büscher:
Hello Dave,
By coincidence, one of the developers of SDR-play recently asked me if
I'd like to have one of these devices to add support for it. Since I
cannot devote lots of time for it, my suggestion was that one of the
SDR-play developers should write an ExtIO-compatible interface DLL for
it. Most if not all SDR programs support it, for example Winrad, HDSDR,
Spectrum Lab, and possibly many others, so writing such a DLL would make
their radio more useful to many users.
I don't know what happened since then, but maybe there is a
Winrad-compatible "ExtIO"-DLL available already, which you can easily
load in Spectrum Lab as driver for an 'input device'. Just let me know
if you need more information.
It would be interesting to know how the SDR-play compares with other
(more expensive) SDRs. Maybe I will carry one home from the Ham Radio
fair in Friedrichshafen this year...
All the best,
Wolf .
Am 30.05.2016 um 17:09 schrieb DAVE PICK:
Dear LF
I have a new toy which I've finished playing with and I want to use it
for some useful purpose. It's an "SDR-Play" USB SDR.
What I'd like to be able to use it for is to replace my old Soft-Rock
SDRs for my LF and MF grabbers.
I can get it to view a slice of the spectrum 500 or 600kHz wide from,
say 50 to 550kHz, then I want to be able to run two instances of
Spectrum Lab (or Argo?) to take grabs of the 136 and 472kHz bands.
But, how do I configure spectrum Lab (or another program) to be able
to do this? I feel awfully out of my depth when I read anything about
setting this sort of thing up so any help in plain language would be
appreciated!
I realise I'll have to pay great attention to the front-end filtering
in order to make the most of the limited resolution of the A/D but
that sort of stuff I can cope with!
73
Dave G3YXM
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