MiricsFlexiTV-MSI3101

Leif Asbrink leif at sm5bsz.com
Wed Nov 20 22:24:45 UTC 2013


Hi All,

I have a USB dongle with a Mirics tuner which I have tried
to get running with libmirisdr. 

It seems the library is not complete and that it does
not configure the chip correctly.

I can set a sampling rate and the get sampling rate returns 
the value that I have set, but the routine to actually
set the rate is missing. The sampling rate always becomes
9.142 MHz.

As a test I have set the frequency to 500 MHz. The received 
frequencies are in the range 488.4 to 496.3 MHz. Something is very
wrong with the data. If I inject a signal on 490.0 MHz I see
four equally strong signals on 496.6, 498.8, 501.2 and 503.4.
When the signal is moved towards the center frequency 492.35 MHz,
the 498.8 and 501.2 signals move towards the center while the 
other two signals move towards the passband ends.

When looking at the narrowband spectrum of one signal I can see
it is actually several equispaced carriers.

I have been told that the driver here works:
http://blog.palosaari.fi/2013/08/mirics-msi3101-sdr-linux-driver.html
Unfortunately I am not much of a programmer, I can not understand how
to use the info:
http://git.linuxtv.org/anttip/media_tree.git/shortlog/refs/heads/mirics

libmirisdr is easy to understand. Very similar to rtlsdr.
It would be very interesting to be able to use this dongle
and to check what performance one might get from it.

Regards

Leif



On Wed, 12 Jun 2013 20:58:22 +0200
marzano <Francesco.Marzano at roma1.infn.it> wrote:

> A quite good  (AM/SW)/FM/DAB/DVB-T  USB dongle.
> Mirics FlexiTV MSi3101 (two chips  MSi001+MSi2500)
> http://www.mirics.com
> http://www.mirics.com/node/31
> Data sheets available, register yourself at Mirics portal.
> RF Tuner: MSi001/MSi002 ( used by FUNcubrePro+  ?), seems better than R820T
> ADC and HiSpeed USB interface: MSi2500 .  ADC 10 bit , better than
>          8 bit RTL2832U aDC.
> Windows binary software available: FMDABplayer, DVB_T decoder,
>                  Windows lib.dll and API doc.
> 
> IO-DATA GV-TV100 stick sold on Japan .
> Stick, chips and dev board available from Mirics.
> 
> Linux software at address
> http://cgit.osmocom.org/libmirisdr/
> It seems project on stand-by .
> Can author Steve Markgraf comment  ?
> 
> Francesco
> 




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