GQRX with direct I & Q input?
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Jim Reagan
Oct 30, 2019, 12:40:55 PM10/30/19
to Gqrx SDR
Hi,
Being fairly new to SDR, can GQRX be configured to take audio level I & Q signals into a Raspberry Pi?? Has anyone done that? I have a working quadrature receiver that has a Si5351 controlled by a separate (PIC) processor. It has I & Q outputs.
Thanks,
Jim W0CHL
Simon Kennedy
Oct 30, 2019, 4:01:45 PM10/30/19
to gq...@googlegroups.com
Hi Jim,
It cannot. Try using quisk but don't forget that the RPi does not have an audio input so you would need to used a separate USB sound interface.
Simon
G0FCU.
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Dave B
Oct 31, 2019, 4:40:38 AM10/31/19
to gq...@googlegroups.com
Well.
As GQRX works just fine with common RTL & FunCube Dongles and similar, also common SoftRock RX's etc, I'd say, "Yes it can use direct I/Q input" as that's what they all spit out for processing.
(It can even read a file of I/Q data, if needed.)
But, as Simon pointed out, you WILL (sorry) need an external USB
Sound input device that supports full stereo input to take the I/Q
feed from whatever front end / down-convertion device you have or
plan to use. As all the Pi's if anything, only support sound
Output as standard.
That's the easy thing, the fun starts when setting it up to use
such devices, it's not difficult, but read the documentation
first!
73.
Dave G0WBX.
On 31/10/2019 00:00,
gq...@googlegroups.com wrote:
Hi,
Being fairly new to SDR, can GQRX be configured to take audio level I & Q
signals into a Raspberry Pi?? Has anyone done that? I have a working
quadrature receiver that has a Si5351 ...more
Simon Kennedy <si...@thekennedys.info>: Oct 30 08:01PM
Hi Jim,
It cannot. Try using quisk but don't forget that the RPi does not have an
audio input so you would need to used a separate USB sound interface.
Simon
G0FCU.
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