I want to know what internally does NBFMmodulationblock,
How I can build that function with separated blocks??
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You could look at the so
I'm having a bit of trouble getting this one to work...
I'm running the input through a microtune 4937 frontend, so that the IF
is 5.75e6. I've changed Matt's nbfm script just to adjust this IF_freq.
Is there anything else that needs to be done? I'm trying to tune to a
known station, the weather
On Fri, Feb 18, 2005 at 05:42:03AM -, Robert McGwier wrote:
> In a really good NBFM receiver, where you are attempting to use it
> for voice communications, and hand helds are involved (say), it is
> important to have threshold effect improvement. This will improve
> intelligibility on import
On Thursday 17 February 2005 07:32 pm, Marcus D. Leech wrote:
> In the analog world, do they implement squelch using
> detected RF power levels (i.e. prior to FM demod), or
> something else?
It is usually done by measuring detected noise. Recall, in FM,
audio output level is independent of t
In a really good NBFM receiver, where you are attempting to use it
for voice communications, and hand helds are involved (say), it is
important to have threshold effect improvement. This will improve
intelligibility on important links such as official/government
communications. This is done by u
At 11:54 AM 2/17/2005 -0800, you wrote:
I realized about an hour before a demo last night that we didn't have
narrowband
FM (like ham and public safety), so I coded it up. Its in the
gnuradio-examples package, and it is commented rather liberally.
It will require an update on the gr-wxgui stuff
Johnathan Corgan wrote:
>
> Marcus D. Leech wrote:
>
> > I'm jealous that I wasn't there (wherever *there* was :-) ).
>
> This was a USRP demonstration at the West Valley Amateur Radio
> Association in San Jose, CA. Excellent job by Matt...I think you will
> get a few orders, too.
>
> -Johnath
Marcus Leech asked:
>In the analog world, do they implement squelch using
> detected RF power levels (i.e. prior to FM demod), or
> something else?
I think early receivers used an AGC level. Modern receivers use the noise:
once the high frequency (above the expected voice bandwidth) content
Johnathan Corgan wrote:
>
> Matt Ettus wrote:
>
> > I realized about an hour before a demo last night that we didn't have
> > narrowband
> > FM (like ham and public safety), so I coded it up. Its in the
> > gnuradio-examples package, and it is commented rather liberally.
>
> As an attendee at
Marcus D. Leech wrote:
I'm jealous that I wasn't there (wherever *there* was :-) ).
This was a USRP demonstration at the West Valley Amateur Radio
Association in San Jose, CA. Excellent job by Matt...I think you will
get a few orders, too.
-Johnathan, AE6HO
_
Matt Ettus wrote:
I realized about an hour before a demo last night that we didn't have narrowband
FM (like ham and public safety), so I coded it up. Its in the
gnuradio-examples package, and it is commented rather liberally.
As an attendee at the demo last night, this was a pretty slick way of
s
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