Re: Looking for SDR idea suggestions.
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SDR receivers convert an entire block of spectrum into live streaming I/Q data
that can be processed in real time. That's why we get the nice real time
spectrum display, and why we can record an entire band to hard drive and
"tune around" inside of it after the fact.
Most modern SDR receivers can cover over 4 MHz of simultaneous bandwidth, which would cover the
entire span of any of our Amateur bands until we get up to 70 CM. Even there, I think that the band plan for
specific uses, live FM Simplex or Repeater Output, is less than 4 MHz wide. If not, there are some
receivers, like BladeRF, that can cover 30 MHz or more of bandwidth.
Given the above, it seems to me that your approach, scanning across frequencies one at a time with a defined step size,
would be a step backwards. Think of older spectrum analyzers that used swept tuning, vs modern RTSA analyzers.
I think that what would be useful here is an application that lets you set a frequency range (within the maximum bandwidth
of the receiver), the trigger level, and the demodulation mode. The software would detect any signal that pops up above the detection level,
snap to it, and pipe out demodulated audio. As a bonus, it could trigger recording to an audio file, and the recording would be time, date and frequency
Does anybody know if such an application exists yet?
On Sun, Nov 28, 2021 at 7:07 AM KD7JYK DM09 <kd7jyk@...> wrote:
I've looked online on and off for a year or two, and haven't found an