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you can use datc in narrowband ... transmitted with a pluto and
received with a minituoner
125 kc bw or even 63 kc is possible ... with a lot of forward
error coding also usable for dx
and also used on qo100
Am 25.11.2021 um 01:43 schrieb Dale
I have been searching and watching for
quite a while myself to make use of my SDRplay RSPdx for
receiving analog (AM) NTSC TV. I tried using an older version
of SDR# as noted from a Google search that still supports using
ExtIO.dll along with the TV plugin from Russia (Basil Vasili)
but I get a runtime error saying the plugin is newer than the
SDR# program. Then on later SDR# the ExtIO is no longer
supported to get comm with the RSPdx receiver. I wish someone
would make a fix for this. The SDRplay folks apparently don't
want to provide support other than making an
ExtIO_SDRplay_RSPdx.dll available and I haven't seen much of any
plugin development for SDRuno.
Why support for analog TV? This mode is superior to
digital TV for long distances. Enhanced propagation modes allow
us to work several hundred miles on 70cm. We use commercial SAW
filters with a 10-position switch to reduce the receive
bandwidth to 352 kHz for video exchange only (we don't care
about audio or color subcarriers - this is strictly bw video
only using large black call letters to improve readability).
Hams in Europe also filter their transmitted signal to reduce
the bandwidth for dx and contesting.
I don't know of an automatic signal identification program.
There are web sites that provide numerous sample recordings of
various modes. For example http://www.w1hkj.com/FldigiHelp-3.21/Modes/
provides what it looks like on a waterfall,
spectrum and the sound.
73, Dale WB8CJW
On 11/24/2021 9:03 AM, Rich wrote:
Hope I can get an answer ... Does anyone have software that
can decode Over the air TV signals using SDRPLAY ? Seems like
there is software out there to decode almost any mode of signal
in the HF Band.
I don't mean Slow Scan ..> TV Also is there a
company that makes a program to analyze and ID what a signal
is ? Some of the signals I know are encrypted ... but if
you don't know what you are listening to ... it might as well