[Premium-Rx] Is there a portable radio with ISB detection?

[Clemens Paul]

Hello Peter,

>That makes me wonder if audio is muted in
> mode SyncSB if no correct signal can be determined. 

I've checked today with my own Reuter Pocket.
In SYNC with removed carrier by shifting the DSP filter
you hear distorted audio of an AM signal sideband with varying pitch
as the sync detector is looking for a carrier to synchronize with.
But SYNC is not the mode with the IQ audio signals I was referring to.
This is only possible in DSB or DSBQ mode (without the need of a carrier).
The stereo effect is created by combining both sidebands like in a FM stereo encoder,
i.e. R+L for the mono or mid signal and R-L for the difference signal.
Both together create the stereo signal where you hear LSB on the left side
and USB on the right side in your headphone.

73
Clemens
DL4RAJ


> -----Ursprüngliche Nachricht-----
> Von: premium-rx-bounces at mailman.qth.net <premium-rx-bounces at mailman.qth.net> Im
> Auftrag von Peter Ratuschni via Premium-Rx
> Gesendet: Donnerstag, 10. November 2022 00:36
> An: premium-rx <premium-rx at mailman.qth.net>
> Betreff: Re: [Premium-Rx] Is there a portable radio with ISB detection?
> 
> Hello Clemens,
> thanks for the hint! I have been recently on the Reuter website, but the information you
> provided is somewhat hidden in the manual - ISB is even not mentioned. Yes, Reuter is likely
> "premium-rx"... and I have to weigh nuggets ;-)
> But: "Further manual adjustment of bandwidth and / or shift such that the carrier is no longer
> within the audible range prevents demodulation." That makes me wonder if audio is muted in
> mode SyncSB if no correct signal can be determined. I think, I should ask Mr. Reuter.
> It is just because I love to tune around within the HF-band with my wj-8611 in ISB-mode.
> Some audio is always there, even if there is no ISB/SSB signal. The same feature in a
> portable radio would be great.
> best regards
> Peter
> 
> > Gesendet: Mittwoch, 09. November 2022 um 17:24 Uhr
> > Von: "Clemens Paul" <cpaul at gmx.net>
> > An: "'Peter Ratuschni'" <zpz at gmx.de>
> > Betreff: AW: [Premium-Rx] Is there a portable radio with ISB detection?
> >
> > Hi Peter,
> >
> > there is a portable SDR receiver that puts out an I and Q signal in
> > DSB in the left (I) and right (Q) earphone audio channel.
> > Thus LSB is audible on the left channel and USB on the right channel
> > https://www.reuter-elektronik.com/html/pocket.html
> > But I guess this is not what you are looking for?
> > Being curious, for which purpose you would need ISB?
> > The receiver is not cheap either.
> >
> > 73
> > Clemens
> > DL4RAJ
> >
> 
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