Hi All,
It looks like such glitches is usual behaviour for loud JT signals, while it is
not clear if it caused by TX side, receiver, RX sound card or WSJT-X RX
processing.
Spectrum of the glitches is concentrated around the loud signal there.
73 Igor UA3DJY
>
>Date: Wed, 20 Jan 2016 17:48:39 -0500
>From: Joe Taylor < j...@princeton.edu >
>Subject: Re: [wsjt-devel] decoding problem
>To: WSJT software development < wsjt-devel@lists.sourceforge.net >
>Message-ID: < 56a00ec7.9090...@princeton.edu >
>Content-Type: text/plain; charset="iso-8859-1"
>
>Hi all,
>
>I've attached two screen shots showing examples of the test I suggested.
> Both show the Wide Graph, with WSJT running as usual.
>
>Test #1: Radio set to USB and tuned to 879 kHz. The bright signal at
>1000 Hz is the carrier of WCBS, a 50 kW AM station at 880 kHz, about 50
>miles away.
>
>Notice how clean the spectrum is in the region +/- 200 Hz from the
>carrier. That's because AM stations roll off their audio at frequencies
>lower than about 200 Hz. (Spectral features more than 200 Hz from the
>carrier are the broadcast station's audio modulation.)
>
>Test #2: radio set to 28.076, unmodulated signal from RF generator just
>above 28.077. Again there's a strong signal at about 1000 Hz.
>
>Importantly, in both cases there are no close-in horizontal streaks on
>either side of the strong carrier. No glitches.
>
>-- Joe, K1JT
>
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