Re: LF: SSB modulation for WSPR

To:	[email protected]
Subject:	Re: LF: SSB modulation for WSPR
From:	Andy Talbot <[email protected]>
Date:	Wed, 21 Oct 2015 11:13:57 +0100
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Need to ask the obvious - is the frequency recorded in Joe's spots the actual one you were transmitting on? Exactly, spot on, to the Hz ?

When you say I and Q are "somewhat different", do you mean, the wrong way round, or unequal amplitued, or not in quadrature. All would contribute to a component on the wrong sideband and / or frequency as well as the correct one

Seems a bit odd that your one actual decoded spot was quite weak copy at a respectable distance. Judging from my dual mode transmission the other day, there are quite a few monitoring stations closer.

Andy

On 21 October 2015 at 10:15, LineOne <[email protected]> wrote:

So far the only person to decode my WSPR transmissions is Joe, DF2JP.

I made a drive unit for 136kHz to utilise 4 different methods of modulation including quadrature switching for SSB. Having just discovered that a fault caused the I and Q channels to be somewhat different I wondered what the effect would be and why Joe was the only one to decode it?

The carrier frequency is never more than 0.8Hz out, time is spot on via GMT (UTC) and the sound card is perfectly accurate so receive decoding is good.

Hugh, M0DSZ.

(P.S. I have no intention of signing up to Yahoo).

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LF: SSB modulation for WSPR, LineOne LF: AW: SSB modulation for WSPR, Joe LF: Re: AW: SSB modulation for WSPR, G3WCB LF: 137 kHz WSPR Activity tonight, G3WCB LF: AW: 137 kHz WSPR Activity tonight, Joe Re: LF: SSB modulation for WSPR, Andy Talbot <= Re: LF: SSB modulation for WSPR, LineOne Re: LF: SSB modulation for WSPR, DK7FC AW: LF: SSB modulation for WSPR, Joe

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