Thank you Dave ! Well, . I live remote from any local noice - If I tune right outside the FT8 frequency I have nothing at all on my S meter . I can have a SSB QSO with stations not even lifting my S meter at all. The IC-7851 have a grate receiver
But what it might be - is that - like just now on 20M - I have some Spanish stations peeking my S meter to 9+30dB And the station list is giving them +20 on the dB indication Right now - more than 50% of my receiving stations have more than +10dB to +16dB on that scale And sure the AGC is limiting the ability to receive weak stations on the same frequency ? To the other observation - For me it looks like the SW is decoding the same frame over and over gain ? As long as the receiving station is calling me - and I answer - it all will continue as long as the other station is calling me - and the signal level will be the same all the time - it never changes ? As soon as I change my receiving OR transmitting tone frequency by 1 Hz up then down - or hitting the CQ frame selector - then at the same time the same station is replying with its receiving level - and then all is ok from there It's like its already decoded, but not shown - as it pops up straight away - not delayed until decoding next timeframe and so on ? Regards Steinar Fremme ___ E-mail: stei...@fremme.at Phone: +436649263301 Skype: stfremme Web: https://1250rt.com Ham: OE4KSF > On 14 Aug 2019, at 19:46, David Gilbert <xda...@cis-broadband.com> wrote: > > > Greetings Steinar. > > It seems to me that both of your issues could be caused by a high local noise > level at your end. Let's look at the second issue first. > > WSJT-X doesn't report the absolute signal strength ... it reports the signal > strength relative to a (if I remember correctly) 2.5 KHz bandwidth at the > receiving location. As an example, if your local noise level is 10 dB higher > than most other locations (easily possible), your transmit reports as > measured at the other end are going to be 10 dB better than the receive > reports you tell the other station. Your local noise could be higher due to > many possible factors ... local industrial activity, a neighbor with an > older plasma TV, somebody nearby using a welder, poor quality LED lights, a > noisy internet router, etc. > > The same thing might be causing your first problem if your local noise level > isn't consistent, which it probably isn't. It is possible that sometimes you > simply don't hear the other station's reply. In your example, you wouldn't > know if the other station had already sent R-02 previously if your noise > level had popped up briefly and covered it up. WSJT-X doesn't tell you how > many times the other station had sent the same report. You say it only > happens rarely, so maybe the fact that doing something else fixes the problem > is simply coincidence based upon small sample size. > > Obviously I cannot say for certain ... I am just trying to offer helpful > speculation. But a higher than typical noise level at your location ... for > any reason ... could produce similar symptoms. > > I have the opposite "problem". The noise level at my QTH is very low, so I > often give better reports than I receive and I often hear (read) > transmissions from other stations who can't hear me even though I have good > antennas and live on a steep hillside. For the same signal strength each > direction a station I can consistently read at -22 or -24 will usually not > be able to decode me. > > Best regards, > Dave AB7E >
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