Ok Andy,
Well its decoding off air ok at my qth , keying looks ok offair and at
birmingham ,
im running 10 watts per tone (20 watts peak during dual tx)
I have just made a qsy inside the passband , to set the jt65 above the
wspr
signal ,
jt65 now using sync tone 1700 Hz dial freq still 501.5 usb
Im not sure if wspr and wsjt6 will run at the same time , but I can try
over
the wekend
if needs be , ive just downloded the windows version of wspr .. but not
sorted out the
soundcard yet as he's using , 0123 ... very trad hihi
Tnx - G ..
----- Original Message -----
From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Saturday, March 22, 2008 8:28 PM
Subject: Re: LF: Re: Re: WSPR == ON AIR TEST NOW 1545 HRS = 503 KHz
> Very Interesting. In the WSJT user screen there are several sucessive
> -19dB S/N individual listings and, out of 70 sequences, it has
> selected 22 of them as being valid, but not one single correct decode.
> Experience on JT65B receiving the GB3RAL and GB3VHF beacons shows
> that -19dB S/N will give perfect copy, and -22dB will decode after two
> or three averaging sessions, so there's something very odd going on.
> What I can make out on the spectrogram, the sync tone is in
> more-or-less the righ place.
>
> Your WSPR signal is just 3 Hz low, and the JT65A sync tone about 15Hz
> lower that stated, which is more than near enough for a valid decode -
> and the user screen shows its doing just as it should - with some
> strong enough individual demods BUT NO DECODES - why???????????????.
>
> Do I understand you are not using the actual WSJT software to encode
> the data? Are you actually sure the MultiPSK implementation is doing
> its job properly.
> Try WSJT 5.98
>
> Andy G4JNT
>
>
> On 22/03/2008, Graham <[email protected]> wrote:
>> Ok Andy,
>>
>> Looks like making headway ....
>>
>> I'm using multipsk (the test version) which has jt65-modes .. and
>> for
>> want
>> of a better way of describing the frequency ..sorry if it sounds a
>> 'cb'
>> like ... but .. ' The purple line' is set at the 1000 Hz mark on the
>> waterfall display giving 1002 hz showing on the l/h fequency window
>> ...as
>> you say is 270 hz (ish) from the normal point ... but if you set the
>> prog
>> to that point , means you can engauge the narrow filter
>>
>> WSPR is running at 1500 Hz tone o/p giving 503.00 khz rf carrier
>> frequency
>>
>> I though jt65 would of out performed wspr ...be intresting to see
>> the
>> parallel decodes
>>
>> Tnx - G ..
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "Andy Talbot" <[email protected]>
>> To: <[email protected]>
>> Sent: Saturday, March 22, 2008 7:03 PM
>> Subject: Re: LF: Re: Re: WSPR == ON AIR TEST NOW 1545 HRS = 503 KHz
>>
>>
>> > Hi Graham
>> > Yes, I've got the right sequence time and am running WSPR and WSJT
>> > 5.98 in parallel. Surprising the WSJT averaging won't extract a
>> > valid
>> > decode. Some of the sessions are being tagged as having the sync
>> > detected, with a resulting 2.5kHz S/N in the --25dB ballpark, but
>> > they
>> > don't want to seem to be pulled together by the averaging. The DF
>> > figure is coming up as -285Hz, suggesting you're 15Hz lower than
>> > advertised (should be -270Hz)
>> >
>> > Do have very bad QRM here. I've just gone over to th the old 137kHz
>> > antenna minus its loading coil rather than the HF vertical that was
>> > the existing 500kHz Rx. The LF Tee is further from the house and
>> > there is about 10dB less localised E field noise. Its a pity about
>> > the deliberate jamming taking place just above the upper tone
>> > frequency. I'm not sure how well JT65 can cope with that.
>> >
>> > Update on the WSPR decodes below - it really does seem a very good
>> > weak signal mode. I'm just about to write June's Data Column for
>> > radcom. I'll give WSPR a section having now played with it for a
>> > while in real hard off-air conditions
>> >
>> > Andy G4JNT
>> >
>> > c:\WSPR>wspr Rx 0
>> > 1750 8 -17 -0.1 0.001487 G0NBD IO83 37 28.3
>> > 1752 6 -18 0.1 0.001487 G0NBD IO83 37 28.3
>> > 1754 5 -20 0.0 0.001487 G0NBD IO83 37 28.2
>> > 1756 3 -20 0.1 0.001487 G0NBD IO83 37 28.4
>> > 1758 8 -18 0.1 0.001487 G0NBD IO83 37 28.9
>> > 1800 8 -14 -0.3 0.001487 G0NBD IO83 37 30.1
>> > 1802 1 -24 0.0 0.001487 28.7
>> > 1804 4 -20 -0.2 0.001487 27.5
>> > 1814 3 -22 -0.2 0.001487 28.1
>> > 1816 1 -23 -0.6 0.001487 27.9
>> > 1818 4 -24 0.0 0.001487 27.8
>> > 1820 7 -19 -0.4 0.001487 G0NBD IO83 37 27.4
>> > 1822 3 -24 -0.1 0.001487 27.6
>> > 1828 2 -24 -0.3 0.001487 20.1
>> > 1830 5 -23 -0.2 0.001487 G0NBD IO83 37 27.2
>> > 1832 4 -20 -0.1 0.001487 G0NBD IO83 37 24.6
>> > 1834 4 -24 -0.3 0.001487 G0NBD IO83 37 21.9
>> > 1836 5 -23 -0.2 0.001487 G0NBD IO83 37 22.8
>> > 1842 2 -24 -0.3 0.001487 G0NBD IO83 37 23.2
>> > 1844 1 -26 -0.3 0.001487 22.3
>> > 1848 7 -19 -0.2 0.001487 G0NBD IO83 37 21.9
>> > 1850 2 -24 0.0 0.001487 24.0
>> > 1852 7 -19 -0.1 0.001487 G0NBD IO83 37 27.3
>> > 1854 5 -19 -0.1 0.001487 G0NBD IO83 37 23.5
>> > 1856 3 -19 -0.1 0.001487 G0NBD IO83 37 24.9
>> >
>> >
>> >
>> >
>> >
>> >
>> > On 22/03/2008, Graham <[email protected]> wrote:
>> >> Ok Andy,
>> >>
>> >> Thanks for taking a look , the jt65 been running for a while now ,
>> >> did
>> >> you
>> >> have
>> >> the 2 systems on when you decoded the wspr signals ?
>> >>
>> >> jt56 is sending at even mins , check the birmingham grabber ,
>> >> should
>> >> show
>> >> the 2 tone sets
>> >>
>> >> Tnx
>> >>
>> >> Graham ,
>> >>
>> >>
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "Andy Talbot" <[email protected]>
>> >> To: <[email protected]>
>> >> Sent: Saturday, March 22, 2008 6:17 PM
>> >> Subject: Re: LF: Re: Re: WSPR == ON AIR TEST NOW 1545 HRS = 503 KHz
>> >>
>> >>
>> >
>> >
>> >
>> >
>> > --
>> > No virus found in this incoming message.
>> > Checked by AVG.
>> > Version: 7.5.519 / Virus Database: 269.21.8/1338 - Release Date:
>> > 3/21/2008
>> > 17:52
>> >
>>
>>
>>
>>
>
>
> --
> Andy G4JNT
> www.scrbg.org/g4jnt
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.519 / Virus Database: 269.21.8/1338 - Release Date:
> 3/21/2008
> 17:52
>
>
