N3AGE 160M
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Glenn Elmore
One vote in defense of the multi-spot filter is related to
VHF/UHF WSPR. It's not uncommon for GPSDO's and/or commercial
multi-mode, HF-UHF ham transceivers to have low level
mains-related FM (angular modulation) of their clock. Even if
there is only a little at HF, say -60 dBC on 20m, by the time one
looks close to the carrier at 23 cm it's 40 dB bigger and perhaps
producing a family of 50|60 Hz sidebands around the main carrier
which are only 20 dB down. They may not be noticeable on SSB. On VHF-UHF WSPR it isn't uncommon to run 50-100 watts in order to see the 500 mile/800 km aircraft scatter spots that are fairly easy to achieve with a mediocre station. For other spotters local to such a transmitter, each of the smaller sidebands may produce a perfectly valid WSPR spot since it is a legitimate WSPR signal. This can fill the database with several extra spots that makes a mess of things. Filtering to the largest removes this irritation. I suppose the HW solution to improve transmit spectrum is the
elegant one, but it's not always practical. It would seem that a
SW solution would be to keep track of modes and always consider
them separate spots without filtering. I don't expect WN to make changes of this sort any time soon... Glenn n6gn On 7/29/22 18:25, Rob Robinett wrote:
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I have been decoding Glenn and Elmers spots using KD2OM/T on an APi.
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You also might have noticed that I commented out the first line of the conf file so that both the APi and i7 are using defaults instead of the 10000 that it i7 used. I get correlation now on 20 meters between the two processors. Steve . On Jul 30, 2022, at 11:49, Rob Robinett <rob@...> wrote:
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Rob Robinett
I have just upgraded Steve to v 3.0.3.2 and added F2:F5:F15 on 20M, which means he can now decode Glen's N6GN and Elmer's N3AGE FST4W transmissions
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Gwyn Griffiths
Steve
You might find the Grafana graphs at http://logs1.wsprdaemon.org:3000/d/4xvGwI97z/wspr-and-fst4w-comparisons?orgId=1&var-receiver=BE&var-sender=N3AGE&var-band=160&var-rx_id=KD2OM&from=now-2d&to=now may be of use to you. Log on as usual with userid wdread and password JTWSPR2008 You can select the rx_id and then pull down which receiver you want to check on the left. WSPR-2 and the different lengths of FST4W are color coded. Gaps may be due to too much spectral spreading - but I can't be sure as zero is being shown for all spectral widths. You may need to check with Rob whether your copy of WD has this feature enabled. 73 Gwyn G3ZIL |
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Glenn Elmore
Different band/time combinations should be fine. But it seems to me that when I was transmitting simultaneous WSPR/FST4W with two audio streams into the same radio separated only by frequency that I only got one posted, usually WSPR. I think Wsprnet.org does filter. Maybe Rob can explain what happens elsewhere.
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Glenn n6gn On 7/29/22 17:06, Elmer G Musser wrote:
if you decode both they will show. different bands different times. |
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Elmer G Musser
if you decode both they will show. different bands different times.
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On Jul 29, 2022, at 3:57 PM, Jim Lill <jim@...> wrote: |
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Jim Lill
I don't think my dupe filter on the "8088" page would filter it.
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for myself, I show 2022-07-29 09:05 n3age 1.838101 -34 FN30hw 23 WA2ZKD FN13ed FST4W300 2022-07-29 09:15 n3age 1.838101 -37 FN30hw 23 WA2ZKD FN13ed FST4W900 -Jim On 7/29/22 15:28, KD2OM wrote:
Elmer, |
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Elmer,
I am not sure about this but believe that the dupe filters will ignore all after the first spot is heard. I hear you on 160 but only mode 2, I have to believe that if I heard you on that mode I would have heard the other modes as well. Someone will correct me if that is wrong. 73, Steve KD2OM |
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Elmer G Musser
My first time using GROUP, sorry if I botched this…
The 160M system will being broadcasting (1 watt into a 43’ vertical) MINIUTE MODE PERIOD 0 WSPR 120 5 FST4W 300 (skipping 120 as it is redundant with WSPR (IMHO) 15 FST4W 900 30 FST4W 1800 Rinse and repeat forever.
630M is back on air (all modes) 2200M awaiting power supply (it got HOT here and environment was not kind to equipmemt) 10, 15, 20, 30, 40 and 80 will soon be connected to a more stable reference. On the 10 thru 80 WSPR followed by FST4W 300 and repeat will continue unless there is a “study” where other scheduling is desired.
73’s N3AGE/Elmer
Sent from Mail for Windows
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