Graham; Temps here went from 8F to 40 yesterday and last night. No doubt had something to do with poor condx. Soil conductivity in this region of NY state is sensitive to temp. Soil conductivity drop
G; I think many had gone to other bands this side. US activity was way up on MF and can't force guys to just decode one station when they can decode many more on 600 meters-Bob From: [email protected]
Marcus Jose has reduced the decoder pass band to 50 Hz , this reduces the over heads on the 'decision' process , it seems to be a harsh environment , compared with say 136 . there where some AFC impr
Bob,all Results from the psk-map 73,G, Only decode one showing ? but there is a data set , unless the Tx power increased by 8 dB and fell back , that looks like the path is variable ? What was the Fa
Graham wrote: Ok Bob Looking at the data set , AC4IU levels where very close over the 2 nights in the -40 +/- range ... Im not sure everyone was on side that night ! Early days hihi Graham, I was awa
Ok Bob Looking at the data set , AC4IU levels where very close over the 2 nights in the -40 +/- range ... Im not sure everyone was on side that night ! Early days hihi 73-G, From: Bob Raide Sent: Sat
Paul, I think Bob started 2200z symbol rate Opera2H: 32.768 s 239 bits = 130.5 MIns Tx cycle ? These uploaded decode times should be slightly after the end of each cycle , the opera decoder , only de
Could someone clarify for me the times given in the opera reports, eg -44 OPERA 07/03/2014 06:51 WH1XBA W4DEX EM95TG RX Op2H Is 06:51 the end time of an opera frame, or the start time? And, is the fr
An Opera sequence consists of 239 raw bits (actually Manchester code half-symbols). For Op-2H, each bit is 128 * 0.256 seconds long. For some reason, reported timestamps seem to be 3.5 bits after the
Thanks for that Graham. I'm just trying to see how far short we are of an opera decode. I just got another 0.84 dB S/N improvement by shifting the loop a little further from the prevailing noise, and
Hi Graham, well opds "dBOp" has been calibrated to display SNR on the same "average power" scale as Opera, ie carrier power in 2.5 kHz minus 4 dB. However I concede that opds SNR measurements are not
Ok Paul Well , Opera and Mark's systems are not the same , Opera is recovering data , with afc/fec , and the DS , devised by Marcus , is correlating the Opera encoded data pattern and requires high s
