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2 messages added in the last 7 days
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  • VK's on 40M

    Hi friends VK3KCX and VK3EHM both running 40M Opera overnight from Melbourne ~10W and dipole antennas at both stations. Hope that we can make the connection. -

    daveandshirl65 47 minutes ago
  • Re: 40 m QRP beacon

    Good DX Leo ! G, G4PMB https://pskreporter.info/pskmapn.html# 40m OPERA 2352 km 06:23:03 2E0ILY https://pskreporter.info/pskmapn.html# 40m OPERA 2142 km

    graham787 6 days ago
  • 40 m QRP beacon

    Hi, now running qrp beacon 7o39,5oo power 2W@Whip antenna. ... 17:31 7038 UA1ASB de UA9AAG Op2 1884 km -12 dB F:18% in MAGNITOGORSK with 2w + Whip 17:31

    7 days ago
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Group Description

OPERA IS AN ONGOING PROJECT

OPERA DOWNLOAD LINK :-
Download latest version from
http://rosmodem.wordpress.com

Single carrier Data/Beacon mode Tx/Rx package.

Tx by COM PORT CW Key
Tx By SSB Audio Drive
Tx\Rx COM port
CAT Link embodied
Transverter offset

Rx scanning routine places carrier in empty frequency slot by audio drive frequency change. [latest version , all bands based on 1500 Hz]

Mode is linked to BAND

Rate switch selects Tx speed.
(only on versions v1.5.3 & earlier)

Rx automatically matches Tx.

S/N performance expected,

Subtract 6 dB to compare with wspr/other data modes.

Opera is calibrated to the PathSim test software.

OP2 is approximate equal to WSPR, but the levels are average, not peak.

OP05 -20dB
OP 1 -23dB
OP 2 -26dB
OP 4 -30dB
OP 8 -33dB [ -37 Dynamic]
OP16 -37dB
Op32 -41dB [ -47 Dynamic]
Op64 -44dB

Op4H 8.9 KHz Sound card SDR (-49 dB lowest yet )

16KHz SDR Optical test version

QSO Mode (all bands) -20 dB s/n

S/N Mean (not peak) calibrated to PathSim
http://www.moetronix.com/ae4jy/pathsim.htm


OPERA IS AN ONGOING PROJECT
Download latest version from :-
http://rosmodem.wordpress.com

>>WANTED IDEAS + CONSTRUCTION OF LINKED DATA SERVER<<
>>To provide Mapping / Search functions

The only measure’s of a data mode is energy used /data transferred and the reliability of the recovered data , one is constrained by the laws of physics , the other by the ability of the designer.

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