Loading ...
Sorry, an error occurred while loading the content.
 
  • Back
  • About Group

  • Join Group
added in the last 7 days
New MessagesSee All
  • Re: Coast to Coast on 2 meters

    Final count for 26' G0NBD<>G6AVK 2017-03-26 21:47:48 G0NBD IO83LK G6AVK JO01HO 321 144.180 -18 Op05_||||_~18dB 2017-03-26 21:37:29 G6AVK JO01HO G0NBD IO83LK

    graham787 1 day ago
  • Re: Coast to Coast on 2 meters

    2017-03-26 20:37:49 G6AVK JO01HO G0NBD IO83LK 321 144.180 -20 Op05__~20dB 2017-03-26 20:03:55 G6AVK JO01HO G0NBD IO83LK 321 144.180 -17 Op05_||||||_~17dB 18:37

    graham787 2 days ago
  • Re: 477 VK3ELV de SWL-VK3ELV (Australia): Op8 F:0% +3 dB in Mount B

    Mangawhai sdr 73-G, 17:23 477 VK3ELV de G0NBD-1 Op8 2537 km -22 dB F:26% in NZ sdr 1491.2 Hz with 50w + 1/4 Wave Long Inverted L, 20 metres 17:23 477

    graham787 3 days ago
Fetching Sponsored Content...

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.

Group Information

Group Settings

  • This is a restricted group.
  • Attachments are permitted.
  • Members cannot hide email address.
  • Listed in Yahoo Groups directory.
  • Membership requires approval.
  • Messages are not moderated.
  • All members can post messages.

Message History