OPERA: nouveau mode LF / MF par G4WGT

[F4DTL]

Transmission MF OPERA 2 de PA0A vue avec SL en QRSS1

[F4DTL]

OPERA 136 up date

The latest version as of 4/1/2012

http://www.mediafire.com/?w74a061m48nv806

Changes , time , audio band and mode select.

TX Time

Op 65 is now replaced with Op31

Op8 12% time reduced ~ Op 8

Frequency bands 136 mode only

Previous , two sub bands divided OP8 & OP64 , replaced with one audio-band

Audio frequency band now 1300 Hz to 1500 Hz

Suggested 136.000 KHz USB dial frequency.

S/N performance expected

OP8 -32dB Op31 -38dB S/N Mean values (not pk)


Note - Tx tone frequency is determined , when using audio drive , by a scanning routine , the Tx carrier is placed in a clear frequency slot , at each Rx/Tx transit.

GL All

73 -G..

[f5wk]

Premier spot sur 137480 le 6 janvier 2012:

15:48 136 F5WK de G0KTN Op8 467 km -23 dB in City of Bath, SW Englan

[F4DTL]

New version for down load

WINDOWS BUG FIXED

RX/TX Compatible with old version , please up grade as soon as possible .

File name opera v 1.0.2 exe

v1.0.2 Beta

Beacon timer from 1-60 minutes

Bit Code for use with PICs

Pls report if spots are working well

http://www.mediafire.com/?idmu7igsquiccyq

This version has Pop-Up that will indicate new version for download
this will direct you directly to down load link

Tnx to All

[F4DTL]

PIC Based opera code generator by G4JNT

http://www.g4jnt.com/PIC_Opera_Source.pdf
http://www.g4jnt.com/OperaBeacon.zip

PIC16F628A (although will easily fit into a 16F627A)
Link selectable for the four speeds and 8 duty cycle settings.
Active-low key line and Tx enable.

Use the 'PIC' option in the Opera.exe software to generate the 225
bit '0' / '1' pattern for your callsign.
Copy and paste to a text file and run the conversion utility to format
for PIC assembler.
Reassemble the source code, programme the PIC and enjoy...

When copying the bit pattern from Opera.exe, note that the "Copy"
button doesn't seem to do anything. You will have to use the standard
right click and copy-to-clipboard procedure.

I've tested by keying an audio tone at 2, 8 and 15 minute speeds and
getting correct decodes (you may have seen the reports during code
development & test phase earlier today). I couldn't be bothered
doing a full 31 minute test.

Andy
G4JNT

[F4DTL]

[O_P_E_R_A_] Quick Guide to Opera

See http://www.obriensweb.com/operaguide.html

Basic, but should help
--
Andy K3UK