Graham, LF,
Thanks for the help earlier, I have the hang of the software now.
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73
Gary - G4WGT - IO83qp
----- Original Message -----
From: "Graham" <[email protected]>
To: <[email protected]>
Sent: Monday, October 15, 2007 8:34 PM
Subject: LF: Re: Olivia data test ,to night 503.300 ~ 20:00 hrs local >
midnight
The 'mpsk' function set is a bit over powering .. but ...
How to set mode
Olivia .... click on the green button .. 'OLIVIA'
You will see at the top of the waterfall display , squelch slider .(set
0)... afc button .. then to the right .. cluster of 8 buttons 4-250
4-500 etc ....
click on , lower left button marked 250-8 .(sets mode to 250 hz bw @
tones 8)
tune as normal ... if signal is very low , switch 'afc and lock' off to
stop wandering caused by noise
G ..
----- Original Message -----
From: Graham
To: [email protected]
Sent: Monday, October 15, 2007 7:08 PM
Subject: LF: Olivia data test ,to night 503.300 ~ 20:00 hrs local >
midnight
Hi,all.
To date , not tried a multi tone data system .
The Olivia system , would seem to print well into the noise ..may out
perform psk31
The 'multipsk' software has a 250 x 8 tone setting 250 hz/bw 8 tone freq
, I shall set the 'purple' center freq marker , to 503.3 dead (+/- few
c/s) . the output spectrum looks quite clean , and should not spread .
There are wider versions , but 250 should be 'ok' --- If anyone is xtal
fixed , plse let me know and i can qsy
>>>> Sorry to those who 'know' , follows notes on reception <<<<<<
As its possible , from observation at 'HF' olivia will print from below
the noise level , accuate rx seting may be neede ,
rx settings 'usb' - dial frequency to give recovered audio center
frequency to that of the transmission and software settings
i.e. The tx settings will be -dial frequency - 502.000 Khz , mode usb
.. software tx/rx tone , center frequency, 1,300 Hz , giving 503.3
'carrier'
The reverse applies for 'rx' dial 502 , usb , software , -purple mark-
1300 Hz
using a narrow filter should not be needed as the soundcard/software will
provide the slectivity, also narrow filtering may 'round' the pulses and
reduce the s/n at the rx .
NB .. The new 'digital master 780' also supports the mode, but dosent
appeare to support the '250x8' narrow version .. other packages may do.
Software can be downloaded from :-
http://f6cte.free.fr/index_anglais.htm
select :-
MULTIPSK.ZIP (Multipsk + Clock)
Tnx
Graham
G0NBD
io83lk
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