Bob , Well its true that Opera is a
averaging mode
But Most if not all now running on
477 are using the full system , don forget the system has no
need of high stability in the tx or rx being able to tack
drift by AFC , so any ham set / dongle etc is fine for Rx or Tx
, the com-port CW drive is primarily to allow access via
CW/QRSS transmitters , that cannot handle MFSK
Using Rx and the Tx-audio drive , the
carrier is placed in the lowest s/n 'slot' measured in the
mS's before the system state changes to TX , each
Tx of each user is on a 'new' qrg
The OP2 / OP4 modes are round the same
level as wspr-2 , the first TA's using Opera where using OP2 , OP8 is about as long as the 477 band will stand
,
The Op decoder is quite robust and is not
de sensitised by strong in/out band carriers , wspr was designed
for HF , where its very unlikely that ground wave level
signals would be encountered , strong carriers do suppress its
performance , Op was developed on 500/136 K , the shorter modes HF
and up
Thing would be to organise a 'top
fuels 477 party over there and see what happens
73,G,
Sent: Thursday, December 19, 2013 4:01 PM
Subject: RE: LF: WSPR2 coast-to-coast
Jay, et all;
I think if the "average Joe" on 500 would go through the trouble of
adding "Deep Search" to any of the OPERA modes, lower power beyond that
required by WSPR would be possible for similar decoding. Another plus
would be not having to limit numbers of transmissions per hour because
of the less likely RX overloading. But the "average Joe" isn't gonna
go through the trouble of adding "DS" to OPERA, I would assume? Bob
> From:
[email protected]
> To:
[email protected]
> Date: Thu, 19 Dec 2013 07:24:58 -0500
> Subject: LF: WSPR2 coast-to-coast
>
> G
>
> There were 31 WSPR2 'coast-to-coast' (west coast US and EU
simultaneous receptions) on 475 kHz last
> night from WE2XGR/2 alone ... WE2XGR/2 > K7IUV and WE2XGR/2
> G3XKR. Apparently WSPR2 wins the
> 'coast-to-coast' competition on 475 kHz ... especially so when one
considers WSPR2 is a two minute
> cycle time and OP's best time is 4 minutes.
>
> And ... this was done with moderate transmit power.
>
> Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2
>
>
