Things have changed over this pasted year or so.
Many more new stations have come on and these newbies are running lower
power and RXers that may not be up to what some of the veteran ops are
using. There really isn't allot of room for QRO in the 630 meter
band-fortunately those of us that have been on awhile have authorization up
above 500 kHz. If I do any more QRO it will be above say 490 kHz [600
M band]-plenty of room up there-just announce a freq and folks will come up for
you-20W ERP should be the limit at 630M-Bob
> From:
[email protected]> To:
[email protected]> Date: Fri, 20 Dec 2013 17:40:45
+0000
> Subject: Re: LF: OPERA overload?
>
> Jay,
>
> Just pulled these back from the psk-data base ,
>
> + 8
OPERA 0.477 20/12/2013 00:15 United States 1387498502 WE6XGR FN12LQ
>
WD2XNS
> + 8 OPERA 0.477 20/12/2013 00:32 United States 1387499533 WE6XGR
FN12LQ
> WD2XNS
>
> +8 is 5/6 db up on my signal over 25
miles range ,
>
> That's definitely one up from 'Cookie' more to
Tall Boy , if Bob runs
> to double figures , then may be 'Grand
Slam'
>
> The spectrum w/f has no link to the decode engine , but ,
yes under
> those conditions the noise floor is going to be much
higher
>
> Can you generate a local signal 100% op4 , see if Bob
will run the
> timer , give you 4 tx 8 rx window , that would give a
value to the
> drop ?
>
> Use something like spec-lab to
give a better view , the w/f in Op is
> only a indicator / tune aid ,
what happens to the noise floor , carrier
> on / off ?
>
>
73-G,
>
>
--------------------------------------------------
> From:
<
[email protected]>
> Sent: Friday, December 20, 2013 1:24
AM
> To: <
[email protected]>
> Subject: LF: OPERA
overload?
>
> > G
> >
> > I have to take issue
with your earlier comments about OPERA being immune
> > to overload.
Check out the
> > waterfall below. I'm looking for OP8 signals out west
(UT and VE7) and
> > WE2XGR/6 running OP4 is
> > clearly
desensing the OPERA software. Sensitivity can be seen returning to
> >
normal between keyed
> > characters.
> >
> > The
receiving setup is a 1000' BOG (beverage on ground) > Harris RF-590
>
> receiver > Delta 44 sound
> > card. Receiver AGC is off and the
received signal level is well below that
> > to cause gain
compression
> > in the receiver. Likewise, the sound card is being
operated well below
> > compression/clipping levels.
>
>
> > Weak signals do not decode under these conditions ... same as
with WSPR.
> >
> > Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2
>
>
> >
> >
> >
> >
>
