Initially, I was going to send this to another person, but in rereading your
message, I cut 'n paste it to you. It was more appropriate.
What are your thoughts regarding the position of your signal on a given
frequency, perhaps 7076, or 18102? One forum member strongly
recommended in a message a couple of days ago to make sure the
transmitter was REALLY, REALLY close to the station being monitored.
This will enable both parties to decode each other without taking up too
much bandwidth. He also made the comment that he had been set up
fairly narrow and missed a DX contact because he was not printing the
DX, even though the DX station was calling him nearby.
He wants an effort made to tune the transmitter to the sync tone position
of the station you're copying. With RIT off, and my ICOM IC-746 tuned
to 18102 and printing a station, won't I be right on frequency or really
close to him and his sync tone position as such? In my mind, that will
not happen unless by chance, it seems to me.
I'm asking because I had thought that my transmit frequency would be
changed much like for PSK but it apparently is not the case. So, if
that is so, I wonder what the correct protocol would be to accomodate
many stations on or about 14076, 18102, 7076, etc etc? AND, not
take a huge amount of bandwidth in each case, a protocol that we can
all agree upon and adhere to as applies to HF ops with VFO controlled
equipments?
Otherwise, if I'm trying to tune my ICOM so that his sync tone is "zero
beat" or whatever, in WSJT, it'll take forever due to the very slow decode
processing that occurs. H...is this software normally used
with channelized radios on VHF/UHF?
What if we set up specific frequencies to operate on, sort of like mini-
channels; so many Hz between each one? With RIT off, maintaining
USB or LSB consistently, with today's radios, wouldn't better operating
practices be enjoyed along with fairly consistent success? It seems to
me that the matter of the importance of the Sync Tone would be better
addressed than by happenstance.
Just asking newbie questions, perhaps with an air of the mushroom
notwithstanding.
Howard W6IDS
Richmond, IN
- Original Message -
From: David Michael Gaytko // WD4KPD
To: DIGITALRADIO ; WSJT
Sent: Friday, April 06, 2007 9:53 PM
Subject: [digitalradio] help prevent qrm
20m was a mess today, everyone planting on 076.
this is not necessary ! try this...
set in spectrum the jt65 DF axis option
freeze the program to 0, with tol to 200
tune whichever station you wish to tune by shifting
your dial to place the sync tone on 0
>SNIP< >SNIP<
