The OTHER GUY makes sure that he transmits Mark on the higher RF
frequency and Space of the lower RF frequency with a 170 Hz
shift. You do not care whether he does this on USB or LSB. At your
end YOUR equipment requires 2125 and 2295 for Mark and Space
respectively, it is YOUR responsibility
At 10:39 PM 9/24/2006, you wrote:
>--- REPLY FOLLOWS
>
>Perhaps I misunderstood. I thought you said you couldn't receive 200
>Hz shift. Sorry.
>
>Bill, W6WRT
Using a ST-6 I can't - but using a AEA-232 that I have I can
Need a Digital mode QSO? C
ORIGINAL MESSAGE:
On Sun, 24 Sep 2006 21:59:22 -0500, John Becker <[EMAIL PROTECTED]>
wrote:
>I could but why replace something that works? And has
>for 25 years Like daddy always said - "if it ain't broke
>don't fix it".
REPLY FOLLOWS
Perhaps I misunderstood. I
I could but why replace something that works? And has
for 25 years Like daddy always said - "if it ain't broke
don't fix it".
At 09:39 PM 9/24/2006, you wrote:
> REPLY FOLLOWS
>
>You might want to consider retiring the ST-6 and using MMTTY. It
>switches easily betwee
The ST-6 is looking for a mark tone of 2125 and a space of 2295.
If for some reason the other guy is on USB but still with 2125 &
2295 tones I can flip the reverses switch and copy him just fine.
If he is using a TNC that has the 200Hz shift I can't copy.
At 09:21 PM 9/24/2006, you wrote:
>Your
ORIGINAL MESSAGE:
On Sun, 24 Sep 2006 20:36:53 -0500, John Becker <[EMAIL PROTECTED]>
wrote:
>This is a problem for me as my ST-6 terminal unit does care what the
>mark and space frequencies is. Off be more then a few Hz and I can't
>copy. Same holds true for the 200 Hz shift TNC - can't copy t
Your ST-6 has no idea what RF frequencies the Mark and Space
at. You tune until you get 2125 for Mark, then if the shift is
170Hz you will be looking for 2295 for Space. If the Mark is sent
with a high RF frequency with respect to the Space, then you need to
be on LSB. We have discussed on
Comments in line.
At 09:23 PM 9/22/2006, you wrote in part
>Today, we don't have these limitations. We do need a standard, and
>the standard is still to transmit the mark as the high frequency, and
>the space as the low frequency. The shift for FSK is now 170
>Hz. Terminal units that used f
The reason that LSB historically has been used for RTTY was that the
equipment in the early days had difficulty dealing with FSK. On the
demodulator side you had to choose frequencies that would not
produce harmonics to fool the demodulator. Back then the frequency
shift was 850Hz, and it wa
I ask this before but tell me again why al the sound card
modes are on USB when all the *pre* sound card modes
(RTTY, PACKET, AMTOR & PACTOR and others) are
all LSB
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