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Graham states... !
As there is no locking to 'actual /
time' delays may be introduced in the
tx keying chain,
But the delay must be symmetrical and
not change the pulse width , whilst being of a
constant value , to ensure the integrity of the
timing of the pulse train , pulse jitter
will degrade the s/n performance. % wise the
longer time modes , the larger the % error possible
, A figure of 0.2% for clock timing was
suggested at the start of the project .
G..
Sent: Saturday, June 02, 2012 5:11 PM
Subject: Re: LF: Re: beacon on 501.59kc/s USB RX
dial
Hi Pete,
Maybe its worth to spend a common mode choke or
an optocoupler between PA and PC? You may try just to key the TX with the PC via
an optocoupler. Should be no problem with Opera, as Graham states...
73,
Stefan/DK7FC
Am 02.06.2012 14:33, schrieb M0FMT:
Thanks Paul
Graham is right about QRG.
My PC keeps crashing so may go back to QRSS3 using my HB PIC keyer
(not affected by RF) on the same QRG. Thanks fer looking.
73 es GL Pete M0FMT IO91UX
could be 503.275 ? +/- a
bit !
G.
Sent: Saturday, June 02, 2012 12:58 PM
Subject: LF: Re: beacon on 501.59kc/s USB RX
dial
>on 501.59kc/s USB RX dial setting
What is the actual tx qrg then?
Just for exactly looking if the signal is visible at
all.
73
Clemens
DL4RAJ
-----
Original Message -----
Sent:
Saturday, June 02, 2012 1:21 PM
Subject:
LF: beacon on 501.59kc/s USB RX dial
Hi All
Please report my beacon on 501.59kc/s USB RX dial
setting. Temporary QRG.
73 Pete FMT
73 es GL Pete M0FMT IO91UX
E-Mail ist virenfrei. Von AVG überprüft - www.avg.deVersion: 2012.0.2178 /
Virendatenbank: 2425/5038 - Ausgabedatum: 01.06.2012
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