>What is the effect of the sound card clock adjustment?
Nothing as far as data transmission/reception is concerned. With ansynchronous
communications. you need a clock at each end running at (in the case of 45.5
baud, close to) the same frequency. The leading edge of the start bit tells
the receiver to start clocking the data bits into individual registers. The
meaningful exchange is over once the agreed upon data and parity bits have been
sent. The stop bit(s) are a vestige of the electro-mechanical days. They
provided a time slot to imprint the character.
If RTTY is "slow", it can only be due to more stop bits being sent in a
character than necessary, or very inefficient shifting. It's not due to the
sender's bit clock being slow - that would just cause the transmission to be
indecipherable.
Al
AB2ZY
-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com] On
Behalf Of Ktfrog007@aol.com
Sent: Monday, March 21, 2011 7:51 PM
To: rtty@contesting.com
Subject: Re: [RTTY] RTTY
Hi Don,
What is the effect of the sound card clock adjustment? Is it related to speed
issues?See Calibrate the Sound Card in the Help file and the Misc tab in MMTTY
setup. I've never understood what it is and what the adjustment does.
73,
Kermit, AB1J
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