>>>AA6YQ comments below
-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com]On
Behalf Of Ktfrog007@aol.com
Sent: Friday, January 21, 2011 11:23 AM
To: rtty@contesting.com
Subject: [RTTY] AA6YQ-FIR-512 Ignore Framing Error
Hi Dave,
I am curious about the Ignore Framing Error setting in your FIR-512. All
I know about it is what I read (below) in the Help file and my
interpretation is that it would have only a marginal positive effect, if at
all. No
other profile I've encountered sets it ON. In my own experiments with
FIR-512 I've turned it both ON and OFF, but so far I can't see much of an
effect
either way.
>>>I created a repeatable testing environment using AE4JY's Pathsim and
>>>VE3NEA's RTTY compare. Decoding a -10 db SNR RTTY signal is noticeably more
>>>accurate with "Ignore Framing Error" enabled.
>>>Drawing conclusions from weak on-air signals is risky, as the quality of the
>>>signal changes from second to second.
73,
Dave, AA6YQ
73,
Kermit, AB1J
Ignore Framing Error
When the ignore framing error box is checked on Option | Setup MMTTY |
Decode tab, the data are captured without regard to the stop bits. This leads
to decoding of uncertain letters–there will be print of poor copy, but
there is a high likelihood of garbled (wrong) characters.
In a message dated 1/21/2011 2:46:04 A.M. GMT Standard Time,
aa6yq@ambersoft.com writes:
>>>Besides the tight filter around the received singal, the AA6YQ-FIR-512
profile is configured to enable majority logic and to ignore framing
errors.
73,
Dave, AA6YQ
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