Hello John,
As far as I know, there are no public specifications or description of THOR
modes.
73
Patrick
- Original Message -
From: vk2eta [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Saturday, October 11, 2008 12:01 PM
Subject: [digitalradio] Re: Sound card question
Message -
From: Patrick Lindecker
To: digitalradio@yahoogroups.com
Sent: Saturday, October 11, 2008 9:25 AM
Subject: Re: [digitalradio] Re: Sound card question
Hello John,
As far as I know, there are no public specifications or description of THOR
modes.
73
Patrick
- Original Message -
From: Patrick Lindecker
To: digitalradio@yahoogroups.com
Sent: Saturday, October 11, 2008 9:25 AM
Subject: Re: [digitalradio] Re: Sound card question
Hello John,
As far as I know, there are no public specifications or description of THOR
modes.
73
There is a basic outline of THOR at:
http://www.w1hkj.com/FldigiHelp/Modes/THORdesc.htm
Perhaps someone can help us understand the difference between THOR and
DEX/FEC (Domino EX with FEC). Aren't they very much the same concept, or
is there a design difference?
73,
Rick, KV9U
Patrick
Development Team
- Original Message -
From: Patrick Lindecker
To: digitalradio@yahoogroups.com
Sent: Saturday, October 11, 2008 9:25 AM
Subject: Re: [digitalradio] Re: Sound card question
Hello John,
As far as I know, there are no public specifications
Hello John,
As said by Vojtech the big problem is the synchronization. As there is no
specific synchro signal, you must synchronize of the signal itself (using
some non-linear function). The synchronization is primarily done for the
theoritical modulation speed with the hypothesis of a pefect
Hello Paul,
Multipsk - will it store/save the correction between applications?
No you must calibrate each application with the true sound card speed.
If I have a choice between a 16 bit external soundblaster and a 24 bit
external sound blaster, which should I use at what setting for best
I
A significant difference between TX and RX can result in an offset. During
my holidays in Oct / Nov I will add full soundcard calibration for all modes
in DM780.
Simon Brown, HB9DRV
www.ham-radio-deluxe.com
- Original Message -
From: Dave [EMAIL PROTECTED]
What impact, if any, does
Hello Dave,
It is simple. If the offset in sampling frequency is x% and the true AF
frequency is f0, the displayed frequency f will be equal to
f=f0*(1-x/100)
Example: if the sampling offset is +1% and f0 is 1000 Hz, the frequency
displayed will be equal to 1000*(1-0.01)=990 Hz
73
Patrick
Thanks, Patrick!
If I understand this, then, here is what I should expect:
My sound card calibrates to 48009.37, which is .9998% fast
I transmit with an audio frequency of 2415 Hz
I am therefore actually transmitting on 2439 Hz, or .9998% higher
than indicated
Does that
, 2008 11:28 PM
Subject: Re: [digitalradio] Re: Sound card question
Thanks, Patrick!
If I understand this, then, here is what I should expect:
My sound card calibrates to 48009.37, which is .9998% fast
I transmit with an audio frequency of 2415 Hz
I am therefore actually
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