Vojtech and Patrick thanks you for the reply. I effectively didn't
realize synchronization was so critical too. Interesting.
Just a comment/question to both, since you are both developers of
widely used programs (and I take this opportunity to thank you both
for that), I discovered the THOR mode
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
The following is an excerpt from the web page Sights and Sounds of
Digital Signals, http://www.w1hkj.com/FldigiHelp/Modes/index.htm.
THOR Modes
General Description
THOR is a family of offset incremental multi-frequency shift keyed
modes with low symbol rate, closely related to DominoEX. A
Hi John.
1. I noticed that although most PSK31 signals I receive are showing
the two phase positions as displayed on the scope at 180 degrees,
some are consistently at less angle than that, typically down to
about 135 degrees. When I say consistently I mean it is obviously not
just a
be so good as a synchronous mode (as PSK31 for example).
73
Patrick
- Original Message -
From: vk2eta [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Friday, October 10, 2008 3:48 AM
Subject: [digitalradio] Re: Sound card question
While we are on this interesting subject
: [digitalradio] Re: Sound card question
If I run one of the calibration routines - what MixW supplies or
Multipsk - will it store/save the correction between applications?
That is, is it a one time fix?
Or does each application/mode have a correction field that I must
adjust - then it saves
While we are on this interesting subject of sound card calibration I
have a question in regards to the effect of the calibration itself on
the capability of properly decoding the signals.So two questions:
1. I noticed that although most PSK31 signals I receive are showing
the two phase
If I run one of the calibration routines - what MixW supplies or
Multipsk - will it store/save the correction between applications?
That is, is it a one time fix?
Or does each application/mode have a correction field that I must
adjust - then it saves it for recall like a preference?
I mostly
Thanks, Simon! It makes sense that if the native speed is 48K, any
other speed would require some type of conversion.
One more question, if I can impose on your good nature!
What impact, if any, does the error in sampling rate have on any
TX/RX offset? During the Tara Rumble I noticed that
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
- Original Message -
From: Dave [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Tuesday, October 07, 2008 3:57 PM
Subject: [digitalradio] Re: Sound card question
Thanks, Simon! It makes sense that if the native speed is 48K, any
other speed would require some type of conversion
: Sound card question
Thanks, Simon! It makes sense that if the native speed is 48K, any
other speed would require some type of conversion.
One more question, if I can impose on your good nature!
What impact, if any, does the error in sampling rate have on any
TX/RX offset? During
, 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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