FARGO electronic Digital Audio Board 7KDAB - Manual (Page 23)

7KDAB, Version 2.0, 19-Aug-2007
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Vyex LLC, 2003-2007 18
Speed
Two different control characters are supported for setting the speed. For normal cadences, the percent sign ( % ) is used
to select a speed ranging from 1 to 50 words-per-minute.
For code practice purposes, the inter-character speed may be supplied separately by using the asterisk ( * ) character to
select a speed ranging from 1 to 50 words-per-minute.
Note: When the ‘%’ character is used, it will set timing values for both the inter and intra character timing values,
so when using the ‘*’ control character, the ‘%’ control setting should precede the ‘*’ control setting.
Amplitude
A character sequence beginning with a up-caret ( ^ ) character denotes a change in amplitude command. The amplitude
is an 8 bit linear value and can range from 0 (off) to 255 (maximum).
Sending ‘Prosigns’
To send a prosign such as AR, AS, BT, SK, etc., any number of characters can be enclosed in brackets. The left bracket
( [ )has the effect of reducing the inter-character delay time to one dit time, and the right bracket ( ] ) has the effect of
restoring the inter-character delay time to three dit times.
Examples:
The following message sets the pitch to 880Hz, the amplitude to 128 (or half volume), 20WPM for the character timing,
and 13WPM for the inter-character timing, then sends “This is a Morse code message”.
~880^128%20*13This is a Morse code message
The following example sends “DE KA9FUR” using a different pitch for each character. Note that the command prior to
sending the ‘9’ is terminated using a backslash.
^255%13~1000D~1100E~1200 K~1300A~1400\9~1500F~1600U~1700R
The following example shows how to send a message containing a prosign.
Wx here is sunny [SK]
Send 8 dits like this [HH] or this [IIII] or this [EEEEEEEE]