6K V1.02 03-16-91
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8.
TWO-TONE SEQUENTIAL PAGE
A. Control Character
The Control Character
9930
must be entered before the actual page code when building a
two-tone sequential page message. If several two-tone pages are to be sent, the control
character
9930
must exist before each two-tone page code.
B. Format
Enter the Control Character,
9930
. Then enter four digits representing the frequency of the
first tone, taken from the Tone code Table. Then enter two digits representing the duration
of the first tone in tenths of seconds. The range of duration is 0.1 to 9.9 seconds. Then
enter four digits representing the frequency of the second tone, taken from the Tone Code
Table. Then enter two digits representing the duration of the second tone in tenths of
seconds. The range of duration is 0.1 to 9.9 seconds. You may end the message with the
*
character, or you may enter another Control Character (99xx) and continue with another
message type.
For example, the format of a two-tone sequential page of 349.0 Hz for 1.0 seconds followed
by 433.7 Hz for 3.0 seconds is
9930 2865 10 2306 30.
C. Delays
A 1-second pre-page delay is created by the Message Handler for the first page in a group.
If additional pages follow, the pre-page delay is eliminated in succeeding pages.
A 1.3-second post-page delay is created by the Message Handler for all two-tone sequential
pages.
