6K V1.02 03-16-91
50
7.
SINGLE-TONE PAGE
A. Control Character
The Control Character
9920
must be entered before the actual page code when building a
single-tone page message. If several single-tone pages are to be sent, then the control
character
9920
must exist before each page code.
B. Format
Enter the Control Character,
9920
. Then enter four digits representing the frequency of the
page tone, taken from the Tone Code Table. Then enter two digits representing the
duration of the page 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 single-tone page of 1050 Hz for 8.0 seconds (the National
Weather Service standard page) is
9920 0952 80
.
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 3-second post-page delay is created by the Message Handler for all single-tone pages.
