Technical Manual

11-75-0000 SYNTHESIZED PAGING TRANSMITTER TECHNICAL MANUAL Issue 0600
Sea Air and Land Communications Ltd Page 6
6.0 OPERATION
The 1175 can transmit three types of POCSAG message, with any one of four function levels:
•
Alphanumeric transmissions. Message can contain any alphanumeric ‘ASCII’ character.
•
Numeric transmissions. Message contains only Numeric characters and some symbols.
•
Tone Only transmissions (Alphanumeric or numeric with no message)
6.1 Alphanumeric transmissions
Messages can contain any alphanumeric character. The 11-75 will accept the standard ASCII 7 bit character set
.
6.2 Numeric transmissions
Messages can contain numeric characters and some symbols. These can convey a telephone number, or other numerically coded information. The transmitted
message is shorter, and therefore there is a smaller chance of errors received by the pager.
The numeric character set is as follows:
0 1 2 3 4 5 6 7 8 9 [ ] - E U <space>
Note. The E may be displayed as P or * on different pagers
6.3 Tone Only transmissions
Any numeric or alphanumeric paging message without an actual text message is also considered ‘Tone Only’. A function level will control the number of beeps
on the receiver (four different function levels can be sent).
7.0 INITIATING TRANSMISSIONS
There are four ways of initiating a paging message transmission:
(1) Using the external discrete inputs (action)
(2) Low supply detector threshold (action)
(3) Watchdog (action)
(4) RS232 Serial commands