Company Confidential
20
Raveon Technologies Corp.
7. Using the M8T in Paging Mode
This section describes the operation of the M8T when it is in the
paging receive
mode.
There are two ways to configure the M8T to operate as a paging receiver. The
M8T may be configured to use just one protocol 100% of the time as defined by
the
ATMT
command. Or, the M8T may be configured with a second “Alternate
Protocol”, that may be selected using the input pin 15.
1.
Configured by Command
. With ATMA set to -1 to disable the
alternate protocol, the ATMT command will select the current operating
mode, either data modem or paging.
ATMT 0
selects data modem
mode, and
ATMT 3
selects POCSAG paging receiver command. With
ATMA
set to -1, the
ATMT
command will always determine the
protocol the M8T is using.
2.
Hardware Select:
Issue the
ATMA 3
command to set the Alternate
Protocol to paging decode. When
ATMA
is set to any number other
than -1, the M8T will use input pin number 15 to select between two
possible protocols. Protocol numbers are: 0=data radio, 3= POCSAG
decode. Pull input pin 15 high, enabling the alternate protocol.
The factory default configuration is ATMA 3 and ATMT 0.
7.1.
Setting Cap Codes
Cap Codes are the “ID” of the paging receiver. When a paging message is
receive dover-the-air with a cap code that matches any one of the M8T’s
configured cap code registers, the M8T will receive the paging message. The
M8T has multiple cap code registers. To configure a cap code register, use the
CC x command, where x is the cap code register number. Setting a cap code to
-1 or 0 disables the particular cap code.
For example, to configure the M8T to receive pages sent to cap code 12345,
issue the following command:
CC 1 12345
By factory default, the cap code is set to 12345, and all other cap code registers
are disabled. If you issue the AT&F command, the cap codes will be reset to
factory defaults.
For test purposes, the promiscuous receive mode may be enabled using the PM
x command. If
PM
is set to PM 1, then the cap codes are ignored, and the M8T
will receive all paging messages.
7.2.
Setting Paging Data Format
Pagers are generally either numeric, alpha-numeric, or tone. Most paging
transmitters specify the type of pager message they are sending, by setting the