Tait T2000-A75, Руководство по эксплуатации

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36 M2256-000-00-051 November 2001
SEND_SDM (PC to A75)
The SEND_SDM command requests the A75 to send a Short Data Message (SDM). The PC
sends the SDM directly to the A75, and the T201X immediately keys up the transmitter. After
the specified SDM Lead In Delay the A75 sends the SDM. The SDM does not need to include
a [MESSAGE] parameter.
The SEND_SDM command can only be used in command mode, but an A75 can receive SDMs
in both Command mode and Transparent mode.
Example
An example of a ‘Send SDM’ message is: s0DFF0800TESTHi!B3
[IDENT]
s
[PARAMETERS]
[LEAD_IN_DELAY] [DATA_MESSAGE_ID] [MESSAGE]
[PARAMETER] Function
[LEAD_IN_DELAY]
SDM Lead In Delay
. Two ASCII hex characters representing the SDM Lead In
Delay between radio transmitter key-up and the start of data transmission. The
range that can be entered is 00 to FF.
The Lead In Delay is calculated by multiplying the number by 20 ms.
A minimum of at least 100 ms of Lead In Delay is required, so 00 to 04 will always
be treated as 05. This corresponds to a Lead In Delay between 100 ms and 5.1
seconds, in steps of 20 ms. Refer to the
Sending and Receiving Short Data Mes-
sages (SDM) section.
[DATA_MESSAGE_ID]
SDM Data ID
. An 8-character string representing the SDM Data ID of the radio to
which the SDM is sent. It can be any alphanumeric characters. “
*
“ is the wildcard
for any character. e.g. 12
**
5678
When a radio receives a SDM message, the Data ID is checked against the ID
entered in the radio database (using the
PROGRAM command). If the Data ID
matches, the received SDM data is stored and the radio sends a PROGRESS
command to indicate this.
If the Data ID does not match then the SDM data is ignored.
[MESSAGE]
SDM text
. Maximum 32 characters of SDM data. [MESSAGE] is optional.
Message Field Parameter
Entered at
terminal
[IDENT] TRANSPARENT. t
[SIZE] Size of parameter field 01
[PARAMETERS] [LEAD_IN_DELAY] of FFh = 255 x 20ms = 5.12 seconds FF
[DATA_MESSAGE_ID] to address radio unit 0800TEST 0800TEST
[MESSAGE] string ‘Hi!’ Hi!
[CHECKSUM]
Refer to the
Calculating the [CHECKSUM]
section
B3