MDS
SDM9
Quick
Start
Guide
(x790
Mode)
Table 3
lists key software commands for the transceiver.
Detailed descriptions are provided in the SD
Reference
Manual
. Commands can typically be used in two ways:
1. The basic command (shown first) may be entered alone to
issue a query or execute a simple command.
2. The basic command may be appended with additional
arguments (shown in brackets, if applicable) to further define
a setting.
RF Exposure Notice
The radio equipment described in this guide emits radio
frequency energy. Although the power level is low, the
concentrated energy from a directional antenna may pose a
health hazard. Do not allow people to come closer than
1.50
meters
to the front of the antenna when the transmitter is
operating with a 7 dBd (9.15 dBi) gain antenna. Use of
higher gain antennas means increasing the distance
accordingly.
FCC Part 15 Notice
Operation of this device subject to the following two
conditions:
(1) this device may not cause harmful interference,
and
(2) (2) this device must accept any interference
received, including interference that may cause
undesired operation. Any unauthorized
modification or changes to this device without the
express approval of the manufacturer may void
the user’s authority to operate this device.
Furthermore, this device is intended to be used
only when installed in accordance with the
instructions outlined in this guide. Failure to
comply with these instructions may void the user’s
authority to operate this device.
Table 3: Key Software Commands
Command Function
ALARM
Read current operating condition of the radio.
BAUD [xxxxx abc]
Set/display the data rate and control
bits.
BUFF [ON, OFF]
Enables or disables the internal radio data
buffer.
CTS [0-255]
Set/display the Clear-to-Send delay in
seconds.
DEV
Display modem control deviation.
DEVICE [DCE, CTS KEY]
Set/display device mode.
DKEY
Dekey the radio (transmitter OFF). This is generally
used as a radio test command.
DUMP
Display all programmable settings.
HELP
Shows available commands.
KEY
Key the radio (transmitter ON). This is
generally used as a radio test command.
MODEM [xxxx]
Set the modem characteristics of the radio.
PORT [RS232, RS485]
Set/display COM2 data port
interface settings.
PTT [0-255]
Set/display the Push-to-Talk delay in
milliseconds.
PWR [20-40]
Set/display the transmit power setting.
RSSI
Display the Received Signal Strength
Indication.
RTU [ON/OFF/0-80]
Re-enables or disables the radio’s
internal RTU simulator and sets the RTU address.
RX [xxx.xxxx]
Set/display the receive frequency.
RXLEVEL [-20 to 0]
Set/display the receive audio input
level.
SCD [0-255]
Set/display the Soft-Carrier Dekey delay in
milliseconds.
SHOW [DC, PWR]
Display the DC voltages and transmit
power level.
SNR
Signal-to-Noise Ratio, expressed in dB
SPECTRUM [xxx.xx]
Display the transceiver’s built-in
spectrum analyzer, where xxx.xx denotes center
frequency.
STAT
Display radio status and alarms.
TEMP
Display the internal temperature of the radio
in degrees C.
TOT [1-255, ON, OFF]
Set/display the Time-out Timer delay
in
seconds.
TX [xxx.xxxx]
Set/display the transmit frequency.
TXLEVEL [-20 to 0, AUTO]
Set/display the transmit audio
input level.
UNIT [10000...65000]
Set/display the transceiver’s unit
address.
4.0 COMMAND OVERVIEW
