IDP-280/IDP-290 - Hardware Guide
© ORBCOMM Proprietary 5 T212, Version 03
1.3
Operating Modes
The modem operates in the modes described in Table 1.
Table 1
Operating Modes
Operating Mode
Description
Transmit Mode
In transmit mode the modem is transmitting a signal to the gateway.
Receive Mode
In receive mode the modem is attempting or actively listening to the
satellite (listening on the bulletin board channel or on a traffic
channel).
Sleep Mode
This is the power saving mode when the modem turns its main
power off between wake-up intervals. Both the modem and gateway
track the wake-up interval. Consequently, when a modem is in sleep
mode it does not miss incoming messages. If a modem has a
message to send, it automatically exits sleep mode without waiting
for the next wake-up interval.
Idle Mode
In this mode the modem is awake, but neither receiving nor
transmitting.
1.3.1
Peripherals
These peripherals are either on or off. Power consumption is affected when they are
powered on.
Table 2
Peripherals
Operating Mode
Description
GPS/GLONASS
Can be powered on independently of the IsatData Pro receiver.
RS-232
The RS-232 transmit driver is enabled whenever a valid input
RS-232 signal is detected.
