Configuring The Iconnex E800 As A Mobile Remote; What Is A Mobile Remote - iDirect Evolution 8000 Series Installation And Safety Manual

6 Configuring the iCONNEX
e800 as a Mobile Remote
This chapter describes how the iCONNEX e800 can be configured as a mobile remote. It
contains:
•

What is a Mobile Remote?

• Hardware Connections for a Mobile Remote
• Configuring a Mobile Remote
• Monitoring a Mobile Remote
6.1 What is a Mobile Remote?
The iCONNEX e800 can be configured as mobile remote. In satellite TDMA systems, because of
the long distance variation between different remotes and the satellite, it is important that
the data sent by different remotes do not collide over the air. This is accomplished by adding
a delay to the packets at the remote, so that the packets arriving at the hub are received
synchronized to the frame marker. The delay that is added to each remote is known as Frame
Start Delay (FSD), and it is calculated by the NMS based on the geographical locations of the
remote, the hub, and the satellite.
As the geographical location of a mobile remote changes, the FSD also changes. The remote
calculates the FSD provided its own geographical location is known. When the remote is
configured as mobile remote, it receives for GPS data on the serial console port which
provides latitude and longitude information in the form of an NMEA string. The remote uses
this information to calculate the FSD and join the network. The remote needs to calculate the
FSD only during network acquisition. Once the remote is in the network, the symbol delay
corrections are made by the uplink control process.
The mobile remote also provides an input and output signal to the stabilizing antenna through
the serial console port. The output signal called lock indicates the frame lock status of the
receiver on the remote. The input signal called TxMute can be used to mute the transmitter
until the antenna pointing is complete. This signalling is activated when modem handshaking
is enabled in the NMS.
iDirect Evolution 8000 Series Satellite Router Installation and Safety Manual 53