iDirect Evolution 8000 Series, Инструкция по установке и безопасности

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56 iDirect Evolution 8000 Series Satellite Router Installation and Safety Manual
Hardware Connections for a Mobile Remote
6.2.3 Handshake Signals
The remote sends an RS-232 active signal on the console port output on pin 2 while the
modem is trying to acquire the downstream carrier. Once the downstream gets TDM frame
lock, the receive lock signal becomes inactive. This signal indicates to the auto-point antenna
equipment when to switch from coarse-tune mode to fine-tune mode.
Pin 5 input on the GPIO port can be used as a “mute” function and allows the auto-point
antenna equipment to delay acquisition transmit until the antenna has finished pointing.
Without this, the modem may transmit as soon as detecting TDM frame lock, before the
antenna is pointed and polarized properly. Sending an RS-232 active level to pin 5 of the GPIO
port enables the mute function.
6.2.4 GPS Information
GPS information is entered into the remote either automatically by a GPS receiver or
manually by using the latlong command. This information sets the latitude and longitude of
the remote for acquisition purposes. Because the remote is mobile, this information is
considered to be temporary. Two minutes after entering this command, the latitude/longitude
information is considered outdated and it is not used again until it is re-entered. This
prevents a remote that has moved to a different location from transmitting before the new
information is entered.
The location information is needed only during acquisition of the remote into the network.
Once the remote is in the network, the uplink control process tracks the symbol offset
variations due to the mobility of the remote. If the remote loses acquisition after two minutes
and needs to reacquire the network, the latitude/longitude information must be entered
again.
In the absence of a GPS receiver interface to the modem, the latitude/longitude information
can be manually input to the modem through a telnet console interface or serial console
interface. The GPS receiver interface operates at 4800 baud; however, the console interface
(RJ-45) always operates at 9600 baud.
13 Receive Signal Strength
Indicator (RSSI)
DC voltage level output (0.0 to
4.6 VDC) used in antenna
pointing applications to provide
either receive composite power
measurement or receive C/N
measurement
14 Reserved Output Do not connect
15 Ground (GND) Ground
Table 25. HD-15(F) RS-232 Serial Port Pin Assignments (continued)
Pin Signal Name Description