Installation manual

Setup – Modem Connections, Setup and Test 6009-33 Installation Manual
11-1
11. Setup – Modem Connections, Setup and Test
In order to be compliant with FCC Order 04-286 and WRC-03 Resolution 902 the Satellite Modem MUST be connected to the
Antenna control Unit/Terminal Mounting Strip to provide TX Mute control functionality. The FCC/WARC requirements have
been adopted by ITU & ETSI for them to publish similar requirements. The current FCC/WARC requirements are:
• Mute the Transmit output of the Satellite Modem used in TX/RX antenna configurations when the antenna is
positioned where people may be harmed by the transmit power emanating from the antenna (RF Radiation Hazard).
• Mute the Transmit output of the Satellite Modem used in TX/RX antenna configurations when the antenna is
mispointed by 0.5 degrees, or more, and keep it muted until the antenna is within 0.2 degrees of peak pointing to the
satellite for a minimum of 5 seconds (FCC part 25.221 & 25.222 TX Mute requirement).
The connection will also provide External Modem Lock and GPS Latitude & Longitude.
The External Modem Lock output from a satellite modem into the ACU provides a positive Network ID input to the ACU when
the antenna is on the desired satellite. This input is NOT used for Tracking purposes, it is only used for satellite
identification to assure that the satellite which has been acquired is the correct satellite (else the ACU will resume searching).
The GPS output from the ACU provides the current ships Latitude & Longitude as an input to the satellite modem for mobile
mode operation.
All modems must be set for mobile operation and have hardware handshaking turned ON.
11.1. iDirect Modems
The 5100 mobile mode can be set to 1=Serial to use the Console port RJ-45 serial connector or 2=Ethernet to use a
LAN connector for TX Mute, Modem Lock and GPS position communication with the ACU.
Model Lock output Mute input Recommended
SYSTEM TYPE
GPS Input
Infinity 3100 LOW = Lock LOW to Mute 7 GGA string
Infinity 5100 LOW = Lock LOW to Mute 7 GGA string
11.2. Comtech Modems
Model Lock output Mute input Recommended
SYSTEM TYPE
GPS Input
570L LOW = Lock LOW to Mute 7 Not Used
600L LOW = Lock LOW to Mute 7 Not Used
11.3. Hughes Modems
Model Lock output Mute input Recommended
SYSTEM TYPE
GPS Input
HX-150 HIGH = Lock HIGH to Mute 151 GLL string
HX-200 HIGH = Lock HIGH to Mute 151 GLL string