COBHAM SEA TEL 9711IMA-70, Installation Manual

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9711IMA-70 Configuring The Satellite Modem Interface.
9-5
9.1.4.6. Modem I/O – Block Output – 12V Pull Up
Use: The Modem I/O Block Output 12V Pull Up selection defines whether or not use a built-in
12VDC Pull up resistor for the hard lined wire input for Blockage output (TX Mute).
If your modem requires a continuity based input (Short to ground is Low, and Open is High) this
selection must be set to OFF. For all voltage based modem inputs, it MUST be set to ON.
Selection Type: Mutually Exclusive Radio Buttons
Options: 12V Pull Up OFF or ON.
Notes: Modem Type “Custom” must have been selected to allow changes to this setting.
Example: Your modem requires a high, voltage based, input to mute the modem. You would set
Polarity to Hi and 12V Pull Up to ON.
If your modem required a low, continuity based, input to mute the modem. You would set
Polarity to Low and 12V Pull Up to OFF.
9.2. Quick Reference: Common Modem Lock & Mute Settings
Modem
Type
Compatibl
e ABS
Mode
Lock
Input -
Lock
Lock
Input –
Polarity
Lock
Input –
Voltage
Lock
Input -
12V Pull
Up
Block
Output -
Polarity
Block
Output -
12V Pull
Up
iDirect OpenAMIP* On Low 12 Off Hi On
ComTech ROAM* On Low 12 On Low On
Gilat N/A On Low 12 Off Low Off
Hughes N/A On Hi 12 Off Hi On
STM N/A On Low 3 Off Low Off
Viasat N/A On Low 12 Off Low Off
Custom CLI* On As Required As Required As Required As Required As Required
*NOTE: When interfacing ABS (via Ethernet connection) Lock input and Block Output selections have no operational impact.
EAR Controlled - ECCN EAR99