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07 Satellite Cables




Description

This article is from the Satellite TV FAQ, by Gary Bourgois flash@lopez.marquette.mi.us with numerous contributions by others.

07 Satellite Cables

This is a bundle of various wires and cables that run from the dish
to the receiver, and consist of cables for the C and/or KU LNB's,
Power to the LNB (Usually sent over the same COAXIAL CABLE) as well
as power for the positioner arm, return signals for position readout,
and control voltage for the polarotor.

Power to actuator Arm (Two conductors)
Return position readout from actuator (Two conductors)

The position readout cable from the actuator to the actuator controller
should have THREE conductors for the position sensor. For pot sensors, one
is for the tap, the other two are for the resistor. For pulse sensors, one
is ground, one is +5V, and the other is pulse input. Not all arms require
all three connections, but my scrounged Saginaw special has some nifty
hall-effect gizmo that does require power to generate pulses.

Power to polarotor (Two conductors)

Polarotors come in two different varieties. The "old style" just used a 12V
motor to rotate the probe. Apply power, it moves. Reverse polarity, it
changes direction. The new ones use a three wire connection. One for +5V,
one for ground, and one for "pulse".

RG-6U cable (rather than the often-seen RG-59U) is the cable of choice
for the higher frequencies of satellite TV.

 

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