[mythtv-users] Re: DVB-S Users: Anyone have C-band?
mfrisch at isurfer.ca
Sun Oct 30 22:36:52 EST 2005
On 30-Oct-05, at 5:50 PM, Greg Grotsky wrote:
> I currently have a DVB-T setup with MythTV working using the
> HD-3000 and I like it alot. I've been thinking lately that it
> would be really cool to have a satellite hookup and access to many
> more than just the 6-7 local ATSC channels. I checked out the
> zap2it config for satellite C-band and 4DTV channels, they are both
> loaded with stations.
Keep in mind that most 4DTV channels are subscription only and even
then, much of the good programming is not accessible to consumers
(they are used for feeding cable systems).
I had a 4DTV and had my Twinhan DVB-S connected to my C/Ku-band dish.
I sold my 4DTV (due to lack of interest) last year and took down my C-
Band dish earlier this year. It's dying. Far more exciting stuff
out there with a 1m dish and a DiSEqC motorized mount.
> I did some research about doing C-band (8' dish) and I'm wondering
> how does one control the actuators on the dish in order to point it
> at different satellites? All the acutator control information and
> tuned channel data doesn't come down the same coax cable, does it?
> Is the DiSEqC thing what is used to control the actuators?
With a large dish, there are 1 coax each for C and Ku-band, two DC
power wires, and 3 additional wires for the polarotor motor.
The smaller dishes (typically 1.2m or less) that use DiSEqC motorized
mounts send the dish positioning signals and power for the motor down
the same coax as the signal. Given the size/weight of typical C-Band
dish, there isn't enough power carried on coax to move one of these.
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