[vdr] Re: Rotor power: Was (Re: Re: cool down of dvb 1.3)

["Reinhard Walter Buchner" <rw.buchner@freenet.de>]

Hi Beppe,

> > power. Both of these chips can easily handle the LNB power
> > needs (max 500mA as per specs). The boost convertor can
> > handle 3A cont (6A peak) and the LNBP can sink 900mA
> > continious duty.

> Has this chips some short circuit protection?

Yes, These chips have two methods of protection:

- thermal overload: shutdown
- short circuit protection: instant shutdown

> I read the list and saw that the Rotor HH-100 is
> working with DVB-S.

This may have been my post ;o)) I use the HH-100
here. During testing of my diseqc routine and later
Klaus' tuning thread I must have run my dish from
end to end (42E - 58W) some 50+ times ;o)) The
DVB stays pretty cool. Okay, it does get warmer,
but you can comfortably touch all parts, so they
*are* less than 50°C.

> So i bougth one. In a hurry i set it up(the sun was
> on its way down, and  it start to snow and i was
> like a child on Christmas Eve :p )

The HH-100 is an execellent rotor IMHO. You can
step it in small incrediements. It is very precise in
during a repositioning . I noticed no signal strength
degrading after many moves. Very robust internals.
It incorperates an "intellegent" slip clutch. I.e. if
your dish locks or you hit a wall, the slip clutch
saves the motor and gears,  BUT the motor *still*
know what the real position is. On some rotors you
are out of luck if this happens, because the slip clutch
is after the positioner ;o(. If this happens, you need
to readjust the whole motor including the internal
endstop switches (means opening the motor unit!)

> When i start my machin it didn't move :/ finding out
> that i put  the LNB cable in the reciver's input on
> the rotor :/

Here, I go from the DVB-S up to the motor (i.e: in)
and from there to the LNB (ie.: out). No amps, no
frills, no external psus)

> Do you still use your HH-100?

Yes ;o)) Even in the winter with a heavy load of snow
on a 80 cm dish, the motor moved flawlessly w/o
complaining. So I am very happy with it.

> What Rev do you have on your card?

A DVB-S Rev 1.6. IMHO the only way to fly.

> If i manage to get a new card rev2,1 or 2,2, i still
> have guarantee on  it. Is it safe to use it with out
> any LNB power amplifier and have the right
> connection on it :o)

*Dont* use any kind of LNB pre-amp. At least here,
when I used mine, (in the beginning) I had some troubles
getting the motor to save the satellites. After removing
the pre-amp all problems where gone (this also happend
when I tried it with my commercial STB).Since the
signal strength didn't go down (I have about 15m (45ft)
of good quality coax cable from the receiver to the
LNB), I just left the preamp out. Works fine.

A few check points on the config:

- Did you change the diseqc & channels config accordingly?
  You will need to tell VDR *where* the birds are. I.e. the
   sources conf tell you 19.2E, but your diseqc.conf must
   supply  the necessary "Goto satellite" command.

- Make sure your F- connectors are cleanly installed (no
  fray wires, etc). Don't extend coax cable. Rather use a
  single length of cable.

- If you have a commercial STB, it makes setting up the
  rotor easier (to save the birds to the motor eeprom) I
  have a diseqc plugin in mind (started working on it a
  while ago, but fiddling with the VDR basecode, put it
  on the backburner for now). This plugin will allow you
  to adjust and set the motor up in many ways

Greetz,
Reinhard


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