[vdr] VDR and polarization problems

"Sami J. Mäkinen" sjm at almamedia.fi
Wed Nov 9 09:49:42 CET 2005


Harri Helmroos wrote:
> It's a universal twin-lnb with two f-connectors (female) at the bottom 
> of the lnb. All three lnb's are twin's. From the bottoms I have pulled 
> two cables to two separate diseqc's. One diseqc is for my standalone 
> receiver and the other for my pc. I have no idea if the lnb's have 
> inbuilt switches, couldn't find any info on the lnb's either than the 
> normal text's.

No, those LNBs just have two separate outputs.
They behave exactly like two independent universal LNBs,
but they happen to see the same satellite on the same dish.

> Oh yeah, the twin's are bought from our famous everyday shop called 
> Biltema (here's the link for the lnb: 
> http://www.biltema.fi/osteri/osteri.cgi?sivu=skriptisivut/index_kauppa.htm&linkki=24065.htm&tuote=24065) 

> The diseqc's are also bought from the same quality shop (here's the link 
> for the diseqc: 
> http://www.biltema.fi/osteri/osteri.cgi?sivu=skriptisivut/index_kauppa.htm&linkki=24067.htm&tuote=24067) 

I know this stuff. I bought those once and got too interested
in satellite systems and upgraded soon to a four-LNB multifocus
Triax dish. (Astra1, Hotbird, Sirius and Thor with a single dish)

The old Biltema dish went to my parents' summer cottage. :)
Works there with no problems, with a 99e FTA dvb-s box.

> I have tried both of the diseqc's with my pc, both behaving exactly the 
> same. However, the standalone receiver has no problems with the lnb's 
> nor the diseqc switches (I tested with both switches).

Hrrmhmph, I bet your 4x1 switch behaves like mine.
Those other guys use F0..F4 command byte to address
the ports, but my diseqc switch uses these command bytes:

#22 Position A
#23 Option A
#26 Position B
#27 Option B
# port 1 option a position a
# port 2 option a position b
# port 3 option b position a
# port 4 option b position b

The above applies to Biltema 4x1 switch
and to my current switch too. Don't remember
the name, though. Might have been Digiality or not.

So in your setup I assume that you have ports and LNBs like this:

1 - S1.0W
2 - S5.0E
3 - S13.0E
4 - not used

This diseqc.conf should do the trick:

# port 1
S1.0W  11700 V  9750  t v W15 [E0 10 23] W15 [E0 10 22] W15 t
S1.0W  99999 V 10600  t v W15 [E0 10 23] W15 [E0 10 22] W15 T
S1.0W  11700 H  9750  t V W15 [E0 10 23] W15 [E0 10 22] W15 t
S1.0W  99999 H 10600  t V W15 [E0 10 23] W15 [E0 10 22] W15 T

# port 2
S5.0E  11700 V  9750  t v W15 [E0 10 23] W15 [E0 10 26] W15 t
S5.0E  99999 V 10600  t v W15 [E0 10 23] W15 [E0 10 26] W15 T
S5.0E  11700 H  9750  t V W15 [E0 10 23] W15 [E0 10 26] W15 t
S5.0E  99999 H 10600  t V W15 [E0 10 23] W15 [E0 10 26] W15 T

# port 3
S13.0E  11700 V  9750  t v W15 [E0 10 27] W15 [E0 10 22] W15 t
S13.0E  99999 V 10600  t v W15 [E0 10 27] W15 [E0 10 22] W15 T
S13.0E  11700 H  9750  t V W15 [E0 10 27] W15 [E0 10 22] W15 t
S13.0E  99999 H 10600  t V W15 [E0 10 27] W15 [E0 10 22] W15 T

# port 4
#Sxx.yE  11700 V  9750  t v W15 [E0 10 27] W15 [E0 10 26] W15 t
#Sxx.yE  99999 V 10600  t v W15 [E0 10 27] W15 [E0 10 26] W15 T
#Sxx.yE  11700 H  9750  t V W15 [E0 10 27] W15 [E0 10 26] W15 t
#Sxx.yE  99999 H 10600  t V W15 [E0 10 27] W15 [E0 10 26] W15 T

If the order of ports is different, just edit that.
Not that difficult, is it? Just read the diseqc pdf spec. :)

-sjm




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