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14.2.5
DCSS
Description:
DCSS Digital Channel Stacking system: signal distribution system using frequency transposition.
Used in satellite distribution for multiple or single dwelling, with several set top boxes.
To give several receptors access to the whole spectrum and all polarizations, you need one coaxial cable
per receptor and a suitable installation (multiple LNB, Quattro and multi-switches).
The DCSS system allow to feed dwellings with one or more satellites using only one coaxial cable
(SCD=SINGLE CABLE DISTRIBUTION).
The DCSS is an extension of the DiSEqC protocol that allows the connection of several receptors on only
one coaxial cable, no matter the band (H/L) and the polarization (H/V).
Functioning:
Each satellite receptor uses a fix frequency band (Slot or Port), whose width is (more or less) equal to the
width of the transponder.
The receptor requires a specific transponder frequency (frequency Ku) via a DiSEqC command.
Some equipment on the satellite dish (LNB or switch) moves the requested signal to the center of the select-
ed band (Slot). Then, the mixing equipment adds each user band (Slot) to only one output (up to 32 user
bands).
S a t A - H i g h / H o r i z o n t a l
S a t A - H i g h / H o r i z o n t a l
S a t A - L o w / H o r i z o n t a l
S a t A - L o w / V e r t i c a l
S i g n a l s u r u n s e u l c â b l e
7849B – 7859B – 7817B
T r a n s p o n d e u r s
B a n d e s u t i l i s a t e u r s ( S l o t )
T p 1
T p 3
S l o t 1
S l o t 2
S l o t 3
p.
70
T p 2
T p 4
S l o t 4
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