Dcss - Triax MCT059 User Manual

15.2.2

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=SIN-
GLE 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 selected
band (Slot). Then, the mixing equipment adds each user band (Slot) to only one output (up to 32 user bands).
Sat A - High / Horizontal
Sat A - High / Horizontal
Sat A - Low / Horizontal
Sat A - Low / Vertical
Signal sur un seul câble
The DCSS mode has priority on all other modes: selection polarization, selection
OL, switches committed and uncommitted and positionner.
– MCT059 –
Tra nspondeurs
Bandes utilisateurs (Slot)
Tp1
Tp3
Slot1 Slot2 Slot3
p.
67
Tp2
Tp4
Slot4