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Single-cable dSCR Multiswitch: Terra SRM-580 (class A, active Terr.TV path)

Code: R80580

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Including VAT 484.47 EUR Disc. 0 %


Terra SRM-580 multiswitch
Terra SRM-580 multiswitch
Top view
Top view
The programmable SRM-580 multiswitch has two pairs of outputs. Each of the outputs can operate as dSCR OUT (the satellite signals transmitted via one coaxial cable can be split among multiple dSCR/Unicable receivers) and Legacy OUT (for connecting a standard SAT receiver).
Key features
  • Full compatibility with EN50494 standard - Unicable I - 8 UBs (User Bands) from each of the 4 pairs
  • Full compatibility with EN50607 - Unicable II - 32 UBs (User Bands) from each of the 4 pairs
  • Possibility of using receivers supporting EN50607 and EN50494 standards in the same subsystem (8 x EN50494 + 24 x EN50607)
  • Static mode: IF/IF converter
Single-cable SRM-580 R80580 multiswitch allows for distribution of DVB-S/S2 signals from one satellite and terrestrial signals (DVB-T, DAB/FM radio). The satellite signals can be distributed by means of dSCR technology (digital Satellite Cable Router), requiring only one coaxial line and satellite splitters to provide the signals to compatible SAT receivers, along with terrestrial signals that can be received by standard televisions and radios. The SRM-580 R80580 multiswitch fully supports receivers operating in two dynamic modes: SCR (Unicable I - 8 User Bans) and dSCR (Unicable II - 32 User Bands).
The SRM-580 multiswitch has 5 inputs (four polarization/band pairs (VL–HL–VH–HH) plus passive terrestrial TV) and 4 pairs of outputs: dSCR OUT (each allowing for independent operation of up to 16 SAT dSCR receivers/STBs fed via one coaxial cable - EN50607 standard) or operating as Legacy OUT (typical SAT output like in Universal LNBs or standard (legacy) multiswitches for connecting a legacy SAT TV receiver).
By default, all outputs of the SRM-580 R80580 multiswitch are configured as Legacy (controlled by 14/18 V and 0/22 kHz commands from SAT receivers). Any output switches to Unicable dynamic mode after receiving DiSEqC command compliant with EN50494/EN50607 standard. This means that each individual output can feed via a single coaxial cable and satellite splitters up to 16 receivers (EN50607).
The device can operate in two modes;

  • DYNAMIC - fixed output frequencies (User Bands) allocated for individual dSCR/Unicable receivers (distribution via single coaxial cable to up to 8 (EN50494 - UNICABLE I) or 32 (EN50607 - UNICABLE II) receivers);
  • STATIC - fixed input and output frequencies, IF/IF conversion allowing for distribution of signals from 32 satellite transponders to an unlimited number of receivers.
The programming of dSCR multiswitches is performed by the dedicated PC102W R80561 programmer.
The die-cast housing provides high screening efficiency by preventing the penetration of interfering signals to the unit.
Similarly to other multiswitches, the signals to the SRM-580 multiswitch should be fed from QUATRO LNBs.
The multiswitch should be powered from an external power supply, e.g. PS202F R71468 (20 VDC, 2 A).
The table shows the default settings of the SRM-580 R80580 multiswitch (operation mode - DYNAMIC, 16+16 User Bands, Bandwidth, Level), which can be modified by the dedicated PC102W R80561 programmer.
There are many models of satellite receivers available on the market today. Not all of them support SCR/UNICABLE system compliant with EN50494 and/or EN50607 standard. In the case of implementing solutions based on the standards, all receivers that will be used by subscribers must support SCR/UNICABLE technology. A list of popular satellite receivers available on the Polish market and supporting single-cable multiswitches is provided below:

Cyfrowy Polsat:
  • Decoder HD 5000
  • Decoder
  • BOX+
  • mediaBOX+
  • turboBOX+
  • wifi Premiumbox+
The diagram above shows an example installation based on cascadable single cable dSCR multiswitch SRM-580 with active terrestrial path
The diagram above shows an example installation based on cascadable single cable dSCR multiswitch SRM-580 with active terrestrial path

Operating frequency range
SAT IF inputs950-2150 MHz 
SAT IF outputs950-2150 MHz
Terr. TV path
47-862 MHz 
Inputs / cascade  outputs (trunk) 
Terr. TV
Number of tap outputs
 8 (4 pairs)
Return loss
> 10 dB
Input/output impedance 75 Ω
Input levels 
SAT  60...95 dBµV
DVB-T/Radio signals (active mode)
 max 92 dBµV
Noise figure (Terr. TV path in active mode) 7 dB
Legacy/dSCR output
Number of UBs (dSCR mode) max 32 (configurable for each of the 4 pairs)
UB bandwith (dSCR mode)  20...60 MHz (configurable)
Signal level (AGC, dSCR mode) 84 dBµV
Signal level (Legacy mode)  78 dBµV
Terr. TV path loss6 dB (active mode)
22 dB (passive mode)
Signal level of Terr. TV max 86 dBµV (active mode)
Gain of cascade lines (trunk)SAT IF  > -4 dB
Terr. TV
 10 dB (active mode)
-6 dB (passive mode)
Terr. TV output level
max 102 dBµV (active mode)
Current pass trough cascade lines (trunk)SAT IF Total: max 2 A; any path: max 1 A
Terr. TV 
 max 250 mA
SAT IF input / SAT IF input 
 > 30 dB
SAT IF input / tap output 
 > 30 dB
SAT IF / Terr. TV > 25 dB
Current consumption
From DC IN20 V, max 1.2 A
From H trunk lines 15 V 1.5 A; 18 V 1.25 A; 20 V 1.2 A
Terr. TV amplifier
 15-20 V, max 40 mA
From receiver
Legacy mode13 V, max 260 mA;
18 V, max 230 mA 
dSCR mode 13 V, max 360 mA;
18 V, max 290 mA 
Legacy + dSCR mode
Current pass from DC input o H trunk lines (switch)
20 V, max 800 mA 
Operating temperature range
Dimensions / Weight
116x91x25.5 mm/0.28 kg 


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