Multiswitches
TERRA dSCR
Single-cable Cascadable dSCR Multiswitch: Terra SRM-580 (class A, active Terr.TV path)
Code: R80580
Terra SRM-580 multiswitch
Top view
The programmable SRM-580 multiswitch has four pairs of Legacy /dSCR +Terr. TV outputs. The SAT IF outputs allow in dSCR mode for independent operation of up to 32 SAT dSCR receivers/STBs, fed in via two coaxial cables (16+16, default configuration) or via one coaxial cable (32 from one output, after reprogramming with the PC102W R80561 programmer). In Legacy mode, each of the outputs can be used as typical SAT output (like in Universal LNBs or standard (legacy) multiswitches) for connecting a legacy SAT TV 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
- AGC system ensures stable 84 dBμV output level
- 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 cascadable 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 active 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).
The SRM-580 multiswitch has 5 inputs (four polarization/band pairs (VL–HL–VH–HH) plus active 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).
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:
Ferguson:
- Ferguson Ariva 154 Combo
- Ferguson Ariva 253 Combo
- Ferguson Ariva 4K Black
- Ferguson Ariva 4K Combo Black
- Decoder HD 5000
- Decoder HD 5500s
- EVOBOX PVR
- BOX+
- mediaBOX+
- turboBOX+
- wifi Premiumbox+
- UltraBox NC+
The diagram above shows an example installation based on cascadable single cable dSCR multiswitch SRM-580 with active terrestrial path
Specifications:
| Name | SRM580 | ||
| Code | R80580 | ||
Operating frequency range | SAT IF inputs | 950-2150 MHz | |
| SAT IF outputs | 950-2150 MHz | ||
| Terr. TV path | 47-862 MHz | ||
| Inputs / cascade outputs (trunk) | SAT IF | 4 | |
| Terr. TV | 1 | ||
| 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 loss | 6 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 | ||
| Isolation | 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 IN | 20 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 mode | 13 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 | -20ºC...+50ºC | ||
| Dimensions / Weight | 116x91x25.5 mm/0.28 kg | ||
Single-cable Cascadable dSCR Multiswitch: Terra SRM-580 (class A, active Terr.TV path)
Code: R80580
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