9/12 Multiswitch: Terra MRS-912 (passive terrestrial path, class A)



Radial multiswitches of MRS series are dedicated for small and medium-size SMATV systems (4-70 outlets) distributing SAT IF and terrestrial signals. They are suitable for indoor use only. They can cooperate with splitters and taps of SS-9XX series. In the case of medium-size systems the multiswitches can cooperate with splitters and taps of SS-9XX series.
The radial multiswitches are intended for distribution systems based on star topology, where one multiswitch or a group of multiswitches is connected to the outlets of the end users via individual coaxial cables. They are therefore ideal for use in single-family houses or in single multi-family buildings. However, it is possible to use the MRS multiswitches in more complex systems. Then, the built-in power supply can be used to power other system components.
The MRS-912 R70412 multiswitch has 9 inputs and 12 outputs, and can directly be used for distribution of signals from two satellites, terrestrial TV (DVB-T) and terrestrial radio (FM and DAB) to 12 outlets. In the case of twin tuner PVR receivers, each device needs signals from two outputs of the multiswitch.
The die-cast housing provides high screening efficiency by preventing the penetration of interfering signals to the unit.
Due to a passive terrestrial path, the signal provided by the terrestrial TV antenna has to have adequate signal level. In the case of weaker signals, an appropriate antenna preamplifier will be needed.
Other option is to use multiswitches with active terrestrial path from the Terra MSR product line.
The input SAT signals to multiswitch systems are provided by QUATRO LNBs.
Distinguishing features
  • radial multiswitch
  • isolation between inputs better than 30 dB
  • possibility to power a terrestrial TV preamplifier (12 VDC)
  • built-in power supply
  • die-cast housing providing high screening efficiency (class A)
  • passive terrestrial path
9/12 Multiswitch: Terra MRS-912 (passive terrestrial path, class A)
View of the multiswitch

9/12 Multiswitch: Terra MRS-912 (passive terrestrial path, class A)
Top view
Name MRS-908 MRS-912
Code R70408 R70412
Number of outputs
8 12
Operating band [MHz] SAT 950 - 2400
DVB-T/Radio 47 -862
 Attenuation [dB]
SAT  8-4  9-6
 DVB-T/Radio  14 17 
Max. output level of  SAT signals (IMD3=35dB) [dBμV] 100
Screening efficiency class
Isolation between SAT inputs [dB] > 30
Isolation between outputs [dB] > 30
Isolation between paths [dB]  Terr./SAT > 30
SAT/Terr. > 45
Supply voltage at RF inputs [V]
H/Lo, H/Hi: 18 ; 
V/Lo, V/Hi: 14 ;
Terr. TV: 12
DC supply current from RF inputs [A] +18V&+14V&+12V < 0.7
+14V&+12V < 0.3
+12V ≤ 0.1
Power consumption from SAT receiver [mA] < 70
Control signals
14/18V, 0/22kHz, tone burst or DiSEqC 2.0
Power consumption (max load)
230 VAC 50/60 Hz 17 W
Operating temperature range [ºC] -20...+50
Dimensions [mm] 252x135x52 292x135x52 
Weight [kg] 0.86 1.0
The device is powered with 220-240V AC power network. All obligatory precautions for working with dangerous live voltages should be obeyed.
Recommended Library titles: