dSCR (Digital satellite cable router) multiswitches SRM561, SRM581
Vers. 1.03
1
Product description
Cascadable single cable wideband multiswitches SRM561 and SRM581 are intended for the distribution of satellite and
terrestrial signals for up to 32 satellite tuners or receivers on each output pair.
The multiswitches have 4 passive Wideband SAT IF (for connecting 2 Wideband LNBs) and 1 active Terrestrial TV trunk
lines.
SRM561
is cascadable 6 output single cable multiswitch with 3 independent signal processors and have 3 pairs subscribers
outputs (6 outputs total) .
SRM581
is cascadable 8 output single cable multiswitch with 4 independent signal processors and have 4 pairs subscribers
outputs (8 outputs total).
The multiswitches are intended for the distribution of satellite and terrestrial signals for up to 32 satellite tuners or
receivers on each outputs pair and have 4 x DC power modes for convenient DC powering options (see chapter „
Installation
instructions
”).
The devices ensures an independent access for every subscriber to any SAT IF or Terrestrial TV trunk line.
These multiswitches automatically detect SCR/dSCR commands from the receiver. The dSCR switches also feature fully
automatic level control, negating the need for any gain or level adjustments in most installations.
Multiswitch is built into a zinc alloy die cast housing for extreme interference immunity. The housing of multiswitches meets
more stringent screening requirements according to EN50083-2, class A.
Control according to EN50494/EN50607 (SCR/dSCR) commands as well as Legacy (+13 V/+18 V/22 kHz) commands.
According to the standard ETSI EN 303 354 V.1.1.1, TERR TV band amplifier of multiswitch type is Launch, selectivity clasification 0.
Safety instructions
Installation of the multiswitches must be done according IEC60728-11 and national safety standards.
The multiswitches are powered from the stabilized power 20 V. This voltage is not dangerous to life.
External power supply must have a short circuit protection.
Any repairs must be made by qualified personnel.
To avoid damaging of the multiswitches do not connect the supply voltage until all cables have been connected correctly.
The device shall be mounted in vertical position with RF input connectors on the top side on a wall or other nonflamable surface.
The multiswitches must be fixed with steel screws Ø 4-4.5 mm. The screws are not included in a package.
Do not expose multiswitches to moisture or splashing water and make sure no objects filled with liquids, such as vases,
are placed near or on the unit.
Avoid placing the multiswitches next to central heating components or direct sunlight and in areas of high humidity.
No naked flame sources, such as lighted candles, should be placed on multiswitch.
If the multiswitches have been kept in cold conditions for a long time, keep it in warm room no less than 2 hours before
powering.
The ventilation should not be impeded by covering the multiswitches with items, such as newspapers, table-cloths, curtains.
The mains socket of external power supply must be easily accessible.
IMPORTANT WARNINGS!
Before connecting any products to a system, it is essential to make sure the
system power supply is switched off
. Avoid
short-circuit or overload of any power supply. Never “HOT-SWAP” any system components as this may result in damage to
the newly introduced or existing components.
The SRM561, SRM581 multiswitches are intended only for indoor installation or installation in a suitable weatherproof
outdoor cabinet. These multiswitches must not come into contact with moisture or be installed in areas of high humidity or heat.
Multiswitches are suitable for moderate and tropical climates.
Always mount the multiswitches securely to a wall or bulkhead panel so it cannot hang or swing on its coaxial cables as
this may strain the internal circuit board and components.
Always connect all of the coaxial cables to the multiswitches before connecting the power. These units are not designed
to be “HOT-SWAPPED” or connected to a live system.
Always be sure that connecting cables shield and multiswitches functional grounding clamp have common potential
before powering the system. Floating voltages can be created in an un-earthed system which may cause damage and can
be dangerous.
Momentary short-circuit of any cables may be enough to damage the sensitive electronics within the multiswitch or the
connected system.
Always allow plenty of ventilation around the multiswitch and do not allow it to be covered with materials such as loft
insulation.
We recommend at least 5 cm of airspace around the multiswitch. Digital products can get hot to the touch and require
a flow of air to avoid overheating.
The SRM561, SRM581 multiswitches are designed only to work with Ku band Wideband LNBs.
LNBs and other system equipment connected to the multiswitch SAT H1 and H2 trunks inputs/outputs can be powered
from the same power supply as the multiswitch.
To avoid damage not covered by warranty
DO NOT EXCEED MAX. CURRENTS
. See “
Technical
characteristics
” for max. current for external equipment.
DO NOT OPERATE THE DC POWER TO H TRUNK LINES SWITCH
(see Figure 1, pos.21) unless you
totally understand the power demands of the system and confirmed they are 2 A or less.
ALWAYS LEAVE
THE DC POWER TO H TRUNK LINES SWITCH IN THE "OFF" POSITION
when inserting SRM561,
SRM581 into an existing multiswitches installation.
Damage caused by current overload is not covered by the manufacturer’s warranty.
