Terra SRM940 User manual
dSCR (Digital satellite cable router) multiswitch SRM940
Vers. 1.01
1
Manual in .pdf
Product description
Cascadable single cable wideband multiswitch SRM940 is intended to distribute satellite and terrestrial signals for up to
32 satellite tuners or receivers on each outputs pair.
The multiswitch has 9 passive trunk lines: 8 for SAT IF and 1 for DTT.
The device ensures independent access for every subscriber to any SAT IF and DTT trunk line.
The multiswitch may be switched to Quattro SAT IF range input mode (for connecting 2 Quattro LNBs) by programmer
PC102W.
SRM940 is a cascadable single cable multiswitch with 2 pairs of subscribers outputs (4 outputs total) and an active DTT
path to subscriber output.
This multiswitch automatically detects Legacy/DiSEqC/SCR/dSCR commands from the receiver. The dSCR switches also
feature fully automatic level control for SAT IF, 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 multiswitch meets
more stringent screening requirements according to EN50083-2, class A.
Control according to EN50494/EN50607 (SCR/dSCR) commands and compatible with Legacy STBs supporting DiSEqC
commands.
Safety instructions
Installation of the multiswitch must be done according IEC60728-11 and national safety standards.
The multiswitch is powered from the stabilized power supply +20 V. This voltage is not dangerous to life.
The external power supply must have a short circuit protection.
Any repairs must be made by skilled personnel.
To avoid damaging of the multiswitch do not connect the supply voltage until all cables have been connected correctly.
The device shall be mounted in a vertical position with RF input connectors on the top side on a wall or other nonammable
surface.
The multiswitch must be xed with steel screws Ø 4-5 mm. The screws are not included in the package.
Avoid placing the multiswitch next to central heating components or direct sunlight and in areas of high humidity.
If the multiswitch has been kept in cold conditions for a long time, keep it in a warm room no less than 2 hours before powering.
The ventilation should not be impeded by covering the multiswitches with items, such as newspapers, tablecloths, curtains.
The mains socket of the 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 o. 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 SRM940 multiswitch is 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.
Always mount the multiswitch 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 multiswitch before connecting the power. This unit is not designed to be
“HOT-SWAPPED” or connected to a live system.
Always be sure that connecting cables shield and multiswitch 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
ow of air to avoid overheating.
SRM940 multiswitch is designed to work with Ku band Wideband LNBs or Ku band Quattro LNBs (see chapter
„Conguration”).
LNBs and other system equipment connected to the multiswitch SAT trunks inputs/outputs can be powered from the same
power supply as the multiswitch (see chapter „Installation instructions”).
To avoid damage not covered by warranty DO NOT EXCEED MAX. CURRENTS.
See „Technical characteristics” for max. current for external equipment.
Damage caused by current overload is not covered by the manufacturer’s warranty.
2
External view
DC IN 20V 2A
H H
H H
V V
V V Terr.TV
Terr.TV
Frequency SAT TV
range DTT
Trunk loss SAT TV
DTT
Current consumption 2 0 V 750 m A max
290-2350 MHz
47-862 MHz
4 dB
4 dB
dSCR multiswitch SRM940
2
1
2
1
Legacy / dSCR
+Terr.TV
Pair A
Pair B
H H
H HV VV V
SAT A SAT C
SAT B SAT D
SAT A SAT B SAT D
H H
H H
V VV V Terr.TV
SAT A SAT C
SAT B
Power ON
OFF
ON
+12V
100mA max
DC out DC out DC out DC out
DC out DC out DC out DC out
Manual:
1 2 3 4 51 2 3 4 5 6 7 8 9 26
21
22
23
24
19
20
25
10 11 12 13 14 15 16 17 18 27
Figure 1. External view of the multiswitch SRM940
1- SAT A V trunk input (SAT A VLo trunk input in Quattro LNB IF range input mode)
2- SAT A H trunk input (SAT A HLo trunk input in Quattro LNB IF range input mode)
3- SAT B V trunk input (SAT A VHi trunk input in Quattro LNB IF range input mode)
4- SAT B H trunk input (SAT A HHi trunk input in Quattro LNB IF range input mode)
5- SAT C V trunk input (SAT A VLo trunk input in Quattro LNB IF range input mode)
6- SAT C H trunk input (SAT A HLo trunk input in Quattro LNB IF range input mode)
7- SAT D V trunk input (SAT A VHi trunk input in Quattro LNB IF range input mode)
8- SAT D H trunk input (SAT A HHi trunk input in Quattro LNB IF range input mode)
9- DTT trunk input
10 - SAT A V trunk output (SAT A VLo trunk output in Quattro LNB IF range input mode)
11 - SAT A H trunk output (SAT A HLo trunk output in Quattro LNB IF range input mode)
12 - SAT B V trunk output (SAT A VHi trunk output in Quattro LNB IF range input mode)
13 - SAT B H trunk output (SAT A HHi trunk output in Quattro LNB IF range input mode)
14 - SAT A V trunk output (SAT A VLo trunk output in Quattro LNB IF range input mode)
15 - SAT A H trunk output (SAT A HLo trunk output in Quattro LNB IF range input mode)
16 - SAT B V trunk output (SAT A VHi trunk output in Quattro LNB IF range input mode)
17 - SAT B H trunk output (SAT A HHi trunk output in Quattro LNB IF range input mode)
18 - DTT trunk output
19 - DC 20 V power input, connected directly to H lines (see „Installation instructions”)
20 - Power ON LED
21 - Legacy/dSCR output1 pair A (UB+DTT)
22 - Legacy/dSCR output2 pair A (UB+DTT)
23 - Legacy/dSCR output1 pair B (UB+DTT)
24 - Legacy/dSCR output2 pair B (UB+DTT)
25 - Functional grounding clamp
26 - DC to DTT line external equipment switch
27 - Mounting supports
All sockets are “F” type.
3
Installation instructions
Read the safety instruction rst.
Fit multiswitch on mounting place and connect it (pay attention to the multiswitch inputs and Wideband or Quattro LNB
outputs marking, connect the isolated 75 Ω loads to the unused RF output F sockets), power on multiswitch.
Then switch on receiver(s). The multiswitch will begin the process of auto-detecting which type(s) of receiver connected.
All subscriber outputs are congured to connect legacy STB (supports DiSEqC +13/+18V / 22 kHz tone signals), but it
switches to dynamic mode SCR/dSCR if receives a DiSEqC command according EN50494/EN50607.
Disconnect RF cables or STBs from necessary outputs to reset to Legacy / Start mode.
Diagram of DC paths
Figure 2. Diagram of DC paths
H H
H H
V V
V V Terr.TV
Terr.TV
2
1
2
1
Pair A
Pair B
H H
H HV VV V
SAT A SAT C
SAT B SAT D
SAT A SAT B SAT D
H H
H H
V VV V Terr.TV
SAT A SAT C
SAT B
OFF
ON
+12V
100mA max
DC IN(H)
20V 2A
DC-DC
converter
PIN code
All User Bands (UB) are protected by PIN Code to prevent the set of UB from being used / disturbed by another user
(see Table 1).
Default settings
1. SAT IF inputs are congured to use 4 Ku-band wideband LNBs (SAT A/B/C/D, LNB LO=10.40 GHz / 10.41 GHz. See label
on multiswitch rear side and package).
2. All outputs are congured to connect legacy STB (supports +13 V / +18V/22 kHz signals), but it switches to dynamic mode
SCR/dSCR if receives a DiSEqC command according EN50494/EN50607. Output User Bands (UB) are the same in all
subscriber outputs (see Table 2).
3. PIN Codes (see Table 1 and see chapter “Conguration”).
4. Only one UB plan is set depended of delivery region, if you need another plan see chapter “Conguration” or contact
TERRA UAB.
Marking: v.0 Marking: v.1
User
Band
(UB)
PIN
Code
Bandwidth,
MHz
Central frequency,
MHz
Bandwidth,
MHz
Central frequency,
MHz
EN50494 EN50607 EN50494 EN50607
UB0
UB1 1 40 1210 1210 40 1210 no
UB2 2 40 1420 1420 40 1420 no
UB3 3 40 1680 1680 40 1680 no
UB4 4 40 2040 2040 40 2040 no
UB5 5 40 1284 1284 40 no 985
UB6 6 40 1516 1516 40 no 1050
UB7 7 40 1632 1632 40 no 1115
UB8 8 40 1748 1748 40 no 1275
UB9 9 40 no 970 40 no 1340
UB10 10 40 no 1010 40 no 1485
UB11 11 40 no 1050 40 no 1550
UB12 12 40 no 1090 40 no 1615
UB13 13 40 no 1130 40 no 1745
UB14 14 40 no 1170 40 no 1810
UB15 15 40 no 1330 40 no 1875
UB16 16 40 no 1370 40 no 1940
Marking: v.2
Bandwidth,
MHz
Central frequency,
MHz
EN50494 EN50607
46 1210 1210
46 1420 1420
46 1680 1680
46 2040 2040
46 1006 1006
46 1057 1057
46 1108 1108
46 1159 1159
46 no 1261
46 no 1312
46 no 1363
46 no 1471
46 no 1522
46 no 1573
46 no 1624
46 no 1731
Table 1
4
Conguration
The default setting of the device can be changed using dedicated programmer and software
This multiswitch can be congured:
1. Up to 32 User Bands (UB) per pair outputs (total 64 UB) for use with STBs supporting DiSEqC commands according
to standard EN50607 (dSCR).
2. Default settings Dynamic mode can be changed to Static mode.
3. Default setting Satellites A/B/C/D can be changed to Satellites A/B (for installation 2 Quattro LNBs (SAT A/B in the
case Quattro LNB IF range input mode).
PC Windows software can be free downloaded from www.terraelectronics.com.
Output conguration must be the same per pair of outputs, but can be dierent in others pairs. Each pair of outputs is
congured separately. Pay attention to the numbering of outputs.
See programmer user manual for more information.
Recommended accessories
1. Power supply PS202F
2. dSCR power inserter PI012
3. Multiswitch programmer PC102W
This product complies with the relevant clauses of the European Directive 2002/96/EC. The unit must be recycled or discarded according to applicable local
and national regulations.
Equipment intended for indoor usage only.
Functional grounding. Connect to the main potential equalization.
This product is in accordance to following norms of EU: EMC norm EN50083-2, safety norm EN IEC62368-1, RoHS norm EN50581.
This product is in accordance with Custom Union Technical Regulations: “Electromagnetic compatibility of technical equipment“ CU TR 020/2011,
“On safety of low-voltage equipment“ CU TR 004/2011.
This product is in accordance with safety standard AS/NZS 60065 and EMC standards of Australia.
Technical characteristics
* without external DC feeding
Type SRM940
Inputs
Frequency range SAT IF 290-2350 MHz
DTT 47-862 MHz
Number of trunk inputs & outputs SAT IF 8
DTT 1
Input level SAT IF 65-105 dBµV
DTT 90 dBµV max. (16 MUX)
Terr. TV noise figure < 8 dB
Outputs
Number of tap outputs 4 (2 pair)
Trunk output loss SAT IF 3 dB typical
DTT 4 dB typical
Output frequency range 47-862 MHz / 950-2150 MHz
Tap output with combined DTT user bands (dSCR mode) 32 max. per pair outputs, configurable
user band bandwidth (dSCR mode) 20-60 MHz, configurable
output level, AGC controlled (dSCR mode) 80 dBµV, configurable
output level, typical (legacy mode) 74 dBµV
DTT gain 0 dB
Decoupling SAT IF inputs/SAT IF inputs > 30 dB
SAT IF inputs/Tap outputs > 30 dB
SAT IF / DTT > 25 dB
General
Return loss / impedance > 10 dB / 75 Ω
DC pass through H trunk lines 3.2 A max., 1.2 A max. through one line
Current consumption from DC input* 20 V 750 mA max.
from STB 18 V 20 mA max.
Current pass from DC input to H trunk lines 20 V 1.15 A max.
to Terr.TV input, switchable 12 V 100 mA
Operating temperature range -20o÷ + 50oC
Dimensions/Weight (packed) 267x135x30 mm/0.8 kg
Draugystes str. 22, LT-51256 Kaunas, Lithuania, tel.: +370 37
-
31 34 44, fax: +370 37
-
31 35 55
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