Unitron Johansson 9743SH User manual

User Manual
SCR Multiswitch
Ref. 9743SH

Digital SCR Multiswitch (Ref: dSCR 9743SH)
2
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without permission.
Unitron reserves the right to change the specifications of the hardware and software described in these manuals
at any time.
Unitron cannot be held liable for any damages resulting from the use of this product. Specifications
are subject to change without notice. 1/17
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Digital SCR Multiswitch (Ref: dSCR 9743SH)
3
CONTENTS
1. INTRODUCTION .............................................................................. 4
Product description ............................................................................................ 4
Package contents .............................................................................................. 5
Mounting .......................................................................................................... 5
Typical application for the UK .............................................................................. 6
2. INSTALLATION OF THE HARDWARE ...................................................... 7
3. CONFIGURATION OF THE MODULE ........................................................ 8
Power to Trunk.................................................................................................. 8
Terrestrial path ................................................................................................. 8
dSCR Modes...................................................................................................... 8
4. TECHNICAL SPECIFICATIONS ............................................................. 9
5. SAFETY INSTRUCTIONS .................................................................. 11
6. CONDITIONS OF WARRANTY............................................................. 12

Digital SCR Multiswitch (Ref: dSCR 9743SH)
4
1. INTRODUCTION
Product description
The 9743SH products are designed to support a wide range of new and existing multiswitch
installations.
Each 9743SH unit has:
4 cascade-able LNB inputs from universal Quattro LNBF : VL HL VH HH
1 terrestrial trunk.
4 SCR/Legacy outputs
1 DC input.
Each output can support a wide variety of satellite receivers :
In legacy mode, the 9743SH outputs can be used as a standard multiswitch.
In SCR mode, each 9743SH output supports up to 8UBs with all versions of the
single cable technology. This includes OLT, SCR, CSS and EN50494.
As all outputs are independent, the installation can be a mix of legacy and SCR
connections.
The terrestrial part allows to support any service that operates below 1 GHz, which
includes terrestrial reception, cable and DOCSIS reception.
The trunks enable to cascade multiple products to support big installations of more than
100 households in MDU applications, like apartments, or more than 100 rooms in
hospitality environments, like hotels.
The DC power can be inserted at any product. In cascaded systems, multiple power
supplies might be needed. The Johansson reference for the power supply is 2460.

Digital SCR Multiswitch (Ref: dSCR 9743SH)
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Package contents
1x Digital SCR Multiswitch 9743SH
Mounting
A
B
9743SH
98 mm
179 mm

Digital SCR Multiswitch (Ref: dSCR 9743SH)
6
Typical application

Digital SCR Multiswitch (Ref: dSCR 9743SH)
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2. INSTALLATION OF THE HARDWARE
The optional power supply (ref 2460) can feed multiple multiswitches.
Ref.
Amount of products
per power supply
9743SH
4
All 4 LNB trunks should always be
cascaded or terminated with a DC-
blocked 75-Ohm terminator. All
unused SCR/Legacy outputs should
be terminated with a 75-Ohm
terminator for proper terrestrial
signals.
In this example 1 multiswitch is
installed per floor. Only 1 power
supplies is used to power the 2
multiswitches.

Digital SCR Multiswitch (Ref: dSCR 9743SH)
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3. CONFIGURATION OF THE MODULE
Power to Trunk
The cascaded system is powered by the trunks, this means that the trunks power both the
cascaded Digital SCR Multiswitches as well as the LNB and trunk amplifiers. Trunk power can
be inserted at the “DC Input” of 1 or more cascaded units.
This allows an efficient sharing of the power from multiple units and creates a natural backup
system.
DC pass-through on the trunks is foreseen for the 4 Sat trunks only (Terrestrial is DC blocked).
Terrestrial path
The Terrestrial trunk is passive and DOCSIS signals can pass through in both directions.
The Terrestrial trunk should always be terminated with a 75-Ohm terminator.
dSCR Modes:
SCR mode: Slow blinking GREEN
Legacy mode: Solid GREEN
The 9743SH can work in two modes on each output independently –SCR Mode and Legacy
Mode.
The default mode is Legacy Mode. The module will automatic switch from Legacy to SCR mode
upon the first DiSEqC command when a SCR set top box is connected. If SCR mode has been
activated, that specific output needs to be powered-off to go back to Legacy Mode.
SCR mode: status LED slow blinking green
When a compatible Set Top Box is connected and set in “SCR Mode” up to 8 User Bands can be
generated and can be tuned independent of each other to any LNB input and transponder.
The 9743SH is compatible with EN50494 CENELEC-standard. The set top box sends the desired
data for the LNB input and frequency selected in DiSEqC commands.
Legacy mode: status LED solid green
When a Legacy Set Top Box (non-SCR Compatible) is connected to any of the ports, the dSCR
works like a standard multiswitch allowing only one tuner to be connected to each output and
allowing the tuner to select a single band, polarity and frequency from the relevant
transponder using 13/18 V and 0/22 kHz tone switching.

Digital SCR Multiswitch (Ref: dSCR 9743SH)
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4. TECHNICAL SPECIFICATIONS
9743SH
Satellite
Operating Frequency
Range
950 –2150 MHz
Inputs
4
Outputs * (Trunk)
4
Max and Min Input
Txp Power Level
-35 to -5 dBm
Trunk lines in to out
gain
-2.5 (-1.5 Typical)
In to SCR out gain
-15 to +15 Typical, AGC controlled
In to legacy out gain
-15 to +15 Typical, AGC controlled
Return loss
>8
Terrestrial
Operating Frequency
Range
5 –862 MHz
Inputs
1
Outputs * (Trunk)
1
Trunk Lines in to out
-4 Typical
In to SCR out
-17 Typical
dSCR Output Ports
dSCR Output Ports
4
Supported Output
Modes
SCR + Legacy + DTT/DAB/FM
SCR Mode Indication
Multicolor/Flashing LED
SCR Output Power
per Txp
-23 dBm Min (-21 dBm Typical), AGC controlled
SCR channel
bandwidth
46 MHz
SCR User Bands
8
SCR Standard (auto
detect & switch)
CENELEC EN50494,
Universal LNB tone & volts
Legacy Output Power
per Txp
-23 dBm Min (-21 dBm Typical), AGC controlled
DiSEqC signaling
DiSEqC compliant
*: Unused ports needs to be terminated with 75 Ohm DC-blocked terminator

Digital SCR Multiswitch (Ref: dSCR 9743SH)
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DC Power
DC Power Connector
Unit can be powered via PWR port or trunk lines
(all F-types)
Power Indication
Green LED (front of unit)
Power Supply
Voltage
15 to 20 VDC
Max Power
consumption
SCR mode: 6W per pair of ports
DC from trunk lines
out to in
Yes (not for terrestrial trunk)
Supply current to
LNB
Yes
Short circuit
protection & power
on diagnostics
Yes
Ground tags
1
Operating
Temperature Range
-20 to +50 °C, Indoor housing
EN50494
UB
FREQ
1
1210
2
1420
3
1550
4
1680
5
1892
6
2040
7
1270
8
1330