EXR 1541 - Digital decoder KATHREIN - Free user manual and instructions

Product type	Single-cable multiswitch for satellite distribution
Brand	Kathrein
Model	EXR 1541
Reference	20510048
Subscriber connections	1 x 4 (4 receivers)
Inputs	1 x terrestrial (5-862 MHz), 4 x Sat IF (950-2150 MHz)
Subscriber frequencies / SCR addresses	Receiver 1: 1284 MHz / 0; Receiver 2: 1400 MHz / 1; Receiver 3: 1516 MHz / 2; Receiver 4: 1632 MHz / 3
Power supply	Mains adapter NCF 18 (included), input 220-230 V~, output 18 V ---, max. 650 mA
Permissible supply voltage at subscriber output	10-14 V
Maximum switch consumption at 14 V	110 mA
Max. remote power supply current (via low horizontal input)	650 mA
Transmission attenuation (terrestrial path)	1 dB
Gain at subscriber connection (SAT)	-1 to +3 dB depending on frequency
Horizontal/vertical decoupling	≥ 30 dB
Dimensions (W x H x D)	112 x 148 x 44 mm
Weight (with NCF 18 adapter)	0.45 kg
Permissible ambient temperature	-20 to +55 °C
Connections	F connectors 75 Ω
Installation	Indoor, do not mount on ceiling; ventilation at least 5 cm on each side
Standards	Compliant with EN 50494 (SCR single-cable), EN 60728-11, EN 60065
Receiver compatibility	SCR single-cable compatible receivers according to EN 50494
Maintenance and cleaning	Disconnect the mains adapter before any intervention; do not expose to humidity; clean with a dry cloth
Safety	Do not open; surge protection recommended; equipotential bonding (Cu 4 mm² min.); do not place liquids on the adapter
Spare parts and repairability	NCF 18 mains adapter (ref. 20510046) available; standard F connectors; no user-serviceable parts

Frequently Asked Questions - EXR 1541 KATHREIN

What is the role of the EXR 1541 multiswitch?

The EXR 1541 is a single-cable multiswitch that distributes satellite signals (4 levels, HDTV) and terrestrial signals to 4 independent receivers, each able to freely select its program.

How to configure SCR frequencies on my receiver?

In your receiver's setup menu, assign a unique subscriber frequency for each outlet. The fixed frequencies are: outlet 1 (1284 MHz), outlet 2 (1400 MHz), outlet 3 (1516 MHz), outlet 4 (1632 MHz). Ensure no frequency is assigned twice.

What to do if the switch does not switch?

Check that the connection between the receiver and the switch is not short-circuited. Check the receiver settings (single-cable mode enabled). The operating voltage at the receiver output must not exceed 14 V.

Why is there no corresponding image after switching?

The single-cable frequency is probably misconfigured. Check the settings of all receivers: each frequency (1284, 1400, 1516, 1632 MHz) must be assigned to only one receiver.

Which mains adapter to use with the EXR 1541?

Use exclusively the provided NCF 18 adapter (ref. 20510046). It delivers 18 V --- and supports up to 650 mA. Using another adapter may damage the device.

Can I connect more than 4 receivers?

Yes, by cascading up to 8 multiswitches. Use for example an EXR 2541 (pass-through model) to extend the installation without losing SCR functionality.

What safety precautions should be taken?

Always disconnect the adapter before intervening. Install the device indoors, away from humidity. Maintain at least 5 cm ventilation around it. Do not mount on the ceiling. Use an equipotential bonding line (Cu 4 mm²).

What to do in case of overheating?

Check that air circulates freely around the device (5 cm on each side). The ambient temperature must not exceed +55 °C. If overheating persists, reduce the load or improve ventilation.

How to assign outlets to the highest frequencies?

It is recommended to assign outlets with the longest cable lengths to the highest frequencies (e.g., 1632 MHz for the longest outlet) to minimize losses.

Is the device compatible with terrestrial reception?

Yes, the terrestrial input (5-862 MHz) allows receiving DTT signals even when the satellite receiver is in standby. The attenuation on this path is 1 dB.

USER MANUAL EXR 1541 KATHREIN

• Cascadable single-cable multi-switch for distribution of digital Sat-IF signals (4 sat levels; including HDTV) and terrestrial signal for supplying 4 receivers in single-family households
  No restriction on the variety of channels - the complete range of channels from one satellite is transmitted
  Option to select horizontal/vertical, low band/high band and transponder independently from each receiver
  Changeovers horizontal/vertical, low band/high band and transponder selection is carried out in the multi-switch, controlled by the receiver with a special SCR single-cable command set to EN 50494
  For transponder selection special tuning modules called SCRs (Satellite Channel Routers) are incorporated in the single-cable multi-switch for conversion to the subscriber frequencies
  Each receiver is assigned a fixed subscriber frequency (a twin receiver requires two subscriber frequencies)
  The unit satisfies the SCR single-cable standard to EN 50494, i.e. all components of a single-cable system that satisfy this standard can be installed in a satellite system
  Terrestrial signals can be received even when the satellite receiver is switched off
  EXR 2541 single-cable multi-switches and loop-through multi-switches such as the EXR 2558 can be mixed in any combination. Up to 8 multi-switches can be connected in a cascade
  For indoor mounting

EXR 1541

Single-cable multi-switch with a connection for four receivers, NCF 18 power supply unit for the LNB supply
Low power consumption thanks to highly efficien, short-circuit protected switched-mode power supply unit and power-saving concept (the single-cable multi-switch is supplied by the receivers that are connected to it and is switched off when the receivers are switched off)
LNB remote feeding via the horizontal low input. All other inputs are voltage-free

EXR 2541

Single-cable multi-switch loop-through for system extension by a single-cable connection for four receivers

Installation and safety instructions

• The equipment described is designed solely for installation in satellite receiver systems.
• Any other use, or failure to comply with these instructions, will result in voiding of warranty cover.
• The equipment may only be installed in dry areas indoors. Do not mount it on or against easily flammable materials.
• The equipment must be provided with an equipotential bonding wire (Cu, at least 4 mm2).
• The safety regulations set out in the current EN 60728-11 and EN 60065 standards must be complied with.
  Fixings: Wood screws, max 0: 4.5 mm
• Connector: RF plug 75 Ω (series F) to EN 61169-24.
• In order to satisfy the EMC requirement, the only power supply unit that may be used for the EXR 1541 is the NCF 18.
• Unused RF connections must be terminated with 75 - resistors (such as EMK 03).

Current-carrying device NCF 18

• Do not open the unit or tamper with it!
• When working on the system always unplug the power supply unit from the wall socket!
• Ensure adequate clearance! Clearance all round at least 5 cm!
• The unit must not be mounted on the ceiling!
• Free circulation of air must be possible to discharge the heat emitted by the unit. Danger of overheating!
• Ambient temperature range -20 to +55°C

Caution:

• No liquid-filled items may be placed on top of the power supply unit.
• The power supply unit must not be exposed to dripping or splashing water.

• In order to disconnect the unit from the mains it is necessary to unplug it at the wall socket, which must therefore be easily accessible.

• An inner cable conductor diameter greater than 1.2mm , or the presence of burrs may damage the sockets on the unit.

Notes

• Particular care should be taken to assign each of the frequencies available at the output from the multi-switch to only a single receiver, otherwise the receivers will generate mutual interference.
  The frequencies are allocated on the receiver's setting menu.
• Depending on the type, this may be performed manually or automatically.

• It is recommended that the wall sockets with the shorter length connections are assigned to the higher frequencies.
• By definition the system is designed so that single-cable units are supplied with 14VDC
• The power supply is briefly switched to 18V DC if control signals similar to DiSEqC™ have to be transmitted. Continuous application of 18V would block the system. For this reason we recommend the use of ESU 33/34 sockets, which are equipped for switching off electronically.
  The receivers that are connected must be designed for single-cable operation to EN 50494.

System example (symbolic representation)

4 connections per living unit
* EMU 250 (5-way plug connector), BN 20510044 available as an option. Not supplied with the EXR 1541/2541
**) KAZ 11/KAZ 12 overvoltage protector

SCR single-cable commands for various programs

Programme BBC EIN	S EXTRA PRO 7 QVC
Sat IF level Vertical low Horizontal low Horizontal high Vertical high
	1847 MHz 994 MHz 1945 MHz 1952 MHz
	E0 10 5A .... E0 10 5A .... E0 10 5A .... E0 10 5A ....
SCR 0 (1284 MHz) 01	B1 08 DB 0D CA 05 CB
SCR 1 (1400 MHz)	21 CE 28 F8	2D E7 25 E8
SCR 2 (1516 MHz)	41 EB 49 15 4E 04	46 05
SCR 3 (1632 MHz)	62 08	69 32	6E 21	66 22

As at: Dec 2010 The following applies for the channels listed: SR-FEC 22000-5/6

Possible causes of faults, and their remedies

Problem	Possible cause:	Solution
Multi-switch fails to switch	No control signal from receiver, or incorrect control signal	Check that there are no short circuits in the connection from the receiver to the multi-switch. Check the menu settings of the receiver (in single-cable mode!). Operating voltage at the receiver output must not exceed 14 V
Multi-switch operates, but no associated picture appears	Incorrect input cable frequency	Check menu settings of all connected receivers. Check that frequencies are assigned to one receiver only

Technical Specification

Type EXR 1541 EXR 2541
Order no. 20510048 20510049
Subscriber connections 1 x 4 1 x 4
Inputs 1 x terrestrial 4 x sat-IF 1 x terrestrial 4 x sat-IF
Frequency range MHz 5-862 950-2150 5-862 950-2150
Through loss dB - 2.5		1.5
Connection loss (terrestrial)		dB	1	-	7	-
Gain to the subscriber connection (SAT)1		dB	-	-1 → 3	-	-1 → 3
Horizontal/vertical isolation		dB	-	30	-	30
Trunk decoupling		dB	-	-	-	40
Operational level		dBμV	-	85	-	85
Subscriber frequency/SCR address	Receiver 1	MHz	1284/0		1284/0
	Receiver 2		1400/1		1400/1
	Receiver 3		1516/2		1516/2
	Receiver 4		1632/3		1632/3
Permissible supply voltage at the subscriber output		V	10-14		10-14
Max. power consumption of multi-switch at 14 V		mA	110		110
Max. total remote feed current2)		mA	650		-
Max. remote feed current per trunk		mA	-		1000
Permissible ambient temperature		°C	-20 to +55 -20 to +55
Connections			F connectors		F connectors
Dimensions		mm	112 x 148 x 44		112 x 148 x 44
Packing unit/weight		pc./kg	1 (10)/0.45 (incl. NCF 18)		1 (10)/0.31

1) Frequency-dependent attenuation/gain (pre-emphasis); additional SCR 0: -1 dB, SCR 3: +2 dB
2) Via horizontal low input

Technical data for the NCF 18 power supply unit (only for EXR 1541)

Type		NCF 18
Order no.		20510046
Nominal input voltage	V~	220-230 (50/60 Hz)
Nominal input power at 10/150/650 mA load	W	1.6/4.7/14.5
Secondary voltage (short-circuit proof)	V ---	18
Nominal secondary voltage	mA ---	Max. 650
Protection class/protection type		II (double insulated)/IP 30
Permissible ambient temperature	°C	-20 to +55
DC connection		F connector
Dimensions	mm	55 x 80 x 75

Electronic equipment is not domestic waste - it must be disposed of properly in accordance with directive 2002/96/EC OF THE EUROPEAN PARLIAMENT AND THE COUNCIL dated 27th January 2003 concerning used electrical and electronic appliances. At the end of its service life, take this device for disposal at a designated public collection point.

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