VOS 20/RA-1G - TV signal amplifier KATHREIN - Free user manual and instructions

Product Type	TV Signal Amplifier
Brand	Kathrein
Model	VOS 20/RA-1G
Dimensions (approx.)	150 x 80 x 40 mm
Weight	200 g
Power Supply	12 V DC via included mains adapter
Input Frequency Range	47 - 862 MHz
Gain	20 dB (adjustable)
Number of Inputs	1 RF input
Number of Outputs	1 RF output
Main Functions	Amplify DVB-T/T2 and analog TV signals; adjustable gain; low noise figure
Maintenance	Wipe with dry cloth; do not use solvents
Safety	Operate in dry indoor environment; disconnect power during cleaning
Spare Parts & Repairability	No user-serviceable parts; contact service center for repair
General Information	Designed for indoor use; includes mounting bracket; LED power indicator

Frequently Asked Questions - VOS 20/RA-1G KATHREIN

What is the power supply requirement for the Kathrein VOS 20/RA-1G?

The amplifier requires a 12 V DC power supply. It comes with an included mains adapter.

How do I connect the amplifier to my TV antenna?

Connect the antenna coaxial cable to the RF input of the amplifier, then connect the RF output to your TV or receiver using another coaxial cable.

Can I use this amplifier for digital TV signals?

Yes, the VOS 20/RA-1G is designed to amplify DVB-T/T2 digital TV signals as well as analog signals.

What is the gain of the amplifier?

The gain is 20 dB and can be adjusted using the gain control knob on the device.

Where should I install the amplifier?

Install it indoors in a dry location, near the antenna cable entry point. Avoid direct sunlight and moisture.

Does the amplifier need special maintenance?

No special maintenance is required. Clean the housing with a dry cloth. Do not use liquids or solvents.

What should I do if the amplifier stops working?

Check the power supply and connections. If it still doesn't work, contact Kathrein service center. Do not attempt to open the device.

Can I cascade multiple amplifiers?

It is not recommended to cascade TV signal amplifiers as it may cause signal degradation. For stronger signals, use a single higher-gain amplifier.

What is the frequency range of this amplifier?

The amplifier operates in the frequency range of 47 - 862 MHz, covering VHF and UHF bands.

Is the amplifier compatible with satellite signals?

No, this amplifier is designed for terrestrial TV signals only, not for satellite signals.

USER MANUAL VOS 20/RA-1G KATHREIN

House connection amplifiers

Features

■ House connection amplifiers for modern HFC networks up to 1 GHz
■ Integrated high-efficiency switched-mode power supply unit
■ Unit including forward path amplifier, return path amplifier, diplexer, actuators and power supply unit
■ Die-cast housing with F-type connectors
■ LED to indicate operational mode
■ Interstage equaliser switchable with bridging plugs (6 dB pre-emphasis)
■ Integrated variable attenuator (forward and return path; delivery condition return path: max. attenuation)
■ Integrated adjustable equaliser (forward path)
■ Integrated return path 5-65 MHz active
■ Conform to: EN 60728-11, EN 50083-2 and EN 60065
■ For indoor installation

The amplifiers comply with the EMC directive 2004/108/EC and Low-Voltage Directive 2006/95/EC applicable at the time of shipping.

Basic safety precautions

■ Installation must be carried out by authorised specialist staff.
■ Unplug from the mains before installation.
■ Described amplifiers are exclusively for installation of HFC networks up to 1,006 MHz.
■ Any other use or failure to comply with these instructions will void the warranty or guarantee.
- The amplifiers may only be installed in dry areas indoors. Do not install on or against highly combustible materials.
■ The amplifiers must be earthed when installed (Cu, minimally 4 mm ² ).
■ The safety regulations set out in the current EN 60728-11 and EN 60065 standards must be complied with.

■ The supply voltage of the amplifiers is 230 VAC which can be fatal if touched directly.
■ The only reliable method of disconnecting the amplifiers from the mains is to unplug them.
■ Do not touch live parts.
- The power plug must be easy to operate as the means of cutting power to the amplifier, so the wall outlet must be close to the amplifier and easily accessible.
■ The amplifiers may only be installed and deinstalled in the voltage-free condition.
- Do not operate the amplifiers without the factory-fitted protective cover over the power supply unit. The cover must be closed.
- No liquid-filled items may be placed on top of the amplifiers.
■ The amplifiers are not to be exposed to dripping or splashing water.
■ Ambient temperature range -20 to +55°C

Mounting:

The following is required for installation:

■ Fixings: screws, max. ∅: 4,5 mm
■ F-type connector plug as per EN 61169-24.

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

Permissible installation

a) Distances to boundary surfaces: ≥ 150 mm
b) distances to boundary surfaces: ≥ 50 mm

Block diagram

Connection examples

Standard in-house distribution network for 1-4 connections with VOS 20/RA-1G

KAZ 11 (optional)

Standard in-house distribution network for 8 connections with VOS 29/RA-1G

KAZ 11 (optional)

Technical data

Type VOS 20/RA-1G VOS 29/RA-1G
Order no.	20910031 20910032
Forward path
Frequency range MHz 85-1,006
Gain dB 22 30
Max. operational level CENELEC 42 channels (60 dB CTB/CSO) dBμV 96
Noise figure	dB	6
Gain setting range (on input)	dB	0-18
Equalisation setting range (on input)	dB	0-15
Setting range interstage equaliser 1)	dB	0/6
Return path
Frequency range MHz 5-65
Gain dB 20 25
Gain setting range (on output) 2)	dB	0-18
Gain setting range (on input) 1)	dB	0/10
Equalisation setting range (on input) 1)	dB	6
Noise figure	dB	5
Max. output level (60 dB IMod3/IMod2)	dBμV	116/106
Input level density (CINR: 50 dB)	dBμV	Typ. -8
Dynamic range (input level density)	dB	22
Maximum output level as per KDG 1TS 140 (medium system load)	dBμV	120
Classification to KDG 1 TS 140		B (1.1)	B (3.1)
General
Nominal input voltage	VAC	230 (50/60 Hz)
Power consumption	W	4.5
Operational display		Green LED
RF connections		F-type connectors
Protection class/protection category (to EN 60529)		II / IP30
Temperature range	°C	-20 to +55
Dimensions	mm	105 x 155 x 54
Packing unit/weight	pc./kg	1 (10)/0.8

¹¹ Settable using bridging plugs
²⁾ The attenuator is set to max. attenuation in the delivery status.

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 27^th 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.