R&S®MLx Multichannel Low-Power Transmitter

Flexible last-mile solution for digital TV networks

  • Overview

Key Facts

  • Multitransmitter system for transmitters, gap fillers and retransmitters
  • Cost-saving, compact solution for closing the last gaps in DVB‑T and DVB‑T2 broadcast networks
  • Highly flexible system providing custom-tailored solutions

Brief Description

The highly flexible R&S®MLx UHF multichannel lowpower transmitter system addresses a wide range of applications. It combines transmitter, transposer, gap filler and retransmitter functionality in a single, extremely compact unit and makes low demands on the surrounding infrastructure.

Features

  • A transmitter for challenging applications
  • Outstanding system flexibility
  • Easy to operate in any configuration

Specifications

Frequency range
UHF band IV/V 470 MHz to 862 MHz

Key Facts

  • Multitransmitter system for transmitters, gap fillers and retransmitters
  • Cost-saving, compact solution for closing the last gaps in DVB‑T and DVB‑T2 broadcast networks
  • Highly flexible system providing custom-tailored solutions
  • MultiTX system with transmitters of different output powers in a single subrack
  • Ideal for use in environments with limited infrastructure

Brief Description

The highly flexible R&S®MLx UHF multichannel lowpower transmitter system addresses a wide range of applications. It combines transmitter, transposer, gap filler and retransmitter functionality in a single, extremely compact unit and makes low demands on the surrounding infrastructure. This provides network operators with a high degree of freedom in selecting suitable sites and keeps operating costs down.

The highly flexible R&S®MLx transmitter system accommodates up to six channel modules with different output powers in a five HU, 19” subrack. Operators can choose between three module types for each channel: transmitter, gap filler or retransmitter, with output powers of 1 W, 5 W and 10 W, for the DVB-T/DVB-H and DVB-T2 digital TV standards.

The new transmitter system is an excellent solution to bridge the last mile in digital TV networks. With its low demands on broadcasting and IT infrastructures and minimal space requirements, the system is ideal for use in environments that do not provide a typical transmitter site infrastructure. The system can be enhanced to receive transport streams via satellite and to connect to a network management system via UMTS to make it perfectly match the conditions of a specific site.

Features & Benefits

  • A transmitter for challenging applications
    • Highly flexible applications, even beyond typical transmitter site scenarios
    • Transport stream feed via satellite
  • Outstanding system flexibility
    • Modular system concept for optimum adaptation to user requirements
    • Transmitters and gap fillers in a single product family
    • MultiTX system – multiple transmitters with different output powers in a single rack
    • Flexible redundancy concept: more than simply N+1
  • Easy to operate in any configuration
    • Central control of all components
    • Easy, efficient operation

Specifications

Frequency range
UHF band IV/V 470 MHz to 862 MHz
Transmitter module
Available standards DVB-T2, DVB-T, DVB-H
Supported network types MFN, SFN
Channel bandwidths 6/7/8 MHz
Inputs 2 × ASI (BNC 75 Ω)
optionally 2 × IP (Ethernet)
Gap filler module
Available standards DVB-T2, DVB-T, DVB-H, DTMB
Supported network types MFN, SFN
Channel bandwidths 8 MHz
Input 1 × RF (BNC 50 Ω)
Echo cancellation - standard echo cancellation
   echo gain +10 dB (max.)
   echo suppression > 20 dB (below signal level)
Echo cancellation - enhanced echo cancellation
   echo gain +24 dB (max.)
   echo suppression > 35 dB (below signal level)
Retransmitter module
Available standards DVB-T, DVB-H
Supported network type MFN
Channel bandwidths 6/7/8 MHz
Input 1 × RF (BNC 50 Ω)
RF output connector
  1 × BNC 50 Ω (for 1 W and 5 W modules)
1 × N 50 Ω (for 10 W modules)
Power supply
Supply voltage 200 V to 260 V AC
AC supply frequency 50 Hz or 60 Hz
Environmental conditions
Operating temperature range +1 °C to +45 °C
Relative humidity (max.) 95 %, noncondensing
Immunity
  to harmonic currents in line with EN 61000-3-2
to surges in line with EN 61000-4-5; < 1 kV (L-N),
< 2 kV (L-PE)
to voltage variations in line with EN 61000-4-11
Synchronization
Reference frequency 10 MHz, -15 dBm to +10 dBm, BNC
Reference pulse 1 Hz, TTL (0 V to 5 V), BNC
Operation
Local control via web interface (Ethernet port)
Remote control via web interface (Ethernet port)
Remote control optionally via SNMP (Ethernet)
Remote control optionally via UMTS modem (GSM, GPRS, UMTS, HSDPA)
Dimensions
W × H × D 483 mm (19") × 222 mm (5 HU) × 250 mm
(19 in × 8.7 in × 9.8 in)

To comply with the applicable standards and limit values for the suppression of out-of-band emissions (and in the case of digital standards, also for maintaining the required shoulder distance), the transmitter may only be operated with suitable filters at the RF output.

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