R&S®ASDU02 Antenna Signal Distribution Unit

Active multicoupler for antenna signal distribution

  • Overview

Key Facts

  • Active multicoupler for antenna signal distribution
  • Signal reception via modules in the HF and VHF/UHF bands
  • Space-saving with only 1 HU

Brief Description

The R&S®ASDU02 is an active multicoupler for distributing signals from one antenna to multiple receivers.

Features

  • Optimized HF and VHF/UHF modules for best possible receiving conditions
  • 1-to-4 distribution in each module without any loss in level

Specifications

Impedance - input/output Frequency range
50 Ω 0.01 MHz to 30 MHz

Key Facts

  • Active multicoupler for antenna signal distribution
  • Signal reception via modules in the HF and VHF/UHF bands
  • Space-saving with only 1 HU

Brief Description

The R&S®ASDU02 is an active multicoupler for distributing signals from one antenna to multiple receivers.

Features & Benefits

Optimized HF and VHF/UHF modules for best possible receiving conditions

To create ideal receiving conditions, two multicoupler modules have been developed for the R&S®ASDU02. The HF module covers the 10 kHz to 30 MHz band, the VHF/UHF module covers the 20 MHz to 3 GHz band.

1-to-4 distribution in each module without any loss in level

Each multicoupler module first amplifies the signal at the antenna input by using broadband low-noise amplifiers with wide dynamic range. As a result, the distributed input signal is made available at the four outputs of the multicoupler module without any loss in level. All inputs and outputs have N female connectors.

Amplifiers with wide dynamic range

The broadband amplifiers in the multicoupler modules have an extremely wide dynamic range. They can linearly amplify exceptionally weak signals, even if they occur directly next to signals with extremely strong levels. This makes the R&S®ASDU02 ideal for use in radiomonitoring applications.

High port-to-port isolation

The modules feature high port-to-port isolation to prevent the connected receivers from affecting each other, e.g. via local oscillators or synthesizers.

BITE option for device monitoring

The BITE option allows the hardware status of the two multicouplers to be monitored. The internal voltages of the modules and the power supply unit are also measured. As an additional highlight, the operating points of the broadband amplifiers are monitored.

The measurement results of the BITE option are output on the rear of the device via one Ethernet interface (TCP/IP) per module. All relevant data is always available in realtime. The device is also controlled via the Ethernet interface.

The interface is installed and configured using an intuitive program. With the BITE option, the R&S®ASDU02 can be easily integrated into existing systems.

Combination of modules in robust 19" enclosure

The stable enclosure accommodates two multicoupler modules. The modules’ inputs are protected against overvoltages. Occupying only one height unit, the R&S®ASDU02 saves space in any rack.

Specifications

Module-specific data
HF multicoupler module
Frequency range   0.01 MHz to 30 MHz
Impedance input/output 50 Ω
Connectors 1 × antenna input, 4 × receiver output N female
Gain f > 0.025 MHz 3.0 dB ± 2.5 dB
Noise figure   < 8.0 dB, typ. 7 dB
Second-order intercept point (SOI) (output) f > 1 MHz > 67 dBm, typ. 75 dBm
Third-order intercept point (TOI) (output) f > 1 MHz > 35 dBm, typ. 43 dBm
1 dB compression   > 18 dBm, typ. 22 dBm
Decoupling between two outputs f > 1 MHz 26 dB, typ. 30 dB
Decoupling between output and input f > 1 MHz 30 dB, typ. 35 dB
Maximum input level (CW)   20 dBm
Protective circuit at signal input   0.5 kV in line with EN 61000-4-5
VHF/UHF multicoupler module
Frequency range   20 MHz to 3000 MHz
Impedance input/output 50 Ω
Connectors 1 × antenna input, 4 × receiver output N female
Gain   3.0 dB ± 2.5 dB
Noise figure   < 8.5 dB, typ. 7.5 dB
Second-order intercept point (SOI) (output) 20 MHz to 1 GHz > 45 dBm, typ. 56 dBm
  1 GHz to 3 GHz > 37 dBm
Third-order intercept point (TOI) (output) typ. 1 GHz > 21 dBm, typ. 25 dBm
  typ. 2 GHz > 17 dBm, typ. 19 dBm
  typ. 3 GHz > 14 dBm, typ. 15 dBm
1 dB compression   8 dBm, typ. 10 dBm
Decoupling between two outputs   > 35 dB, typ. 43 dB
Decoupling between output and input   > 55 dB, typ. 65 dB
Max. input level (CW)   20 dBm
Protective circuit at signal input   0.5 kV in line with EN 61000-4-5
General data
Temperature range operating temperature range –10 °C to +55 °C
  storage temperature range –40 °C to +70 °C
Power consumption   22 W
Input voltage   24 V ± 3 V DC
DC voltage connector   XLR
MTBF   > 60 000 h
MTTR   0.5 h
Electromagnetic compatibility   EMC Directive 2004/108/EC in line with EN61326
Electrical safety   in line with EN 61010 part 1
Dimensions W × H × D 483 mm × 45 mm × 270 mm
(19.02 in × 1.77 in × 10.63 in), 19", 1 HU
Weight with two multicoupler modules 3 kg (6.61 lb)

Slight variation of performance features at frequencies below 500 kHz.

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