R&S®ADMC8 Multicoupler

Active UHF multicoupler for 8-port ATC signal distribution

Key Facts

  • Suppression of adjacent signals from high-power transmitters
  • Band-selectivity in the UHF ATC frequency range
  • 1-to-8 distribution

Brief Description

The R&S®ADMC8 is a multicoupler specifically designed for Rohde & Schwarz ATC receivers.

The space-saving R&S®ADMC8 optimally supports typical ATC system installations with eight receivers operated in parallel on one antenna.

Features

  • Suppression of adjacent high-power signals
  • Integrated automatic emergency power
  • Reliable protection against large signals

Specifications

Standard frequency range 1) 225 MHz to 400 MHz
Impedance input/output 50 Ω

Key Facts

  • Suppression of adjacent signals from high-power transmitters
  • Band-selectivity in the UHF ATC frequency range
  • 1-to-8 distribution
  • Automatic emergency power switchover
  • Overvoltage protection
  • Floating alarm contact
  • Customized filter frequencies on request
  • Specifications in line with environmental data of the R&S®M3SR Series4400

Brief Description

The R&S®ADMC8 is a multicoupler specifically designed for Rohde & Schwarz ATC receivers.

The space-saving R&S®ADMC8 optimally supports typical ATC system installations with eight receivers operated in parallel on one antenna.

The intelligent switching concept of the R&S®ADMC8 multicoupler maximizes the operational reliability of the ATC receiving system by preventing a single point of failure in the amplifiers. To handle any interruptions in the AC supply voltage, the R&S®ADMC8 features automatic switchover to the DC input provided for emergency power supply. The internal operating state of theR&S®ADMC8 can be monitored and evaluated by R&S®Series4200 radios via an alarm contact.

Features & Benefits

Suppression of adjacent high-power signals

The R&S®ADMC8´s integrated bandpass filtering considerably improves the reception conditions for the connected receivers. Adjacent signals such as high-power FM signals in the VHF band or TV signals in the UHF band are suppressed. The R&S®ADMC8 is available as a UHF model. The R&S®ADMC-B1 option is offered for cases where customized filters are needed.

In ATC, parallel operation of eight receivers on one antenna is very common which is why the R&S®ADMC8 multicoupler has eight ports. To prevent the connected receivers from affecting each other (e.g. due to local oscillators or synthesizers), the multicoupler features high port-to-port isolation.

Integrated automatic emergency power

The R&S®ADMC8 is ideal for operation with either AC or DC power. The integrated electronic switchover mechanism automatically detects interruptions in the AC power supply and immediately switches to the DC supply without any signal interruption. The emergency power supply systems with 24 V DC voltage that are common in ATC can be used.

Reliable protection against large signals

The integrated protective circuits at the RF input protect the R&S®ADMC8 against large signals and reliably prevent damage to the connected receivers.

Remote monitoring through floating alarm contact

Featuring an integrated alarm contact as standard, the R&S®ADMC8 offers impressive capabilities for remote monitoring of the internal operating state. If a malfunction occurs, the R&S®ADMC8 immediately switches the floating contacts of a relay to indicate the modified operating state. All internal supply voltages of the amplifiers are monitored. In conjunction with R&S®Series4200 and R&S®Series4400 radios, this alarm contact offers the capability to automatically report the operating state of the R&S®ADMC8 to the user.

Specifications

Impedance input/output 50 Ω
RF input 1 × N female
VSWR input < 1.5:1, typ. 1.2:1
VHF FM band suppression 5-pole Chebyshev highpass filter referenced to 310 MHz < –17 dBr for f < 100 MHz
UHF band V suppression 5-pole Chebyshev lowpass filte rreferenced to 310 MHz < –17 dBr for 650 MHz < f < 1 GHz
Max. input power 15 dBm
RF outputs 8 × N female
VSWR output < 1.5:1, typ. 1.2:1
1 dB compression > 15 dBm, typ. 18 dBm
Decoupling between two outputs adjacent outputs > 23 dB, typ. 26 dB
non-adjacent outputs > 23 dB, typ. 30 dB
Intermodulation suppression IP3 output > 32 dBm, typ. 35 dBm
Gain 2 dB +2 dB/–1.5 dB
Noise figure < 7 dB, typ. 5 dB
Reverse decoupling > 33 dB, typ. 38 dB
Temperature operating temperature range –20 °C to +55 °C
storage temperature range –40 °C to +70 °C
Primary power supply AC 90 V to 250 V/50 Hz to 60 Hz; IEC connector
Energy consumption ≤ 8 W
Emergency power supply DC (fully automatic switchover) 19 V to 32 V, typ. 0.3 A
Alarm contact maximum switching current ≤ 1 A
maximum switching voltage ≤ 42 V
Connector type emergency power supply, alarm contact CA 6 GS (6+PE)
Electromagnetic compatibility EN 55011 class B and EN 61326
Humidity ≤ 95 % at +55 °C in line with MIL-STD-810F method 507.4 and DIN EN60068-2-30,+25 °C/+55 °C
Vibration 5 Hz to 55 Hz, 0.4 mm double amplitude, test period: 30 min. in each of three axes, in line with DIN EN 68-2-6
Shock 45 Hz to 2000 Hz, ≤ 40 g, three shock spectra in each of three axes, in line with DIN EN 68-2-27,MIL-STD-810D method 516.3 procedure I
Water and dust resistance IP 32 for front and side panel
Dimensions W × H × D 482.6 mm × 43.8 mm × 145 mm (19", 1 HU)(19.0 in × 1.7 in × 5.7 in)
Weight approx. 2.6 kg (5.7 lb)

1) Other frequency ranges on request.

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