R&S®ATCMC8 Air Traffic Control Multicoupler

Active 8-port VHF/UHF signal distribution

Key Facts

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

Brief Description

The R&S®ATCMC8 is a multicoupler specifically designed for ATC receivers from Rohde & Schwarz. The R&S®ATCMC8 saves space while optimally supporting conventional ATC system installations by means of eight receivers operated in parallel on one antenna.

Features

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

Specifications

Standard frequency range 112 MHz to 144 MHz
Impedance input/output 50 Ω

Key Facts

  • Suppression of adjacent signals from high-power transmitters
  • Band-selective in the VHF or UHF ATC frequency range
  • 1-to-8 distribution
  • Automatic emergency power switchover
  • Overvoltage protection
  • Floating alarm contact

Brief Description

The R&S®ATCMC8 is a multicoupler specifically designed for ATC receivers from Rohde & Schwarz. The R&S®ATCMC8 saves space while optimally supporting conventional ATC system installations by means of eight receivers operated in parallel on one antenna.

Alternatively, the R&S®ATCMC16 multicoupler features simultaneous signal distribution to up to 16 receivers.

The multicoupler's integrated, steep-sided filters reliably suppress interference from high-power VHF and TV signals.

Features & Benefits

Suppression of adjacent high-power signals

The integrated bandpass filtering of the R&S®ATCMC8 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. To offer optimized filtering for any application, the R&S®ATCMC8 is available as either a VHF or a UHF model. In addition, Rohde & Schwarz offers various options with different filter characteristics for the R&S®ATCMC8.

Available as 1-to-8 or 1-to-16 model

In ATC, the parallel operation of eight or 16 receivers on one antenna each is very common. The R&S®ATCMC multicoupler family can easily handle this challenge and is therefore available as either an 8- or 16-port model. To prevent the connected receivers from affecting each other (e.g. due to local oscillators and synthesizers), both models feature high port-to-port isolation.

Integrated automatic emergency power switchover

The R&S®ATCMC8 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®ATCMC8 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®ATCMC multicoupler family offers impressive capabilities for the remote monitoring of the internal operating state. If a malfunction occurs, the R&S®ATCMC8 immediately switches the floating contacts of a relay in order to indicate the modified operating state. All internal supply voltages of the amplifiers are monitored. In conjunction with R&S®Series 4200 radios, this alarm contact offers the capability to automatically report the operating state of the R&S®ATCMC8 to the user.

Specifications

R&S®ATCMC8 VHF
Standard frequency range1)   112 MHz to 144 MHz
Impedance input/output 50 Ω
RF input 1 x N female
VSWR input <1.5:1, 1.2:1 (typ.)
VHF FM band suppression 7-pole elliptical highpass filter referenced to 127 MHz <-25 dBr for f < 103 MHz
  Option B2 –25 dBr for f < 108 MHz
UHF TV band suppression 3-pole Chebyshev lowpass filter referenced to 127 MHz <-30 dBr for 470 MHz < f < 1 GHz
  Option B1 <-25 dBr for 185 MHz < f < 1 GHz
  Option B2 <-25 dBr for 470 MHz < f < 1 GHz
Max. input power   +15 dBm
RF outputs 8 x N female
VSWR output <1.5:1, 1.2:1 (typ.)
1 dB compression   >+15 dBm, +19 dBm (typ.)
Decoupling between two outputs   >27 dB, 34 dB (typ.)
Intermodulation suppression IP3 output >+33 dBm, +36 dBm (typ.)
Gain   2 dB ± 1.5 dB
Noise figure   <7 dB, 4.5 dB (typ.)
Reverse decoupling   >34 dB, 38 dB (typ.)
R&S®ATCMC8 UHF
Standard frequency range1)   225 MHz to 400 MHz
Impedance input/output 50 Ω
RF input 1 x 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
  Option B12, B16, B18 <-17 dBr for f < 50 MHz
  Option B3 <-25 dBr for f < 200 MHz
UHF TV band suppression 5-pole Chebyshev lowpass filter
referenced to 310 MHz
<-17 dBr for 650 MHz < f < 1 GHz
  Option B16, B18 <-17 dBr for 850 MHz < f < 1 GHz
  Option B3 <-25 dBr for 500 MHz < f < 1 GHz
Max. input power   +15 dBm
RF outputs 8 x N female
VSWR output <1.5:1, 1.2:1 (typ.)
1 dB compression   >+15 dBm, +18 dBm (typ.)
Decoupling between two outputs directly adjacent >23 dB, 26 dB (typ.)
  not directly adjacent >23 dB, 30 dB (typ.)
Intermodulation suppression IP3 output >+32 dBm, +35 dBm (typ.)
  Option B14 >+32 dBm, +44 dBm (typ.)
Gain   2 dB + 2 dB/-1.5 dB
  Option B14 5 dB ± 1.5 dB
Noise figure   <7 dB, 5 dB (typ.)
Reverse decoupling   >33 dB, 38 dB (typ.)
General data
Dimensions (W × H × D)   482.6 mm × 43.8 mm × 145 mm
(19 in × 1.72 in × 5.71 in) (19", 1 HU)
Temperature operating temperature range –20°C to +55°C
  storage temperature range –40°C to +70°C
Weight   approx. 2.6 kg (approx. 5.73 lb)
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, 0.3 A (typ.)
Alarm contact maximum switching current ≤1 A
  maximum switching voltage ≤42 V
Connector type emergency power supply, alarm contacts CA 6 GS (6+PE)
Electromagnetic compatibility   EN55011 class B and EN61326

1) Other frequency ranges on request.

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