MKR3300

Remote Marker Receiver

The MKR3300 Remote Marker Receiver is a compact, lightweight, and reliable solution for detecting ILS and airway marker beacons on 75 MHz. Designed for both VFR and IFR operations, it features an analog output, HI/LO threshold switch, and EASA certification. Ideal for completing glass cockpit installations with minimal installation effort.

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  • Compact and lightweight
  • Low installation effort
  • Ideal to complete Glass cockpit installations

Self-contained, reliable and field-proven.The MKR3300 Marker Receiver detects ILS beacons as well as airway marker beacons for VFR and IFR operations on rotary and fixed wing aircraft.

The MKR3300 Marker Receiver receives and converts marker signals (Outer, middle and inner ILS beacons as well as airway marker beacons) transmitted on the fixed frequency of 75 MHz
The unit is designed as a self-contained plug-in receiver. It is controlled by an open collector output with marker indicator lamps separately mounted in the panel or by EFIS systems. The HI/LO switch provides the receiver threshold to support IFR installations.
The unit responds to the latest EASA requirements and the needs of the industry.

Features

  • Analogue output
  • HI/LO switch
  • Fulfill IFR requirements
  • EASA Certified
Category Specifications
Receiver Type Tuned Radio Frequency Receiver (TRF)
Frequency 75 MHz
Sensitivity 200 μV – 10 mV EMK adjustable via HI/LO switch positions
Normal settings:
– HI: 200 μV (receiver threshold)
– LO: 1 mV (receiver threshold)
Bandwidth 6 dB ≥ ± 10 kHz
AGC ≤ ± 10 dB from receiver threshold to 50 mV EMK
Audio Output 100 mW = 5.5 V at 300 Ω with Ue 2mV HI / 95% mod. 1300 Hz
Balanced output ungrounded
Supply Voltage 18 V … 32 V DC
Current Consumption at 27.5 V DC ≤ 200 mA
Operating Temperature Range -40° C … +55° C
Short time: +70° C
Internal Fuse 1 A
Recommended External Fuse 1 A
External Marker Lamps Max. 100 mA / lamp
External HI/LO Switch Active GND: LO
Open: HI
Dimensions (L × W × H) 133 mm × 59.8 mm × 97.4 mm
Weight (with Mounting Plate) 350 g
Max. Operating Altitude 50,000 ft