TCN684 Tacan Ground Beacon

Additional information

The TCN684 TACAN is a wideband navigation aid system which provides range and bearing information. It is compatible with all existing Airborne TACAN interrogators.

The system is designed and manufactured to meet the requirements laid down in:

MIL-STD-291C
FAA-E-2828a
ICAO Annex 10
MIL-STD-810F

In addition, all devices, material and tests are in accordance with above standards.

Specification

TECHNICAL FEATURES
Feature	Specification
Accuracy	±30 m for Distance, ±1° for Bearing
Transmitter	Frequency Range: 962 MHz to 1213 MHz
	X - Channel Pulse Pair Spacing: 12 µs
	Y - Channel Pulse Pair Spacing: 30 µs
	Pulse Shape and Spectrum: According to MIL-STD-291B
	Peak Output Power: Max up to 5KW
	Reply Delay: 50 µs nominal in X mode, 56-74 µs Programmable in Y mode
	Reply Delay Stabilization: ± 0.05 µs
Receiver	Transponder Reply Efficiency: > 63%
	Receiver Frequency Range: 1025 MHz to 1150 MHz
	Receiver Dynamic Range: 80 dB
	Receiver Sensitivity: -92 dBm for 70% Reply Efficiency
Antenna	Antenna Gain: 5.0 dBi at beam maximum averaged with TACAN modulation
	Antenna Azimuth Coverage: Omni-directional with 9 lobe cardioids shape pattern
	Azimuth Modulation: -2° to +40°
	Antenna Polarization: Vertical
	VSWR: Less than 1.8 with respect to 50 ohm input
	Power Rating: 6KW input power with 4% duty cycle
	Elevation Coverage: -2° to 40°
	➤ Slope at horizon 1.7 dB/degree
	➤ Peak gain approx. 3°
	➤ Side lobes below -16 dB relative to peak