The automatic direction finder (ADF) DF 2000 is intended for the bearing of aircraft (during the operation of on-board radiostation transmitter) via 2—16 frequency channels (depends on a delivered conguration).
SYSTEM CONFIGURATION & FUNCTIONS
The ADF provides bearing of AM-modulated VHF signals using a phase method. The ADF utilizes electric switching of array vibrators (adcock antenna), which causes the rotation of one vibrator. The ADF consists of: processing rack, antenna system, antenna with a test generator, remote control and monitoring equipment, and a shelter with a life-support system.
FEATURES
Frequency range
118–137 MHz
Frequency spacing
25 kHz; 8.33 kHz
Modulation type of the direction finding signal
AM
Modulation depth, at most
≤ 80 %
Number of channels operating simultaneously
2—16 depending upon configuration
Direction finding sensitivity by each channel, at most
≤ 3 мкВ/м
Root-mean-square error of direction finding, at most
≤1°
DIRECTION FINDING DISTANCE AT HEIGHT, AT LEAST:
(150 ± 50) m
≥45 km
(300 ± 50) m
≥65 km
(1000 ± 50) m
≥120 km
(3000 ± 50) m
≥200 km
(10 000 ± 50) m
≥360 km