Digital ADF RA3502

for aircraft

Compact and lightweight design No forced cooling No ventilation slots Field-proven reliability Robust and maintenance-free design Highly reliable and field-proven, the ADF3500 direction finding systems are trusted by the most reputed aircraft manufacturers. Suited for rotary and fixed wing applications, the ADF3500 can be operated either in a standalone fashion or within EFIS, FMS or integrated flight deck systems. The ADF 3502-() Receiver is designed for professional applications in the frequency range 190.0 kHz to 1799.5 kHz. The system is ideally suited for installations where minimum space is available. The small, lightweight control unit CU 5502 fits into a standard 2 ¼” (57mm) round instrument cutout and is only 2 ½” deep. The ADF Receiver can be installed at any convenient place in the aircraft. The RS 422 interface between CU and Rx reduces inter-wiring. The control unit CU 5502 offers a clear, high contrast, double line display, which is readable under all lighting conditions, even in bright sunlight. The frequency can be selected in 0.5 kHz/1kHz, 10 kHz/100 kHz steps by using variable speed frequency control. The pre-selection in the channel memory of the preset display allows instant switchover by pushing a “Flip-Flop” key to a new NDB en-route for indication of the cross bearing for a position fix relatively to a second NDB. The output of the receiver is compatible with indicator ID 3502 and the converter AC 5303/04 for RMI. The ADF 3500 system features an extensive automatic self-test function. After switch-on, the microprocessor and the frequency synthesizer are thoroughly checked by a test subroutine.