The HHKJ2000-YKA is a remote control unit designed for civil aviation air traffic control (ATC) applications, providing operators with a local or remote interface to VHF transceivers used for tower and en-route communications. In local mode, the unit connects directly to a VHF transceiver for short-distance control; in remote mode, it interfaces via an HKADP audio distribution unit and PCM transmission equipment to control transceivers at distant sites. Housed in a quarter-19-inch 3U chassis measuring 100 × 132 × 175 mm and weighing under 1 kg, the HHKJ2000-YKA is built for integration into standard ATC console racks.

What audio performance does the HHKJ2000-YKA deliver?

In transmit mode, the unit outputs a line-level audio signal adjustable from -16 dBm to 0 dBm into a 600 Ω balanced line, with total harmonic distortion held to ≤2%. The audio frequency response is flat within ±2 dB across the 300 Hz to 3.4 kHz voice band relative to a 1 kHz reference — meeting the spectral requirements for intelligible AM voice communication in the VHF aeronautical band (118-137 MHz). In receive mode, the unit accepts line-level inputs from -16 dBm to 0 dBm at 600 Ω with ≤3% distortion, and drives an internal speaker at ≥0.5 W into an 8 Ω load for local monitoring.

What environmental conditions is the HHKJ2000-YKA rated for?

The unit operates over an ambient temperature range of 20°C to +65°C and can be stored from -40°C to +85°C, making it suitable for uncontrolled equipment rooms and outdoor shelter installations at remote transmitter sites. The wide operating range accommodates the thermal conditions found in non-air-conditioned tower equipment rooms and outdoor communication shelters across diverse climate zones.