|Dimensions:||5.35"H x 2.44"W x 15.0"D||Weight:||2.7 lbs. (2 ch.); 3.2 (5 ch.)|
|Voltager:||28VDC||Current:||2 channels - 320MA 5 channels - 360MA|
|Temperature:||-40 to +60C||Environmental:||DO-160A Cat. F1AOE1XXXXXXAAAA|
|TSO:||C59||Construction:||Solid state, modular|
|Input Impedance:||10k ohms, transformer coupled||Input Level:||0.1 volts rms min each tone 3.2 volts rms max each tone|
|Audio Response:||Flat from 300-3000 Hz||Tone Codes:||All 16 ARINC tones|
|Part Number||Selcal Decoder Description:|
|2800-0012-102||2 Channel Version|
|2800-0012-105||5 Channel Version|
Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact email@example.com
Selective Calling or SELCAL is a technique by which an aircraft has a unique identifier and a ground station can contact the aircraft for communication. This eliminates the aircraft crew from monitoring the HF frequencies on a regular basis and the subsequent background noise as a result.
The High Frequency Communications system (HF) must have SELCAL capability to process the ground station contact and alert the crew through audio or visual means. One of the components in the SELCAL system is a decoder. The decoder allows a ground station equipped with tone encoding equipment to call the specific aircraft by transmitting 2 pairs of assigned audio tones. The decoder is set to respond to the specific code assignment set on the front of the decoder. Upon reception of the tone code, the decoder signals the HF system that a message is waiting through audio or visual means.
Decoders are available in remote and panel mount variations. Some decoders may have the ability to monitor as few as 2 communication radios or up to 5 simultaneously.