AT 165
Series of Air Traffic Control
Mode A/C Digital Transponder

Plug and Play replacement modes for King KT76/78

AT165 TSO (KT76/78 Replacement herein referred to as the AT165) is a panel mounted unit designed to be a slide in replacement for existing KT76/78 installations. The AT165 provides all the features of the KT76/78 with additional enhancements.

The AT165 TSO is a panel-mounted transponder with additional altitude and timing functions. The AT165 consists of a receiver tuned to the frequency of a ground interrogation station (1030MHz), logic circuitry to check the validity of the received interrogation and encode a reply containing pertinent identification information, and a transmitter which sends the code reply to the ground station. When connected to an optimal Altitude Digitizer (AR850) coded altitude information will be transmitted to the ground station.

The AT165 utilizes a single knob for error free code entry even in turbulence. Push button controls are used to access and manipulate the added features. The front panel display has two distinct areas, one for the primary transponder functions and the second for the altitude and timing functions.

The AT165 has been designed for 14V or 28V operation. It the AT165 is replacing a KT76/78 that uses a passive voltage converter, the converter does not have to be removed.

Specifications:
Mechanical:
Installation Space - 6.25in x 1.63in x 10.0in
Weight - 1.81lbs
Receiver:
Frequency - 1030MHz
Sensitivity - Min. trigger level (MTL) -69 to -74 dBm
Side-Lobe Suppression (SLS) - 99% or greater for signals from 3 dB to 50 dB above MTL
Dynamic Range - Logarithmic pulse response 50 dB or greater about MTL
Bandwidth - -60dB at +/- 25MHz
Transmitter:
Frequency - 1090MHz
Pulse Power - 250 watts nominal, 190 watts minimum

Includes:
AT165 Unit
Allen Wrench
Installation Manual
Operation Manual

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