Designed for communications between two or more simplex VHF/UHF military radios, their primary application is for UAV-borne communications relays, but they also have other uses including ground-based communications and rapid deployment tasks.
The units consist of two frequency translating signal channels with individually tuneable receive and transmit frequencies.
A type 1 transponder has a single channel that receives at a 313-325MHz and transmits at 235-245MHz.
In addition to a type 1 transponder, a type 2 transponder includes a second channel that receives at 235-245MHz and transmits at 313-325MHz.
The units are RF-transparent and are not limited by communications protocol encryption within the nominated channel bandwidth.
An on board controller governs which channel is active when a signal in either receive band is present.
The controller also dynamically updates the system noise floor throughout flight to aid in accurate signal detection and path switching.
The unit is software configurable either before a flight via a serial port or reconfigurable during flight via the serial port and the avionic radio link.
Reconfigurable parameters include receive and transmit frequencies, gain, timer settings and signal detection threshold setting.