AN/ARC-201 Airborne VHF/FM SINCGARS
The AN/ARC-201 is part of the Single-channel Ground and Airborne Radio System (SINCGARS) family and is an FM frequency hopping aircraft used primarily by the Army for use in helicopters, light observation planes and fighters.
The Army Single-channel Ground and Airborne Radio System (SINCGARS) operates in the 30.0 to 87.975 MHz frequency range. Early ground versions of SINCGARS consist of a receiver-transmitter (RT-1439) supported by external COMSEC equipment assembled with other common modules into manpack and vehicular configurations. These radios are known as non-integrated COMSEC (non-ICOM) since they require the TSEC/KY-57 security equipment for cipher text (CT) operation.
The Army airborne SINCGARS radio requires the use of the TSEC/KY-58 security equipment for CT operation. All three versions of the airborne radio handle voice; only the data bus version (RT-1478) handles data through use of a data rate adapter (DRA). Both ICOM and non-ICOM versions of the radio are operationally compatible in FH and CT operations.
The system has a frequency range of 30-88 MHz and a channel bandwidth of 25 kHz (2320 channels).
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