1-9. DESCRIPTION OF MAJOR COMPONENTS. Continued
The Radio Receiver-Transmitters (RTs) are two-way FM radios. They can be loaded with eight single channel
(SC) and six frequency hopping (FH) presets. The system connector and auxiliary connector link the RT to the
aircraft system and to other radio set components. For retransmit operation, two RTs are connected via their
system connectors. An ECCM fill device is connected to the FILL connector to load data needed for FH opera-
tion. There are connectors for a communications antenna and two homing antennas. In the HOM (homing)
mode, a homing indicator is driven from the system connector. Using the homing indicator, the pilot can steer to
an FM transmitter. The RT does not require adjustment, alignment, or calibration. Self-test is provided for diag-
nostic use. There are three types of RT installations:
a. Panel RT. The panel RTs have all user controls on the RT front panel. RT-1476 is used in the
ARC-201(V) radio set, RT-1476A used in the ARC-201A(V).
b. Remote RT. The RT-1477 must be used with a Radio Set Control C-11466/ARC-201 (V). The RT-1477A
must be used with a Radio Set Control C-11466A/ARC-201A(V). The RT is mounted remotely from the operator
on a Mounting Base, Electrical Equipment MT-6373/ARC-201(V) or MT-6374/ARC-201(V).
c. Bus RT. These (RT-1478 or RT-1478A) must be used with the aircraft MlL-STD-l553B bus controller.
The RT is mounted remotely from the operator on a Mounting Base, Electrical Equipment MT-6374/ARC-201(V).
Interface between the RT and bus controller is via the address connector and the two data connectors, bus A and