Equipment Setup/Operation. Assemble and install the radio set and KY-90 individually per applicable
technical manuals. Perform Preventive Maintenance Checks and Services (PMCS) and/or Built-In-Test
(BIT) functions. Load all frequencies, hopsets, and variables into the radio set and establish voice
communications before connecting the KY-90 to the radio set. Once voice communication has been
established, connect the KY-90 as described in the following paragraph.
Cabling Instructions. The following figure illustrates the typical configuration for the connection between
the radio set and the KY-90.
Refer to Figure 1; then perform the following cabling procedure:
Connect interface cable connector P3 to RT AUD/DATA connector.
Connect interface cable connector P2 to RT RXMT connector.
Connect interface cable connector P1 to KY-90 RADIO J2 connector.
Figure shows KY-90 connected to lower radio (RT-A).
KY-90 may be connected to upper radio (RT-B) if desired.
Figure 1. Cabling for KY-90 to SINCGARS Radio Set