This chapter addresses three items of equipment associated with
The PLGR, in addition to its primary function of determining position
location, serves as the principal source of correct Julian Date and exact
GPS Zulu time for SINCGARS net sync time. Julian Date and GPS Zulu
time can be downloaded from the PLGR by direct connection to the RT,
or by manually loading PLGR time into an ANCD, with subsequent
loading of the RT from the ANCD. Additionally, the ANCD can be used
as the source of required PLGR keys.
FHMUX is a development item which when fielded will allow operation
of up to four SINCGARS vehicular radios from a single antenna.
Specific guidance regarding the FHMUX will be added to this manual
when the system has been approved for fielding and firm procedures
have been developed.
By connecting the STU to an ANCD, it IS possible to transfer COMSEC
keys, FH data, and SOI information over commercial or military
telephone circuits for unlimited distances. This capability enhances
SINCGARS operations for widely dispersed units, and it could be
especially useful during mobilization of Reserve Component forces.