Reloading Sync Time

TM 11-5820-890-10-8

Reloading Sync Time

4.6d.

This method calls for reloading of sync time, whether as a part of an

ALSO EASY

ICOM fill, by electronic transfer from a PLGR, or through manually

loading new sync time via the RT keypad.

The typical situation in which to use this method IS again where the

SITUATION

operator is reasonably certain that sync time is the problem. Another

factor is that the operator may not be willing to wait for traffic to be heard

(passive method) and elects this method to re-enter the net as quickly

as possible.

There are three procedures by which sync time can be reloaded:

PROCEDURE

(1)

Repeat ICOM fill that includes sync time. Procedure is the same as

that described in Figure 4-7 and Primary Operator Task 2, "Load

COMSEC/FH Data/Sync Time into RT Using ICOM Fill."

(2) Connect a PLGR to the RT and transfer GPS time. (See PLGR

Task 3, "Load PLGR Date and GPS Zulu Time in SINCGARS RT,"

for detailed procedure.)

(3)

Determine correct GPS time from PLGR or ANCD, clear and load

new Julian Date, clear and load new hours and minutes. Press

[STO] at the time seconds are the same in the source device and

the RT. Newly loaded sync time should be within one second of

source time, otherwise try again. (See Figure 4-11, below, or

Subtasks c and d of Primary Operator Task 3, "Perform Hot Start

Net Opening," for detailed procedures.)

Obtain running GPS time from ANCD or PLGR.

(1)

Press [TIME] on RT; display shows "DD."

(2)

Press [CLR] on RT; display shows "- -'"

(3)

Enter correct Julian Date; display shows "XX."

(4)

Press [STO] on RT; Julian Date is stored.

(5)

Press [TIME] on RT; display shows "HH MM."

(6)

Press [CLR] on RT; display shows " _ _ _ _."

(7)

Enter GPS HH; display shows "HH."

(8)

Enter MM, the minute ahead of GPS time.

(9)

When RT and GPS minutes are the same (zero

(10)

seconds), press [STO] on RT.

If time stored in RT is more than one second

(11)

different from GPS time, reload sync time.

Manual loading of GPS sync time is complete.

(12)

Figure 4-11. CHANGING RT SYNC TIME

4-20