TM 11-5895-1412-12&P
j.
Enter the number of
6).
Display blinks
which the hopset is
the channel in which the hopset is to be stored (1-
and shows “STO” followed by the channel number in
stored.
o If additional hopsets are to be loaded, repeat steps a thru j for each.
k.
Set ECCM fill device function switch to OFF.
1.
Disconnect ECCM fill device from rt connector AUD/FILL.
m.
Set rt switches as needed for normal operation.
FH SYNC TIME (CHECKING AND SETTING)
The FH sync time clock in your rt is used to time FH operations. NEVER
confuse FH sync time with the time of day.
There are seven separate clocks
inside the radio.
There is a base clock and a clock for each CHAN setting
(1-6). MAN and CUE settings display the base clock time. All clocks are set
within an hour of the base clock time.
When time is first loaded into the radio (cold start ERF or manually), all
seven clocks are set to the same time.
When an ERF is received into a
specific channel, the sender’s net time is also received and stored in the
channel with the hopset (it must be within one hour of base clock time already
within the radio).
Whenever FH sync time is loaded using the keyboard, ALL of
the clocks in the radio are reset to the base clock’s time. It is not
possible to reset the net time for only one channel manually. This can only
be done using ERF.
Updating the FH sync time is done automatically each time a message is
received from the NCS.
The NCS must be an active member of a FH radio net so
that member’s radios are updated (NCS is the time standard for net). If you
are a member of more than one net, it is important that you communicate with
the NCS daily.
To find the time of a specific net (monitoring FH sync time of other nets),
set the CHAN to the position where the net’s hopset is stored; then press
The display shows that net’s time. It is possible to check the
time of a net while operating in a different net: Enter the number of the
channel (1-6) on the keyboard while the time of your operating net is on
display.
The display changes to that net’S\s time.
During net operation the time might drift. It can drift as much as half a
second if the FCTN is set to a normal operating position for up to 24 hours.
It can drift up to 4 seconds if the FCTN has been set to STBY for up to 24
hours.
If your radio drifts more than this, it should be turned in to
maintenance.
If the FCTN has been set to STBY for more than 24 hours, the
radio clocks are automatically turned off.
The amount of time that your radio
clock drifts determines what type of operation is possible.
If your clock has drifted more than 59 minutes, it is possible to zeroize FH
data (set FCTN to Z-FH), re-load data for cold start; then request a cold
start.
CHECKING FH SYNC TIME
a. Set FCTN to SQ ON.
J-10
