This procedure is used to update FH data during net operations. It can also be used
to add new FH data. During an update, the net communicates on the FH channel
it has been using.
FH Update Procedure. The following steps are designed for net members.
Do not change the CHAN setting until all updating is complete.
a. NCS will contact you. Acknowledge call. NCS will tell you in which channel
to store ERF, and to confirm reception and storage of ERF after it is finished.
Set FCTN to LD. Leave all other controls as they have been for past communi-
c. Stand by for update. NCS will transmit ERF.
d. Store ERF where directed by NCS (display will show either "HL875" or
If display is as shown ("HL", followed by numbers), press STO and acknowl-
edge that ERF was received and stored as during cold start.
If display is as shown ("HF", followed by numbers), press STO; then enter
the channel number that NCS directed you to use (step a). Acknowledge that
ERF was received and stored as during cold start.
Acknowledge when ERF is received and stored.
Set FCTN to normal operating position.
On command, set CHAN to where ERF was stored.
If FH update is being done in CT, you must scroll to nets operational COMSEC
key, or have a COMSEC key loaded into the channel selected for update.
If communication is not established, set CHAN to where you last had commu-
nication. The NCS will contact you.