FFCS: CONTROLS AND INDICATORS - Continued
The MONITOR switch, when placed in the WK position, permits the crew
member access to the functions selected on the WORK switch. In positions A, B,
C, D, E, and F the crew member can monitor one radio (MONITOR switch) while
transmitting and receiving on another radio (WORK switch). In the ALL position
the crew member can receive all radio channels as defined by the programming
of the MCS.
FULL FUNCTION CREW STATION (FFCS)
Figure 2-12. MONITOR Control Switch of FFCS
The INTERCOM switch allows two-way communication over the radios only
(subject to the access levels defined in PROG 1, PROG 2, and PROG 3),
intercom only, or radios and intercom.
When placed in the push-to-talk (PTT) position the crewmember must activate
the headset or vehicle PTT switch in order to engage in two-way intercom
communication, if the WORK switch is in the INT position, or two-way radio
communication, if the WORK switch is in the A-F position
When placed in the LIVE position, the crewmember can communicate over the
intercom hands free regardless of the position of the work switch. Two-way radio
communication is still subject to the WORK switch settings of A-F and activation
of the headset or vehicle PTT switch.
When placed in the VOX (Voice Operated Switch) position the crewmember can
communicate on the intercom hands free but without introducing vehicle noise as
long as the volume of the signal is sufficient to overcome the threshold level
setting of the VOX. Two-way radio communication is still subject to the WORK
switch settings of A-F and activation of the headset or vehicle PTT switch.