TM 55-6930-214-10
(g) The instructor who pressed the flashing XMIT switchlight sees the light
become steady, and mic audio is gated to the proper simulated radio receiver.
(h) Subsequent press-to-talk actuations by the trainee while transmitting on
that particular radio set do not cause flashing of the XMIT switchlight of that set
at either IOS COMM panel.
(i) After one instructor has elected to answer the call, the other IOS XMIT
switchlight neither flashes nor lights. Audio over the particular radio set is not
enabled for the inactive instructor.
(j) The second instructor can get in the loop by selecting the same radio
set XMIT switchlight on the COMM panel.
(k) If both instructors are in the loop, one can disengage from the loop
without deselecting the whole loop.
(1) At the disengaged IOS, the light is extinguished, and audio for that
radio set is disabled.
(m) Radio communication is terminated by the last instructor in the loop by:
1 Pressing the radio set XMIT switchlight.
2 Selecting another interlocked switchlight.
(2) In independent mode:
(a) The pilot instructor can communicate with the pilot trainee over the
pilot ARC-186 (VHF) or ARC-164 (UHF) if the sets are operational, and over the CPG
ARC-186 (VHF) regardless of its operational status.
(b) The CPG instructor can communicate with the CPG trainee over the CPG
ARC-186 (VHF) if the set is operational, and over the pilot ARC-186 (VHF) and
ARC-164 (UHF) regardless of their operational status.
(c) The instructor initiates a call to a trainee by depressing the XMIT
switchlight associated with the desired communications set. Actuating the transmit
switch completes the transmission loop.
(d) The switchlight is lit, and the instructor mic audio is gated to the
proper simulated radio receiver:
1 If the selected radio set is operational where it is required to be
operational.
2 If the selected radio set is to be used regardless of operational status.
(e) A trainee initiates a call on the desired set by configuring the cockpit
set and COMM box properly and keying the press-to-talk switch.
(f) When the operational requirements for the set are met, the associated
switchlight on the respective IOS COMM panel flashes. Trainee-to-instructor call
audio is always enabled.
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