(b)
11S15, AIR/GND SYS 1
E. Four Channel Microphone Test
S 865-009
(1) Connect the 600 ohm headphone to the HEADSET or HEADPHONE jack on the voice recorder control panel M50 (P5).
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MAINTENANCE MANUAL
S 865-010
(2) Connect the boom microphone to the captain's jack panel (P13)
(AMM 23-51-00).
S 865-122
(3) Set the BOOM/OXY switch on the captain's audio-selector panel (P8)
to the BOOM position.
S 865-123
(4) Put a cover on the area microphone at the voice-recorder control
panel.
S 865-134
(5) Speak into the boom microphone.
(a) Make sure that you hear your voice through the headphone at the
control panel.
NOTE:____ When you test the digital or solid state voice
recorder you will hear your voice in the headset as you
speak. When you test the analog or tape based voice
recorder you will hear your voice in the headset after
approximately a 0.5 second delay.
S 865-124
(6)
Disconnect the boom microphone from the captain's jack panel (P13).
S 865-136
(7)
Connect the boom microphone into the first-officer's jack panel (P14).
S 865-125
(8)
Set the BOOM/OXY switch on the first-officer's audio-selector panel (P8) to the BOOM position.
S 865-126
(9)
Put a cover on the area microphone at the voice-recorder control panel.
S 865-137
(10)
Speak into the boom microphone.
(a) Make sure that you hear your voice through the headphone at the control panel.
NOTE: When you test the digital or solid state voice
____ recorder you will hear your voice in the headset as you speak. When you test the analog or tape based voice recorder you will hear your voice in the headset after approximately a 0.5 second delay.
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S 865-024
(11)
Disconnect the boom microphone from first-officer's jack panel.
S 865-085
(12)
Connect microphone to the observer's or supernumerary's jack panel.
S 865-006
(13)
Put a cover on the area microphone at the control panel.
S 865-139
(14)
Push the observer's PTT switch to speak into the microphone.
S 865-144
(15)
Push the supernumerary's R/T switch to speak into the microphone.
(a) Make sure that you hear your voice through the headphone at the control panel.
NOTE: When you test the digital or solid state voice
____ recorder you will hear your voice in the headset as you speak. When you test the analog or tape based voice recorder you will hear your voice in the headset after approximately a 0.5 second delay.
S 865-034
(16)
Disconnect the microphone from the captain, the first officer and the first-observer (or the supernumerary) jack panels.
S 865-082
(17)
Remove the cover from the area microphone on the voice recorder control panel.
S 865-035
(18)
Move approximately three feet away from the area microphone on the voice recorder control panel.
S 705-036
(19)
Speak in a usual voice.
(a) Make sure that you hear your voice through the headphone at the control panel.
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