PS Engineering
PMA450 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0000
Page 3-3
Rev. 6, Dec. 2015
3.5 COM Audio Selector (3)
Communication audio from the other radio, not selected for transmit, can be heard by pressing the associat-
ed RCV button. You will always hear the audio from the selected transceiver.
3.5.1
Swap Mode (Switch from Com 1 to Com 2 remotely)
With an optional yoke mounted, normally open momentary switch, the pilot can change from the current
Com transceiver to the other by pressing this switch. To cancel "Swap Mode," either press the yoke mount-
ed switch again, or select a different Com with the XMT buttons.
3.5.2
IntelliAudio® Dimensional Audio
Various audio signals are presented to the DSP and processed to “appear” in a different location to the
crew. “Multi-Talker” (US Patent #7,391,877) specifies up to nine locations. This helps the crew to better
comprehend speech by locating it in a manner easier differentiated by the human brain.
Intercom and other audio is not spatially processed, only the pilot and copilot VHF COM audio.
You must use stereo headsets, in stereo mode for this feature.
The spatially processed dimensional sound in the PMA450 can be adjusted to accommodate the user pref-
erences.
This adjustment allows the Spatial Audio inputs to be “relocated” on any of nine (9) defined “Head Related
Transfer Function” (HTRF) locations.
Push
IntelliAudio → IntelliAudio Config
to access. In the IntelliAudio® mode, repeated pressing of the
COM 1 or COM 2 line select buttons moves the corresponding half-circle cursor to the locations relative to
the listener graphic in sequence.
Pressing the
Done
button exits the configuration setting mode. This setting is recalled at system power up.
Figure 3-3 IntelliAudio – True Dimensional Sound, Spatial Location Display, showing C1 at 30°left
and C2 at 90° right of center.
3.5.3
Com Monitor Mode
The PMA450 is equipped with a Monitor function, which allows a secondary com radio audio to be muted
by the primary radio (selected for transmit).
To toggle the Monitor mode on and off, Press
IntelliAudio → MONITOR
NOTE: Monitor Mode and Spatial Audio Processing (IntelliAudio) are mutually exclusive – entering one
mode will cancel the other.
3.5.4
Navaid Selection (4)
VHF Navigation receivers can be selected directly from the front panel with the N1 and N2 (VHF Naviga-
tion receiver 1 and 2) buttons. The selected source is indicated by a green LED.