Avionics Innovations DMP-300 (MP3 Player) Installation Manual - Manual (Page 8)

DMP-300 INSTALLATION GUIDE PAGE 8 OF 20
P/N DMP010 V3.2
This is especially useful in single-pilot helicopter applications. If the remote pushbutton is
mounted on or near the cyclic, the pilot can control the audio without releasing the flight
controls. After playback of each audio track, the DMP-300 display automatically “points” to
the next track on the memory card. Thus, the pilot can simply press the remote button
after each track to initiate playback of the next audio track.
The Remote Pause/Play input can be configured in Setup Mode as active high or active
low. It can also be configured as either an “edge-activated” or a “level-activated” signal:
• Edge-Activated
When set to “edge-activated” (the default setting), the remote pushbutton works
exactly like the front panel knob. Pause/Play function is toggled each time the
signal changes from inactive to active, and new track playback may be started
from the remote pushbutton as well. For example, if set up as Active Low, the
Pause/Play will toggle each time a grounding pushbutton is pressed. Releasing
the button has no effect.
•
Level-Activated
This setting is intended for use when the remote Pause/Play input is connected to
a cabin PA system’s KEY signal, to momentarily pause the DMP-300 playback
while the PA is in use. If a track is playing, the DMP-300 will be PAUSED for as
long as the Pause/Play signal is active, and will resume playing when the signal
returns to inactive. If the DMP-300 is either idle or paused when the remote
Pause/Play signal changes, it has no effect.
Like the discrete trigger inputs, Remote Pause/Play does not require a pull up or pull down
resistor. The input signal may vary between 0V and 35 VDC: levels above 3.5 VDC will be
interpreted as “high”, while levels below 3.5 VDC will be “low”.
When Edge-Activated is selected, the Remote Pause/Play input works in parallel with the
front panel knob – playback may be paused via one and resumed via the other. Unlike
the front panel knob, however, playback mode cannot be cancelled by holding the Remote
Pause/Play input active.
3.3.3 Discrete Triggers
Seven discrete trigger inputs are provided, each of which can be assigned to a particular audio
track via the CardPrep software. When a trigger input becomes active, the corresponding
audio track is played. Each input can be configured independently in Setup Mode as active
high or active low. Triggers 6 and 7 can have a special function – see “Jog Mode” below.
The external triggers do not require a pull up or down resistor.
If more than one trigger input becomes active at the exact same time, the higher number input
has priority. For example, if Trigger 5 and Trigger 3 become active simultaneously, the track
assigned to Trigger 5 is played and Trigger 3 is ignored.