FSR PATHFINDER Covers all PFD-4X4 and PFD-4X2 - Manual (Page 10)

10 PATHFINDER
AUDIO INPUT TRIM ADJUSTMENTS
The audio trim may be adjusted for each of the 4 audio sources via the front panel. This is done by
first pressing the ESCAPE button (if a previous operation was in progress) then pressing and holding
the desired AUDIO INPUT button (the green audio input LED will flash) and then simultaneously
pressing the volume up or down buttons to adjust the trim for the selected source. The green input
select lamp will flash and the LED bar graph will remain lit for the duration of the adjustment. The
audio trim may be ramped up or down by holding both the audio source button and the respective
trim direction button and will traverse the –5 dB to +15 dB range in approximately 2-3 seconds. Or
the user can adjust in discrete 1 dB increments by discrete volume up or down presses. When the
audio input source button is released, the audio trim adjustment is terminated.
AUDIO OUTPUT LEVEL ADJUSTMENT
The current audio output level may viewed and adjusted via the VOLUME UP/DOWN and
OUTPUT SELECT pushbuttons located on the right side of the front panel. The audio range may
be adjusted in 1 dB increments from a floor of –45 dB to +5 dB by either pressing and holding the
VOLUME UP/DOWN buttons or by discrete button presses. Each discrete press adjusts audio in
1dB steps. When continuously pressing a volume up or down button, the audio output level will
be ramped in 1 dB increments, traversing the entire range from –45 to +5 dB in approximately 3
seconds. The five audio level indicator lamps are illuminated accordingly to reflect five ranges.
Current audio output levels can be viewed by pressing the desired OUTPUT SELECT pushbutton.
AUDIO MUTE
When an output is selected, AUDIO MUTE may be toggled on and off by pressing the AUDIO
MUTE push button to the immediate left of the audio output level lamps. The user may adjust the
audio output level down while remaining in mute state. However, if the user presses the volume up
button while muted then the audio will be unmuted and the audio output will be heard at the current
level.
POWER INTERRUPT OR FAILURE EVENTS
The last saved route configuration, audio settings and mute states will remain in memory in the
event of AC power failure or interruption. The unit will return to it's previous state when power is
restored.