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Sound Processor
PXE-0850X 20201201v1
z 27/28
Troubleshooting Guide
Symptom Possible Cause Remedy
1
Controller only displays
Alpine logo and doesn’t allow
controls.
The USB cable is not plugged in the
right direction, a laptop is plugged
in, or the phone app is connected.
The USB cable needs to be plugged into
the PXE-0850X with the side that has the
connection for the controller going away
from the PXE-0850X.
A PC can’t be plugged into the PXE-0850X
and have use of the controller at the same
time. Disconnect the device.
The phone app can’t be connected via
Bleutooth to the PXE-0850X and have use of
the controller at the same time. Disconnect
the app.
2
Not getting full range sound.
OEM head unit has crossed over
outputs.
Outputs should be tested with an
oscilloscope and RTA to see what
frequencies they are outputting.
If the outputs are crossed over they will need
to be mixed with others to get a full range
signal. Test the output of the PXE-0850X
to see what channels need to be mixed in
more.
3
Top light on PXE-0850X is
flashing.
Device is connected and the app is
being used.
When the app is connected the lights on the
unit will flash. Once the app is disconnected
they will go back to steady.
4
Light stays on after vehicle is
shut off.
The PXE-0850X stays on for 2
minutes after the system shuts off.
This is normal operation.
5 Bluetooth module is flashing. No devices are paired to the unit.
If a device is paired to the PXE-0850X the
Bluetooth extension light will stop flashing
and the light will go steady.
Specifications
Type of Input Signals 6-channel high-level, 6-channel Aux, S/PDIF, Coaxial, Bluetooth
Output Type 12-Channel RCA output, 8-Channel high-level
Output Signal Gain Range of gain: mute, -59.9dB - 0dB
Native Sample Rate 32k - 96k
Output Signal EQ
1. Range of frequency: 20Hz - 20KHz, resolution 1Hz
2. Q-Factor: 0.404 - 28.85, resolution 0.01
3. Gain: -12.0dB - +12.0dB, resolution 0.1dB
Output Crossover
1. Types of filters: Butterworth, Linkwitz-Riley, and Bessel
2. Filter crossover points: 20Hz - 20KHz, resolution 1Hz
3. Filter slope (Slope) setting: 12dB/Oct - 48db/Oct
Output Phase Position And Delay
Phase: 0°/180°
Delay: 0.000-20 milliseconds, 0.00-692cm, 0.00-273inches
Number Of Preset Sound Settings 6
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