Grass Valley Profile XP Service Manual - Manual (Page 48)

Chapter 4 Troubleshooting audio problems
48 Profile XP Service Manual 23 July 2004
Correcting common audio problems
This troubleshooting aid provides corrective action for some common audio
problems. Search the table for the problem you are experiencing, then try the
corrective action. Some problems have more than one corrective action.
Problem Possible Causes Corrective Action
AES/EBU or analog audio:
No audio I/O or the audio does
not match the video. You are using audio I/O
connectors for audio channels not
assigned to the video channel you
are using. Verify the audio channel pair(s)
assigned to the channel you’re
using. Refer to “Selecting audio
channels for an audio track” in
the Profile XP System Guide.
AES/EBU or analog audio:
No audio I/O. The incorrect audio input format
is selected for the audio channels
you are using. Determine the audio channels
assigned the channel by referring
to “Selecting audio channels for
an audio track” in the Profile XP
System Guide, then verify that the
correct audio input format is
selected. Refer to “Changing the
audio I/O format” in the
Profile XP System Guide.
Analog audio:
Audio is present on audio level
meters in applications, but there
is no audio output signal. Analog audio out is muted. Un-mute the audio output. Refer
to “Muting analog audio outputs”
in the Profile XP System Guide.
Analog audio:
Both E to E and playback audio
output are distorted. Audio input signal clipping
caused by excessive audio input
level or wrong input impedance
setting. PAC 216 input
impedance is set to Hi-Z by
default. Check for input audio clipping,
and reduce the input audio level
using the input gain adjustment.
Refer to “Adjusting analog audio
input level” in the Profile XP
System Guide. Change input
impedance to 600 ohms if
required in your system.
Analog audio:
Audio level is too low. Analog input and output level can
be adjusted in the Profile XP
system user interface. Adjust the input or output audio
level as required. Refer to
“Adjusting analog audio input
level” in the Profile XP System
Guide or “Adjusting analog audio
output level” in the Profile XP
System Guide
Embedded audio:
No audio input. Wrong video source selected. Select the correct video input.
Refer to “Select audio input
format” in the Profile XP System
Guide.
Embedded audio:
No audio input. Wrong audio group or channel
pair selected. Determine which audio group is
being used in the video input
signal by using “Viewing video
input status” in the Profile XP
System Guide, then refer to
“Select audio input format” in the
Profile XP System Guide.