Grass Valley PVS Series System Guide v.4.0 Dec 10 200 - Manual (Page 232)

Chapter 10 Solving Common Setup Problems
232 Profile XP System Guide July 27, 2001
Problems with audio
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 Cause(s) Corrective Action
Clicking, popping, or
interruptions in the audio signal. Wrong clock reference selected
when asynchronous video input
is recorded. Select the correct video input as
the audio sample clock
reference for the channel
pair.“Selecting the audio clock
reference” on page 160.
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” on
page 154.
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” on
page 154, then verify that the
correct audio input format is
selected. Refer to “Changing the
audio I/O format” on page 155.
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” on page 166.
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. PAC216 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” on page 164.
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” on page 164 or
“Adjusting analog audio output
level” on page 165
Embedded audio:
No audio input. Wrong video source selected. Select the correct video input.
Refer to “Select audio input
format” on page 155.
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” on page 127, then
refer to “Select audio input
format” on page 155.