NEC VisuaLink 128/384 User Manual page 140

Chapter 9
Area Condition
Picture is slow
Picture is too Blocky
Video
Local camera does not
pan/tilt
Far-end camera does not
pan/tilt
Audio can not be heard
Transmitting audio is very
low at remote end
Audio from the remote end
is low
Audio
Have increased the
volume and microphone
gain but the audio is still
low
I hear an Echo
Page 9-2
Check Item and Countermeasures
[One channel has connected]
Look at front panel and verify that both B1 and B1-B6 LEDs are lit.
Video quality is set to Resolution handling
Change the video quality to motion handling. This will increase the frame
rate and allow more of the bandwidth to be dedicated towards the video
motion
[One channel has connected]
Look at front panel and verify that both B1 and B1-B6 LEDs are lit.
Video quality is set to Resolution handling
Change the video quality to motion handling. This will increase the frame
rate and allow more of the bandwidth to be dedicated towards the video
motion
[Camera control cable is not connected]
Verify the camera control cable is connected from the SERIAL output of
the VisuaLink to the VISC IN of the camera.
Camera is not a suggested manufacture.
VisuaLink is able to control two types of cameras the VCC1 and EVI-
D30.
[Camera control cable is not connected]
Verify the camera control cable is connected from the SERIAL output of
the VisuaLink to the VISC IN of the camera.
Camera is not a suggested manufacture.
VisuaLink is able to control two types of cameras the VCC1 and EVI-
D30.
Check the audio cable and volume setting.
Speaker is to far away from the microphone?
Is the microphone cable connected?
Increase the microphone gain setting.
Increase the volume setting at the remote end.
[Volume setting is set to low]
Using the remote controller increase the volume by selecting the volume
up button
The microphone gain level at the remote end is to low
Increase the gain level for the microphone in the Audio setting section
[Check the Monitor volume knob]
The monitor volume should be about half way.
[Check the microphone to speaker distance]
The microphone should be at least 6 feet (2 meters) away from the
speaker.
Note: Echo is always caused by the Far-end.
VisuaLink 128/384 User Guide
NDA-24230 Issue 2.0