Chapter 6 Troubleshooting
ViewStation FX/VS 4000 User’s Guide 156 www.polycom.com
Video
Audio clipping at far site
when using an external
wireless microphone.
Audio input is overdriven on the
ViewStation FX or VS4000.
Turn down output of wireless
microphone. Put the ViewStation FX or
VS4000 in local loop and adjust
microphone output until you hear audio
coming back clear and crisp with no
clipping.
Local audio can be heard
when speaking in the
microphone.
The monitor or audio amplifier is
connected to the VCR audio output.
Connect the monitor or audio amplifier to
the monitor audio out of the ViewStation
FX or VS4000.
An echo is heard at the
near site when speaking.
Far site microphone pod is too close
to the audio speaker.
At the far site, make sure the
microphone pod is placed away from the
audio speaker.
The far site audio volume may be too
loud.
Turn down the audio volume at the far
site.
Near site or far site can not
hear or see the VCR audio.
VCR input is not selected. Turn on the VCR input by selecting the
NEAR key twice and selecting the VCR
icon.
Symptom Cause Solution
Picture is blank on the
main monitor.
System goes to “sleep” mode after
3 minutes of inactivity.
Pick up the remote control. System
wakes up.
Same picture is seen on
first and second
monitor.
Only one monitor is enabled. Enable ViewStation FX or VS4000
for two monitors on the Monitor
Setup screen.
Monitors are connected to the
same output. Monitor has a
composite as well as an S-Video
output.
Connect Monitor 2 to the Monitor 2
connection on the rear panel of the
ViewStation FX or VS4000.
Picture freezes
frequently during a call.
Network line transmission errors
or IP LAN traffic is too high. Check
the error count under the
Diagnostics menu or try a lower
speed IP LAN call.
Check your system by Near End
Loop test under the Diagnostics
menu. If the picture does not freeze,
tell the far site to perform the same
test. If the picture freezes there are
line errors on your ISDN lines.
You can also test this by placing a
video call to an ISDN loopback
number provided by your service
provider.
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