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7. Troubleshooting
Symptom Causes and Countermeasures
The [STS] lamp does not light
up but blinks when power is
turned on.
The STS lamp will light up if VN-E4 is started up successfully. The light will appear blinking
when troubles occur during startup and the error details will be displayed in CH1-CH4.
IP address of VN-E4 is unknown See A3. IP Address SettingB.
The web page of VN-E4 cannot
be displayed
Refer to ASTART-UP GUIDEB to check the Internet Explorer settings.
The built-in viewer cannot be
installed
Refer to ASTART-UP GUIDEB to check the Internet Explorer settings.
Installation of the built-in viewer may fail when an anti-virus software is installed on the PC.
Install the built-in viewer on a PC that does not have such anti-virus software installed.
An anti-virus software warning
message appears upon starting
up the built-in viewer
A warning message may appear when an anti-virus software is installed on the PC. To
prevent the warning message from appearing, install the built-in viewer on a PC that does
not have such anti-virus software installed.
Authentication by Verisign
appears upon installing the
built-in viewer.
Verisign’s electronic signature is stored in the built-in viewer. For PCs that are connected to
WEB, the authenticity of the viewer can be verified by Verisign authentication server.
TCP image/audio cannot be
played back
Check the total bit rate and number of distributions on the AOperationB page of VN-E4.
Maximum bitrate from VN-E4 is 40 Mbps. New requests for distribution will be denied upon
exceeding 40 Mbps.
VN-E4 allows TCP transmission of up to 10 streams of JPEG or audio data. For example,
when acquiring 4 JPEG and 1 audio streams via TCP using the built-in viewer, a maximum
of 2 built-in viewers may be connected to one VN-E4. Make use of multicast for monitoring
by multiple viewers. VN-E4 allows multicast transmission of up to 10 streams.
Multicast image/audio cannot
be played back
Start multicast transmission manually from the AStreamingB page of VN-E4.
In the case of multicast reception at the built-in viewer, check that the multicast address
and port number of the built-in viewer settings coincide with those on the AStreamingB page
of VN-E4.
Make use of a network that supports IGMP for multicast transmission.
The frame rate of JPEG is low Check the settings on the AEncodingB page of the VN-E4 unit. Check the built-in viewer
settings as well when a built-in viewer is in use.
Frame rate will be constrained when the network bandwidth is narrow.
Frame rate will be constrained when there is prolonged network delay or when the data
volume sent from VN-E4 is high. When this occurs, enlarge the window scale of the PC on
which the viewer is running. The window scale can be altered by changing the Windows
registry. Refer to Windows manual on procedures to change the Windows registry.
Noise is heard in the audio Narrow network bandwidth or considerable jitter may cause failure of smooth transmission.
This can be remedied by reducing the transmission volume. Transmission volume can be
lowered by reducing the number of channels, frame rate and frame size of JPEG data to
acquire.
Audio output from the PC will pass through Windows’ sample rate conversion function. For
some PCs, sample rate conversion may not be performed properly and interruptions may
occur in the audio sound. To resolve this problem, perform the following procedures to
change the Windows settings.
Go to AControl PanelB - ASounds and Audio DevicesB - AAudioB Tab - AAdvancedB -
APerformanceB Tab, and change ASample rate conversion qualityB from ABestB to AGoodB.
For some PCs, sound quality may deteriorate when the Windows OS plays back audio files
such as beep sounds with ASample rate conversion qualityB set to AGoodB.
Sound Blaster is recommended for use with this product.
A white zone appears in the
built-in viewer.
For some PCs, a part of the Internet Explorer graphics may not appear and is left white
when the following IE setting is performed.
ARight-click on DesktopB - APropertiesB - ASettingsB - AAdvancedB - AGeneralB - ADPI settingB,
and selecting ALarge sizeB or ACustom sizeB
When this occurs, graphics will be properly restored by selecting ANomal sizeB instead of
ALarge sizeB and ACustom sizeB.
CH1 CH2 CH3 CH4 Error Description
Light
OFF
Light
OFF
Light
OFF
Light
ON
A device with the same IP address as VN-E4 is
detected.
Light
OFF
Light
OFF
Light
ON
Light
OFF
There is no video signal input to VN-E4.