JVC VN-E4U Instruction Manual - Page 53
Others, 7. Troubleshooting
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Others 7. Troubleshooting Symptom The [STS] lamp does not light up but blinks when power is turned on. Causes and Countermeasures 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. CH1 CH2 CH3 CH4 Error Description Light OFF Light OFF Light OFF Light A device with the same IP address as VN-E4 is ON detected. Light OFF Light OFF Light ON Light There is no video signal input to VN-E4. OFF IP address of VN-E4 is unknown See A3. IP Address SettingB. The web page of VN-E4 cannot Refer to ASTART-UP GUIDEB to check the Internet Explorer settings. be displayed 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 A warning message may appear when an anti-virus software is installed on the PC. To message appears upon starting prevent the warning message from appearing, install the built-in viewer on a PC that does up the built-in viewer 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. 53
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