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Operation (continued)
NOTE:
Cookie used by the built-in viewer
The built-in viewer stores set values in file called cookie. Directory containing cookie can be known using the following method.
Go to the following in the Tools menu of Internet Explorer.
AToo ls B - AInternet OptionsB - ATemporary Internet filesB on ASettingsB Button - AView FilesB Button
A list of files will be displayed. Click ANameB to sort the files. The file with the name of Ae4-cgiB is the cookie of the built-in viewer.
Upon deleting this file, the built-in viewer will be restored to its factory settings.
A ACH1 RequestB
Checkbox
The viewer will acquire image of the corresponding CH from VN-E4 according to boxes that are checked.
When the checkbox for a channel is deselected, the viewer will not acquire image of this channel
from VN-E4 and the CH button will be disabled. Additionally, no image will be displayed even if
the checkbox is selected if the corresponding CH and JPEG size on the AEncodingB of the VN-E4
unit are set to off.
B JPEG Size Selection
Button
Select either VGA (640 x 480) or QVGA (320 x 240) as the video frame size.
No image will be displayed even when the size is selected on this screen if this size is set to off
on the AEncodingB page of the VN-E4 unit.
NOTE:
Selecting a large frame size will increase the processing load of the PC on which the viewer is running.
Set to a value such that the load of the PC on which the viewer is running does not exceed 80 %.
C Display Selection
Button
Select AReverseB to rotate the image display by 180Њ.
D Title Selection Button Select AOnB to display the camera name and time in JPEG file. Camera name can be changed
on the AInputB page of the VN-E4 unit.
E Frame Rate Selection
List
For selecting the acquisition frame rate of the viewer.
The frame rate set at the VN-E4 unit will be the upper limit to which the viewer can acquire. For
example, when VN-E4 is set to A15 fpsB, transmission will only be possible at 15 fps even when
the client requests for 30 fps. Alternatively, when VN-E4 is set to A15 fpsB and 10 fps is requested
by the client, data will be sent at 7.5 fps to enable transmission at even intervals. In the case of a
1-to-1 connection between VN-E4 and the viewer, it is recommended that the frame rate of the
viewer and VN-E4 be set to the same value. To play back multiple viewers at different frame
rates, set the frame rate accordingly at the individual viewer.
NOTES:
● When the frame rate set is smaller than that at the VN-E4 unit, this will be reflected in the
frame rate during transmission from VN-E4 when acquisition is performed via HTTP.
● When acquisition is performed via multicast, data volume will not decrease even when a
frame rate that is smaller than that at the VN-E4 unit is set, and the built-in viewer will play
back images while skipping frames.
●
Selecting a large frame rate will increase the processing load of the PC on which the viewer is running.
Set to a value such that the load of the PC on which the viewer is running does not exceed 80 %.
F Alarm Event Selection
Button
When AMakeB is selected, the AAlarmB button will light up when Make occurs in the alarm input of
VN-E4. When ABreakB is selected, the AAlarmB button will light up when Break occurs in the
alarm input of VN-E4.
G Auto Alarm Clear For selecting the time interval to turn off the light automatically after AAlarmB button is illuminated.
H Stream Selection
Button
For selecting the protocol when the viewer acquires data from VN-E4.
When HTTP is selected, packet loss can be recovered by HTTP though number of clients is
limited. Maximum number of HTTP streams is 10. When AMulticastB is selected, multiple viewers
can monitor VN-E4 though packet loss causes noise or skip of data. Additionally, start multicast
sending on the AStreamingB of the VN-E4 unit when playing back via AMulticastB.
When the viewer is launched with
A
Multicast
B
specified, a Windows firewall warning may be
displayed. When this occurs, proceed upon selecting “Unblock”. If “Block” is selected, the
Windows firewall will block the multicast streams and playback of
A
Multicast
B
at the viewer will fail.
I Multicast Address,
Port
For specifying the multicast address and port number for 4 channel JPEG and audio. This is
enabled only when AMulticastB is selected in the AStreamB selection. Specify the same value as
the parameter that is set on the AStreamingB page of VN-E4.
J Audio Monitor
Selection Button
Select AOnB to enable audio monitoring of VN-E4 using the viewer. The viewer will not acquire
audio from VN-E4 when AOffB is selected.
K Buffering Time
Selection Button
For selecting the buffer volume of the viewer.
To shorten the delay time, select a small buffer. To ensure stable playback on a network with
unstable bandwidth and jitter, select a large buffer.
L Boundary For selecting boundary lines on the screen.
M Operator Password For registering the AoperatorB password of VN-E4.
Upon registering the password, features of the ASpeech OnB and AControl CH1-CH4B buttons
will be available for use.
N OK Button For saving the changed settings. To enable the new settings, exit and restart the viewer.
O Cancel Button For canceling the changed settings and closing the setting screen.