SerVision
Embedded Video Gateway System Guide
Configuring System Settings
88
Note:
All of the settings on the page are saved when you click
Update Now
. The volume settings are
implemented immediately, and the changes to the other settings are implemented after the unit is restarted (see
, page 156). If you modify the volume settings and click the
Update
button in
the lower-right corner of the screen, the volume settings are not implemented until the unit is restarted.
4. In the client application, listen to the audio from the video stream that is linked to the microphone.
5. Repeat steps 2–4 as necessary until the optimal volume setting is selected.
6. Click
Update
, and then save the settings.
GPS
GPS makes it possible to track the location of an MVG or CVG-M unit by means of the unit’s built-in GPS
receiver. When GPS is enabled on an MVG or CVG-M unit, the unit uses the built-in GPS receiver to check its
location at specified intervals. Whenever you are connected to the unit through the SVMultiClient or the
SVControlCenter client application, the location data that is received is automatically sent to the client. You can
then use the client to view the last detected location of the unit on a map. (For additional information about viewing
the unit's location on a map, and tracking the route taken by the unit, please refer to the
SVMultiClient User Guide
and the
SVControlCenter Guide
.)
If you choose to record GPS data, you can use SVMultiClient or SVControlCenter to see the path that was taken by
the unit before it reached its last detected location. Recorded data is stored on the unit until the allocated disk space
is filled; then, the oldest data is overwritten by the newest data. The unit can store a great deal of GPS data. For
example, the MVG400 can store over one million GPS data points – approximately 2 months’ worth of location
data when the data is retrieved every 5 seconds.
Configuring GPS
If you have a server that can receive GPS data, MVG and CVG-M units can be configured to send the data to that
server at specified intervals. Alternatively, you can send the data to a device connected to the serial port (the
RS232/485
connector) of the Video Gateway unit (for additional information about this option, please consult your
vendor), or configure SVControlCenter to download it to its database for later use (see the
SVControlCenter User
Guide
).
GPS data can be sent in one or more of the following syntaxes. These syntaxes are part of the NMEA (National
Marine Electronics Association) standard that defines the data required to process a GPS location. The available
syntaxes are:
RMC:
A modified version of Recommended Minimum sentence version C that includes some additional
information that is not included in the standard NMEA definition, such as the name of the sending unit. Please
consult your vendor for a complete description of this sentence.
GGA sentences:
Standard GGA sentences
GLL:
Sentences that are compatible with the syntax used by the Galooli fleet-management system (for
additional information about this system, see
http://www.galooli.com/solutions/galooli-fleet/
Once the GPS data is received by your NMEA server or a device connected to the serial port, you can use it as you
wish – to display in a map, monitor vehicle locations and possible deviations from the intended route – or store the
data for future use.
NOTE:
SerVision does not provide any software for handling NMEA data that is transmitted to an NMEA
server. You must acquire and set up any required software on your own.