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SerVision Embedded Video Gateway System Guide

Configuring System Settings 26

2. In the General System Settings screen, under Audio In, select a volume setting for the microphone. (For

HVG, MVG, and UVG models, which have two microphone connectors, “CH1” sets the volume of the

microphone connected to Ain1, and “CH2” sets the volume for Ain2).

Figure 20: Microphone volume settings (HVG, MVG, UVG)

Figure 21: Microphone volume settings (CVG, CVG-M)

3. Click Update Now (see figure 19 on page 25). The volume settings are updated on the Video Gateway

immediately.

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

Saving Configuration Changes, page 125). 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.

Configuring GPS

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 MultiClient, the location data that is

received is automatically sent to the MultiClient. You can then use the MultiClient to view the last detected location

of the unit on a map.

If you choose to record GPS data, you can use the MultiClient 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 new data. The unit can store over one million GPS data points – approximately 2

months’ worth of location data when the data is retrieved every 5 seconds.

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.)

GPS data can be sent in one of two 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:

 SV-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

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.

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SerVision CVG-M Technical Information Seite 27