User's Manual

Configuring and Testing in the

Vehicle

When the MDC has been installed in the vehicle, there are some configuration and testing

procedures that Mentor Engineering recommends following. These procedures can verify

that the unit is ready for fleet operation when it leaves the installation site.

Setting the MDC Modem Level

Note: Setting the modem level is not required on any data network (EDACS, CDPD,

Mobitex, etc.).

If the MDC is being used in a radio system, then the MDC Modem Level should be set

while installing. The MDC can be set to transmit modem tones at a certain audio level but

the radio limits excessive levels causing signal distortion. Therefore, if the transmit level is

too high the data will over-deviate the channel and will not be successfully decoded by the

receiving device. If the transmit level is too low, then the transmission will be under-

deviated and not be received either.

Follow this procedure to correctly set the MDC Modem Level. A radio service monitor

will be required.

Press *CONFIDENTIAL* to get back into the MDC maintenance menus.

Press the function key next to the RAD CONFIG text to go into the radio

configuration menus.

Press MORE and you will see the label MDM VOL next to the top

function key.

Set up your service monitor to monitor the frequency that the mobile radio

will be transmitting on.

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