Qualifier X-Ray
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Install the VMD Power Harness
Connect the RED lead to the vehicle (+12V) ignition or accessory fuse block cir-
cuit. Connect the BLACK lead to the vehicle ground. A 2-ampere safety fuse is
used in the red lead.
Connect the power harness to the VMD.
The red Standby indicator is on with power applied and the VMD Power Switch
set to OFF.
Check / Select the VMD Transmit Frequency
Push the VMD power switch to the ON position; wait a few seconds for the VMD
to initialize, and the green Power indicator to illuminate. Then, press and hold the
Test button for 2 seconds. The orange Receive indicator flashes showing the
operating frequency by the following patterns:
One flash and a pause
frequency 1 = 27.45 MHz
Two flashes and a pause
frequency 2 = 27.47 MHz (factory default)
Three flashes and a pause
frequency 3 = 27.49 MHz
To select a different transmit frequency while a code is flashing; press the Test
button to step to the next frequency. The frequency select sequence wraps
around from frequency 3 back to frequency 1.
The VMD returns to normal operating mode after the indicator flashes the code
sequence for 10 seconds. The selected operating frequency is retained regardless
of powering conditions.
In accordance with FCC License requirements, the operating frequency may need
to be changed. Refer to the
Qualifier Transmitter Licensing
section on our web-
site at ‘www.comsonics.com/downloads.html’ for application instructions and tem-
plates.
Test the VMD Installation
Push the VMD power switch to the ON position and wait a few seconds for the
VMD to initialize. Momentarily press the Test button and the yellow Transmit indi-
cator comes on for a few seconds as the VMD generates the output power signal
to the antenna.
Warning:
The Dual Band Antenna must be properly mounted on the vehicle and
connected to the VMD before performing this test or operating the Qualifier sys-
tem. Improper operation of the system may result in permanent damage to the
VMD and is not covered under warranty.
