MDE-LEDI-NETWORK-TDS-4099V3.0
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6.2.2. GPS antenna (converter unit)
Part number: 3G and 3G1 (10m cable included)
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The antenna must be placed outside and at the top of the building so as to get the widest
possible reception angle.
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Any building or mound that is more than 5 degrees above the horizon line may
obscure one or more satellites, thus reducing the antenna performance.
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Although only minimally disrupted by other systems, the antenna should not
be installed directly under a radar.
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Install the antenna vertically. No specific orientation is required.
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The green light should flash every second to indicate that at least one satellite is being
detected. The green light will light up for 0 to 200ms depending on the number of
satellites detected.
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The red light starts flashing every second once the GPS system receives the time
indication. The length of time the red light lights up for depends on the bits transmitted
in DCF77 format (100ms for “0” and 200ms for “1”, no flashing at second 59).
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In certain cases (before 2018), the flashing of the green and red LEDs could overlap
generating an “orange” light.
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The GPS code is taken into account if the number of satellites is more than 2.
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If after receiving the number of satellites remains less than 3, the DFC code is stopped
after 20 seconds.
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The receiver should be set to the correct time within 12 and 15 minutes.
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If the time is not set after half an hour, disconnect and reconnect the antenna.
