User's Manual

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6.7
6.4.4 TUNING FORK TEST FAILURE
If the proper speed readings are not obtained during the
previous tests, check the following:
1. The FalconHR cannot test tuning forks if the system is
not in Test mode as indicated by the flashing TEST
indicator.
2. Verify that the tuning forks are the proper tuning forks
supplied with the unit.
3. Striking the tuning fork too hard or on a metallic
surface will cause spurious overtones from the tuning
fork. This may cause the speed readings to be double
the specified speed. Also, moving the tuning fork while
in front of the antenna may cause the speed reading to
be slightly lower or higher than specified. These
readings are only momentary and the proper readings
should appear as the false overtones dissipate.
NOTE: Do not move the tuning forks after they have been
placed in front of the antenna.
4. Ensure that the FalconHR is in the transmit mode and
the range control is set to maximum.
5. If the proper readings cannot be obtained, remove the
unit from service and send to an authorized service
center for repair.
6.5 SPEEDOMETER VERIFICATION
Before the FalconHR can be used with the speedometer
pulse input, the radar unit must be synchronized with the
speedometer.