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3.8 Necessary Preparations
3.7.1 Check up battery power before brings the apparatus on the go.
Start up KC901S to observe voltage. If voltage>8.0V, it means that
the rest power is more than a half. It is strongly advised to set
auto power off in case that the battery runs out. For long hour’s
outdoor work, either a charger or a vehicle power supply connector
should be used. In wildness, an external battery pack is needed.
3.7.2 KC901S should be carried with a waterproof suitcase to prevent
from rain and water. The specialized suitcase for KC901S is advised.
3.7.3 Proper attenuator should be prepared for measuring
transmitter and amplifier. When the measured signal exceeds the
limit, attenuator must be connected in series.
3.7.4 When testing an antenna in a place with lots of other antennas,
a terminal wattmeter is used to measure inductive power of the
antenna which should not be more than 0.1W. Many times, several sets
of antennas are concentrated on the same tower, inducing strong
transmit power through space coupling. Too strong RF power induced
from the antenna under measurement are bound to burn down the
equipment.
3.7.5 If short-wave antennas are erected near high voltage lines
and sub stations, the measured induced voltage should not be more
than 15V, AC. (check with multimeter). It is strongly suggested that
the shield of coaxial line should be grounded nearby.
3.7.6 If RF signal of circuit board is measured by a probe, outside
protective shield of measuring cable should be connected with ground
of the circuit. It is dangerous to do suspension measurement that
may burn out KC901S and board under measurement.
3.7.7 KC901S can be used during charging, but measuring active
devices should be avoided. If the measurement is inevitable, an
equipotential bonding between ground of KC901S and ground of DUT
is needed to avoid damage to DUT and the equipment.
3.7.8 The standard strap is only suitable for general use. Firm
safety rope and packing bag should be prepared for working at heights
to avoid accidental falling. Setting a warning region below the
tower when someone works on it.
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