Bird Technologies 4304A - Manual (Page 5)

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Caution Statements
The following equipment cautions appear in the text whenever the equipment is
in danger of damage, and are repeated here for emphasis.
CAUTION
Do not drop. Calibration could be disturbed or the meter could be damaged
as a result.
CAUTION
Above 800 MHz, do not exceed 150 W RF power.
CAUTION
RF power must not exceed range switch setting.
CAUTION
Do not attempt to remove the RF center conductor. This will damage the line
section.
CAUTION
When handling the circuit board, use caution:
Do not bend the dc contact finger that extends into the line section.
Do not lose the contact finger insulator or the
spacers on the mounting screws.
Do not disturb the potentiometer settings.