OPERATING PROCEDURE.
3.1
General Information
This section should be read carefully before using the
instrument. It contains information necessary for
proper operation of the RF Voltmeter.
The power line frequency and voltage requirements of
the instrument are 105 to 125 Volts, 58 to 62 cycles.
It is important that it is plugged into its proper
power source.
a. With the power cord plugged into an appropriate
AC source, turn the instrument on and allow a
warm-up period of approximately one minute.
b.
Connect the RF Probe cable to the "PROBE" re-
(Note: Check to
ceptacle on the front panel.
determine that the serial number of the probe
matches that of the instrument. Each RF Volt-
meter is calibrated for its individual probe.
If probes should be interchanged without recali-
brating the instrument, errors in measurement may
result.)
c. Attach
Adapter to RF Probe in order to shield
the input from any stray RF fields (3.4c) before
preceding to adjust BALANCE control (3.2d).
AN/URM-145
a
