Section III. OPERATING PROCEDURE.

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.

3.2 Turn-on Procedure

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.

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