Section III. Technical Principles of Operation

TM 11-6625-3060-10

Section III. Technical Principles of Operation

PRINCIPLES OF OPERATION

NOTE

The following functions shown on the front panel are not used

or have limited use:

The dBm position of the OFF-mV-dBm switch is not used.

The FULL SCALE AUTO pushbutton switch is not used.

The FULL SCALE dBm + 20 thru - 50 scale is not used. May be used in conjunction with dBm meter for reference.

The dBm meter is used for a zero level input reference and not for power measuring purposes.

Power Switch

Placing the OFF-mV-dBm switch in the mV position applies ac power.

RF PROBE and PROBE Input Connector

When the RF PROBE is connected to an rf signal source the circuits in the RF PROBE rectify and filter the rf signal.

The rectified and filtered rf signal becomes a dc voltage that is proportional to the rf signal source.1-7