Boonton 9240 Series RF Voltmeter
Table 3-1 Operating Controls, Indicators and Connections
(continued)
Reference #
Front Rear Nomenclature
Function
12 <REF Level> Key
Often relative measurements are required especially when measuring system gains
and losses. One key press of the Ref/Level key makes this easier and faster to
perform. Simply connect the active channel’s probe to the input signal of the system
under test. Press the Ref/Level key and the reference level is set! Next connect the
probe to the system output and read the gain or loss directly from the reference level
measurement.
The REF Level menu can be displayed by first pressing the
