Lesson 3/Learning Event 3
(4) Measurement switch. The MEASUREMENT switch is used to select the
This section does have one special feature, a switch labeled NORMAL
TEST and 60 Hz RECEIVE FILTER.
It is spring loaded and remains in the
"normal test" position, but when it is depressed to the "60 Hz receive
filter" position, it filters out any 60 Hz power hum that may be on the
circuit or line under test. This reduces level measurement error caused by
AC power related noise.
(5) Line monitor. The line monitor section permits you to listen to
the circuit under test, transmit or receive. The circuit may be monitored
using the built in speaker or by using a handset plugged into the output
(a) The output jack also may be used to connect an analyzer or