Chapter 5
Test and Measurement Functions
DVM (Digital Voltmeter)
22130634
CX300 ComXpert Operation Manual
Rev. 001
5.8 DVM (Digital Voltmeter)
The Digital Voltmeter (DVM) measures the electrical potential difference between two
points in a circuit, either Direct Current Voltage (VDC) or Alternating Current Voltage
(VAC). The DVM meter displays the results of this measurement. The
AF Input 1
connector
or
AF Input 2 connector
can be selected as the input connector used for
performing DVM measurements.
The DVM meter pane contains a plot field that displays measurement as voltage (vertical
scale) over time (horizontal scale). DVM controls and settings are configured from the
DVM settings menu
. The DVM supports user-configurable meter scales which are
described in
. The DVM also contains the following controls
and settings:
Signal Routing (cont)
Speaker
This control selects the source of the signal being received by
the speaker.
Oscilloscope
This control selects the source of the signal being received by
the Oscilloscope.
Noise
This control selects the source of the signal being used to
perform noise measurements.
AF Freq
Counter
This control selects the source of the signal used by the AF
Frequency Counter.
Table 5-22 Audio Signal Routing Controls and Settings
Control/Setting
Description
Table 5-23 DVM Controls and Settings
Parameter
Description
Measurement
Peak
This setting selects the type of measurement being displayed
on the meter.
Positive Peak
When
Positive Peak
is selected, the meter displays the
highest positive value measured.
Negative Peak
When
Negative Peak
is selected, the meter displays the
lowest negative value measured.