Press or click/tap on the screen, then the math operation interface is
displayed, as shown in
Figure 5.40
.
Figure 5.40 Math Operation Setting
Table 5.15 Description of Math Operations
Parameter Remarks
Statistics
Makes statistics of the current measurement, including maximum
value, minimum value, average value, standard deviation, and
count (current count of the samples).
Limit
Sets the upper and lower limits and makes limit operation to
identify those signals that are beyond the limits by sounding an
alarm. It is applicable to DCV, ACV, DCI, ACI, Resistance,
Frequency, Capacitance, and temperature measurements.
dBm
The dBm function is logarithmic, comparing power delivered to a
reference resistance,
relative to 1 milliwatt:
dB
Each dB measurement is the difference between the input signal
and a stored reference value, with both values converted to dBm.
Relative Enables or disables the Relative operation.
Front Panel Operation
DM858 Series User Guide
72
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