3.Functions and Operations
Math
The multimeter provides these math functions: Max/Min, dB/dBm and relative.
Only one
operation can be enabled in the Max/Min, dB/dBm, or relative operation.
Max/Min
The Max/Min operation is used to calculate the max, min and average of the readings
during the measurement period
Press the front panel
key, press the Max/Min softkey, press the Static softkey to
select ON.
Remarks
Press the Clear Readings softkey to clear reading memory and restart statistics.
dB/dBm
The dB and dBm scaling functions only apply to ACV and DCV measurements. The
functions allow you to scale measurements relative to a reference value.
Press the front panel
key, press the dB/dBm softkey to access the menu.
Press the Model softkey to enable or disable the function.
Press the Function softkey to select the operation function as dB or dBm.
dBm Function
dBm function represents the absolute value of the power. The function calculates the
power of the reference resistance according to the measured voltage, relative to 1 mW:
dBm = 10 x log
10
( reading
2
/ reference resistance / 1 mW )
Press the Ref R softkey to select the reference resistance. The value may be 50 (default),
75, 93, 110, 124, 125, 135, 150, 250, 300, 500, 600, 800
, 900, 1000, 1200, or 8000 Ω.
dB Function
dB represents the relative value which is used in the relative operation of dBm value.
When enabled, the multimeter calculates the dBm value of the reading and subtracts the
preset dB from this value and then displays the result:
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