Manual

3
.
Functions and Operations
25
Data Hold
Data hold keeps the current reading on the display.
(1) Press the Run/Stop panel key to stop the trigger, and the current reading is kept on
the display screen.
(2) Press the Run/Stop key again to continue triggering.
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 Display softkey
to select On.
Remarks
 Press the Clear 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 Mode 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 Rel 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.