Fluke 5700A Series II User Manual

Front Panel Operation
Setting the Output 4
4-33
In the Wideband AC function, dBm means decibels above or below 1 mW, calculated
for a 50Ω load. The formula to calculate dBm is 10 log (power in mW). For example,
if 3.0V is supplied to a 50Ω load, the dBm level is:
10 log (180.0 mW) = 22.5527 dBm
If you switch to standard ac output, but keep dBm as the displayed units, the dBm
value will change. The value changes because dBm is calculated for a 600Ω load in
the standard ac output function. Using the same voltage level as in the previous
example, if you switch to standard ac output, the dBm level changes to:
10 log (15.0 mW) = 11.7609 dBm.
6. If you want to enter a negative dBm value, press +.
7. Press U or m if necessary.
8. Press V for volts or D for volts expressed as dBm.
9. The Control Display now shows the amplitude of your entry. If you made an entry
error, press C to clear the display, then reenter the value. The following illustration
of the Control Display assumes an entry of 20 dBm:
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10. Press up to five numeric keys to select a frequency, followed by K or M if
necessary. The Control Display now shows the amplitude and frequency of your
entry. If you made an entry error, press C to clear the display, then reenter the
value. The following illustration of the Control Display assumes an entry of 21 MHz:
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Fluke 5700A Series II Specifications

General

Type	Multifunction Calibrator
Operating Temperature	0 °C to 50 °C
Storage Temperature	-20 °C to 70 °C
Voltage Range	0 to 1100 V
DC Voltage Range	10 μV to 1100 V
Frequency Range	1 MHz
Humidity	non-condensing
Power Requirements	100 V to 240 V