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According to the figure above, the conversion relation between Vpp and Vrms
fulfills the following equation:
For example, if the current amplitude is 5 Vpp, input a decimal point in the
numeric keypad, and then select a unit Vrms. Tap "Ok". Then, it can be
converted to a value with Vrms as the unit. For sine waveform, the converted
value is 1.768 Vrms.
2． How to set the amplitude of the waveform in dBm?
Method:
1)
Press Output1 or Output2 (also, you can tap the channel output
configuration status bar or
channel.
2)
Tap the channel output configuration status bar
menu label and select "Off". Then use the numeric keypad to set a proper
load value.
3)
Select the desired waveform, tap the Ampl menu label, and then input
the desired value by using the numeric keypad. Then select the unit
"dBm" from the pop-up menu.
Remarks:
dBm is the unit for signal power absolute value， and the conversion relation
between dBm and Vrms fulfills the following equation:
Wherein, R represents the channel output impedance value and it must be a
specific value, so the unit dBm is not available when the output impedance is
"HighZ".
For example, if the current output impedance is 50 Ω and the amplitude is
1.768 Vrms (i.g. 5 Vpp), input a decimal point in the numeric keypad and then
select "dBm". Tap "Ok" to convert the amplitude value to the corresponding
value in dBm. The converted value is 17.9601 dBm.
2-6
Vpp =
(CH2). In the channel setting interface, tap the OutputSet
Vrms
=
dBm
10lg(
Chapter 2 Front Panel Operations
2
2
Vrms
2
1
)
R
0.001
W
) to select the desired
(CH1) or
DG2000 User Guide
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