HP 33120A, User Manual

Page: 50 / 118

Output Amplitude
As shown below, the output amplitude range depends on the function
currently selected and the output termination.
The default amplitude is
100 mVpp (into 50 ohms) for all functions.
•
For arbitrary waveforms , the maximum amplitude will be limited if
the data points do not span the full range of the output
DAC
(Digital-
to-Analog Converter). For example, the built-in “
SINC
” waveform does
not use the full range of values between
±
1 and therefore its
maximum amplitude is 6.084 Vpp (into 50 ohms).
•
Possible Conflict with Function Change : The output amplitude is
automatically adjusted if you select a function whose maximum
amplitude is
less than that of the currently active function. This
conflict may arise when the output units are Vrms or dBm due to the
differences in crest factor for the output functions. For example, if you
output a 5 Vrms square wave (into 50 ohms) and then change the
function to sine wave, the function generator will adjust the output
amplitude to 3.535 Vrms (the upper limit for sine waves in Vrms).
From the front panel, “
AMPL LIMIT
” is displayed and the amplitude is
adjusted. From the remote interface, a -221, “Settings conflict” error is
generated and the amplitude is adjusted.
Function
Sine
Square
Triangle
Ramp
Noise
Built-In Arbs 1
Sine
Square
Triangle
Ramp
Noise
Built-In Arbs 1
Output
Termination
50
Ω
50
Ω
50
Ω
50
Ω
50
Ω
50
Ω
Open Circuit
Open Circuit
Open Circuit
Open Circuit
Open Circuit
Open Circuit
Minimum
Amplitude
50 mVpp
50 mVpp
50 mVpp
50 mVpp
50 mVpp
50 mVpp
100 mVpp
100 mVpp
100 mVpp
100 mVpp
100 mVpp
100 mVpp
Maximum
Amplitude
10 Vpp
10 Vpp
10 Vpp
10 Vpp
10 Vpp
10 Vpp
20 Vpp
20 Vpp
20 Vpp
20 Vpp
20 Vpp
20 Vpp
1 There are five built-in arbitrary waveforms stored in non-volatile memory:
sinc, negative ramp, exponential rise, exponential fall, and cardiac.
3
Chapter 3 Features and Functions
Output Configuration
59