To Set A Dc Offset Voltage - HP 33120A User Manual

Chapter 1 Quick Start

To set a dc offset voltage

To set a dc offset voltage
At power-on, the function generator outputs a sine wave with a dc offset
voltage of 0 volts (into a 50Ω termination). The following steps show you
how to change the offset to –1.5 mVdc.
Offset
1 Enable the offset modify mode.
The displayed offset voltage is either the power-on value or the previous
offset selected. When you change functions, the same offset is used if the
present value is valid for the new function.
+0.000
Enter Number
2 Enter the magnitude of the desired offset.
±
.
5 Notice that the
1
on the display, indicating that the number mode is enabled. Notice
that
-1.5
To cancel the number mode, press
Shift
3 Set the units to the desired value.
∨
kHz
At this point, the function generator outputs the waveform with the
m Vrms
displayed offset. Notice that the
that the waveform is being output with an offset. The annunciator will
turn on when the offset is any value other than 0 volts. To turn off the
flashing digit, move the cursor to the left of the display using the arrow keys.
-01.50
1
You can also use the knob and arrow keys to enter a number.
See "Front-Panel Number Entry" on page 3 for more information.
VDC
annunciator turns on and "
Num
±
toggles the displayed value between
mVDC
1
ENTER NUM
+
and – .
.
Shift Cancel
annunciator turns on, indicating
Offset
1
" flashes
21