Setting Generator Offset; Selecting A Waveform (Shape) - Ramsey Electronics SG560 User Manual

Setting Generator Offset:

To enter a DC offset, press the
of resolution. The offset is a DC component added to the AC signal. With the offset at zero
volts the AC component is centered around zero and the average voltage is zero volts. When
a DC offset is entered it is added to the waveform, moving the center up (or down) to the
level desired. Remember that
offset is desired, simply switch the cables on the output jacks, positive to negative and nega-
tive to positive.
For example, TTL (Transistor Transistor Logic) circuits require a 0V to 5V square wave. With a
0V offset the SG560 will generate a –2.5V to +2.5V square wave (average is 0 volts). To get
the square wave to 0 to 5V we must add 2.5V to the AC waveform. In this case, enter an off-
set of 2.5V. To enter this value, press
Property of Ramsey Electronics, Inc.
+1.0V
Do not reproduce or distribute.
+0.0V
-1.0V
To further illustrate the uses of DC offset, look at the waveforms above. Fig. A shows a 2V
peak to peak sinewave with 0V of offset. Fig. B shows the same sinewave with 0.3V of offset
applied. 0.3VDC is added to all portions of the wave, both the peaks and the average.

Selecting a Waveform (Shape):

You have a choice of three waveforms on the SG560: Sine, Square, and Triangle. To access
and select any one of these waveforms, use the
sor will highlight in front of the waveform symbol on the first line of the display. Then press
the 7 (Sine), 8 (Square), or
the display will use a graphic representation of the waveform to indicate which is currently
selected.
OFFSET key, then any voltage in the range of 0-5V with 10mV
SHIFT, OFFSET
OFFSET, 2, ., 5,
Fig. A
9 (Triangle) key to select the desired waveform. The upper line of
will enter the offset step size. If a negative DC
V.
Fig. B
SHAPE key. Simply press
9
BASIC USE
SHAPE and the cur-