Ramsey Electronics SG560 Guía de usuario descargar pdf (Pagina 9)

BASIC USE

Setting Generator Offset:

To enter a DC offset, press the OFFSET key, then any voltage in the range of 0-5V with 10mV

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 SHIFT, OFFSET will enter the offset step size. If a negative DC

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 OFFSET, 2, ., 5, V.

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 SHAPE key. Simply press SHAPE and the cur-

sor will highlight in front of the waveform symbol on the first line of the display. Then press

the 7 (Sine), 8 (Square), or 9 (Triangle) key to select the desired waveform. The upper line of

the display will use a graphic representation of the waveform to indicate which is currently

selected.

+1.0V

-1.0V

+0.0V

Fig. A

Fig. B

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Ramsey Electronics SG560 Guía de usuario Pagina 9