User Manual

4.2.7. Offset-setting:
In some cases, certain DC component should be contained in the AC signal to be output so as to produce
DC offset.
Press【Offset】key, the light of which will be on and the present offset value will be displayed. Input offset
value with the numeric keys or adjusting knob for the output signal to generate this DC offset to the output.
The relationship between the maximum DC offset and amplitude value should be below formula, if the
setting of offset exceeds, the generator will modify it until it is within the limit of the maximum offset value.
【offset】≤10-Vpp÷2
It must be paid attention that the summation of the half of the output amplitude of signal and the absolute
offset value should be less than 10V to guarantee the peak value of signal less than ±10V. Otherwise, the
amplitude-limited distortion will be induced. Besides, when the attenuation of channel A is selected auto, the
output offset will attenuate with the attenuation of amplitude. For the Vpp of amplitude greater than 2V, the
real output offset is the set offset value. For the Vpp of amplitude greater than 0.2V but less than 2V,the real
output offset is tenth of the set offset value. For the Vpp of amplitude less than 0.2V, the real output offset is
one percent of the set offset value.
It will be more convenient using the numeric keys than the knob when adjusting DC offset for output signal.
In general case, whether DC offset is positive or negative, DC level will rise if turning right and fall if turning
left. Sign of positive and negative will change automatically when passing through zero point.
4.2.8. Output of DC voltage:
If amplitude attenuation is set to be 0 dB, the output offset value is equal to the preset offset value and it is
independent of the amplitude. If the amplitude is set to be 0V, the offset can be set arbitrarily within the
range of ±10V. The generator will be a DC voltage source and preset DC voltage signal can be output.
4.2.9. Selection of waveform of channel A:
* The generator could output 16 kinds of waveforms, press 【Shift】【Sine】, 【Shift】【Square】,
【Shift】【Ramp】keys directly to select these three kinds of common waveforms, the corresponding
waveform character light will be on. Select other 16 kinds of waveforms with 【Shift】【Arb】key and the
instrument shows the present waveform sequence number, users may select output waveforms by
inputting waveform sequence number with the numeric keys or adjusting knob. The output waveform
sequence numbers are as listed as below:
List of names and sequence numbers of 16 waveforms:
sequence
number
waveform
sequence
number
waveform
00
sine
08
limit sine
01
square
09
exponent
02
ramp
10
logarithm
03
pos-pulse
11
tangent
04
neg-pulse
12
sin (x)/x
05
stair
13
half round
06
noise
14
cardiac
07
half sine
15
quake
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