PeakTech 4055 Handbuch Seite 25

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 【Sine】【Square】【Ramp】keys directly to
select these three kinds of common waveforms, the corresponding waveform character light will be on.
Select other 13 kinds of waveforms with 【Arb】key, the light of "Arb"character will be on, 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
00
01
02
03 pos-square
04
05
06
07
4.2.10. Setting of duty cycle
When the present selection of waveform is square or ramp(including pos-square and pos-ramp), users may
press【Duty】key to display present duty cycle value, input duty cycle value with numeric keys or adjusting
knob, then the output will be square or ramp with a fixed duty cycle value. The definition of square duty cycle
is the ratio of high level time of one square to the period of this square. The usual thought of square duty
cycle is 50％, waveforms with other duty cycle are usually named pulse. The definition of ramp duty cycle is
the ratio of rising time of one ramp to the period of this ramp. The ramp duty cycle is usually named ramp
symmetry, ramps with symmetry of 0% or 100% are usually named sawtooth wave, and ramp with symmetry
of 50% is named triangle wave.
When the frequency of square is comparatively high, the setting of duty cycle is limited by the edge time, in a
relationship as below formula:
4.3. output phase setting
Under single frequency function, press 【Menu】to light "Phase" and display output phase value, input
phase value with numeric keys or adjusting knob, there are only two values, 0° and 180°, of output phase.
When setting the phase as 0° , the phase of signal from 《OUTPUT》port and is the same with the one of
signal from《SYNC》port，while when setting the phase as 180° , the two are opposite.
waveform name
sine Sine
square Square
Ramp Ramp
Pos.-square
pos-ramp Pos.-ramp
Dipulse Dipulse
Noise Noise
Stair Stair
Duty cycle× Period≥2× Edge time
Duty cycle × Period ≤ Period－（2× Edge time）
sequence
waveform
number
08 positive DC
09 negative DC
10
11 limit sine
12 exponent function
13 logarithm function
14 Half round function
15 sine function
or
-24-
Pos-DC
Neg-DC
Full sine Full sine
Limit sine
Exponent
Logarithm
Half round
name
Sin(x)/x