B&K Precision 4084-4087 - Manual - Manual (Page 22)

4080 series Function & Arbitrary/Function Generators –Instruction Manual
22
In case of standard waveforms “sine”, “square”, “triangle”, “rising ramp” and “pulse”, numbers can
be entered and displayed as Peak-to-peak value (Vpp or mVpp) , root mean square value (Vrms and
mVrms) or dBm value.
All other waveforms can only be edited or displayed using Vpp or mVpp units only.
4.5.3 Set DC Offset Voltage
Press【shift】 【offset】to display the current DC offset value. If the current DC offset value is not
equal to zero, the annunciator “Offset” will turn on. The DC offset value can be entered directly or
using the knob.
Example: Set an offset value -1.6V peak-to-peak
Press【shift】 【offset】【-】【1】【●】【6】【Vpp】
or
【shift】【offset】【1】【●】【6】【-】【Vpp】
or
use the knob for value entry
Zero Point Adjustment:
For zero point adjustment of the output signal, using the knob is more convenient than direct entry
via the numerical keypad. The transition of the DC offset Voltage from plus to minus sign will be
automatic when passing through the zero point. The input range of the signal amplitude and DC
offset should satisfy the following equation: |Voffset| + Vpp/2 ≤ Vmax, with the parameters
defined as followed:
Vpp is the peak-to-peak value of the amplitude
|Voffset| is the absolute value of the DC offset
Vmax is 10V at high impedance and 5V at 50Ω load.
The following table shows the corresponding relationship between the Vp-p value of the amplitude
and the absolute DC offset value at high impedance:
Vp-p value of AC signal Absolute value of DC offset
1.001 V ~ 20.00 V 0 ~ (10.000-Vpp/2) V
316.1 mV ~ 1.000 V 0 ~ 2.000 V
100.1 mV ~ 316.0 mV 0 ~ 632.9 mV
31.01 mV ~ 100.0 mV 0 ~ 200.9 mV
2.000 mV ~ 31.00 mV 0 ~ 62.99 mV
4.5.4 Adjustment of duty cycle
If the current waveform is pulse, and the current display value is amplitude, use the 【Ampl/Duty】
button to toggle between Amplitude and Duty cycle display. When the pulse width is displayed,
enter a value via the numeric keypad or the knob. The valid range is 0.1% ~ 99.9% for frequencies
below 10kHz with a maximum resolution of 0.1%. For frequencies between 10kHz~100kHz the
range is 1% ~ 99% and the maximum resolution is 1%.
Example: Enter a duty cycle value of 60.5%
Press 【Pulse】 【6】【0】【●】【5】【N】
or
use the knob and arrow keys