Arbitrary Waveform Generator - Produktinfo.conrad.com

WGxx Arbitrary Waveform Generator Front Panel Operation
10
The application of the offset memory cells can be performed in the same way
as has been already described for frequency adjustment. If the mode line is
displayed one of the three operating modes ‘uni-polar positive’ ( ), ‘uni-polar
negative’ ( ) or ‘bipolar’ ( ) can be selected. For the uni-polar modes
amplitude and offset are automatically limited in that way that the output signal
of the instrument is either exclusively positive or negative, respectively. In case
of bipolar operation mode both output signal polarities are permitted (cf. Fig.6).
The actual polarity mode is indicated by parentheses ( ).
Vpp
0V
Output Attenuator
Voffs
0V
Vpp
0V
Vpp
Voffs
Voffs
Fig.6 : Offset modes; ‘ uni-polar positive’ (top left)
‘ uni-polar negative’ (top right)
‘ bipolar’ (bottom)
If the Output button is pressed the actual attenuation value is displayed
(Fig.7); in case 'Lowpass-Filter' is indicated, the Output button has to be
pressed again.
O u t p u t
( 0 d B ) - 2 0 d B O F F
Fig.7: Display of output attenuation
If −20dB is selected, all indicated voltage values (amplitude, offset) are
accordingly divided by the factor 10.
Selectable Low-Pass Filter
If the Output button is pressed a second time the status of the selectable lowpass
filter is indicated (Fig.8). If (ON) is selected, a low-pass with a cut-off
frequency of ≈10MHz (WG810: ≈500kHz) is inserted into the signal path
(possible only for arbitrary signals).
L o w p a s s - F i l t e r
( O N ) O F F
Fig.8: Low-pass filter selection