Multichannel Systems STG-Lite Manual - Manual (Page 18)

STG-Lite Manual
14
Frequency
The waves can be delivered in a frequency between 0.1 and 10000 Hz. Click 1, 10, 100 or 1000 Hz
as a basic value. Fine tune the frequency between 0.1 and 10 times the basic value with the virtual
control dial. Click onto the red point of the control dial and move it while keeping the left mouse
button pressed. The exact value of the frequency will be displayed below the "Start / Stop"
button. You can change the value while program is running.
Amplitude and DC Offset
Select the amplitude of the waves. The unit is percent of the maximum output of the STG (usually
+/- 8 V). So a dial setting of 50 would result in an amplitude of 4 V. Click onto the red point of the
control dial and move it while keeping the left mouse button pressed. The exact value of the
amplitude will be displayed below the "Start / Stop" button. You can change the value during
program is running.
Use the DC offset control dial to apply a constant DC offset. The amplitude of the DC offset is
also given as a percentage of the maximum output of the STG. Please keep in mind that the pulse
amplitude will be relative to the DC offset. That means, for example, that a sine wave with an
amplitude of +1 V and a DC offset of +2 V will result in a wave fluctuating between +1 V and
+3 V. Therefore, a DC offset limits the amplitude of the pulse, as the absolute output maximum
of the STG is fixed. A DC offset of +1 V would mean that the maximum pulse amplitude can be
only 7 V, assuming the standard output maximum of +/-8 V). Click onto the red point of the
control dial and move it while keeping the left mouse button pressed. You can modify the DC
offset while program is running.