VOLTCRAFT FG 8210 Bedienungsanleitung Seite 30

The following figure shows the basic curves of the generator with the phase relationships.
TTL-Pulse
Triangle
Sine
Rectangle
8.1.2 SETTING DC-OFFSET
• The adjustment button "DC OFFSET" (11) permits changing the direct voltage share of the output signal in the
area from approx. +/- 5 V at 50 Ohm (or +/- 10 V at the unloaded output). To set the offset, pull the adjustment
button (11) to activate the function. A turn to the right (+) means a positive offset of the signal curve, a turn to the
left (-) means a negative offset. If the adjustment button is pushed, the output signal has no direct voltage share.
The adjustment of the "DC OFFSET" up (positive) or down (negative) within the voltage limits (+/- 5 V at
50 Ohm or ± 10 V at the unloaded output) ensures that there is no danger of the amplitudes being cut off,
which would lead to signal distortion. However, if a high amplitude and a great offset setting meet, the output
signal may be distorted (cut). This can be verified easily with an oscilloscope. To avoid this problem, reduce the
amplitude or the DC offset if possible.
The following table offers information on how and within which limits the offset level is moving and when the signal
is cut (at 50 Ohm).
Maximum amplitude setting
No DC-offset
No distortion
Reduced amplitude setting
Low DC-offset
No distortion
Maximum amplitude setting
Large DC-offset
Strong distortion
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