PeakTech 4105 Bedienungsanleitung Seite 96

5.2.9 Set polarity
Press 〖Polarity Nor/Inv〗softkey to toggle between the Normal and Inverted selections. To
most of waveforms, Normal means output waveform start from zero phase and voltage goes
rising. Inverted means output waveform start from zero phase and voltage goes dropping.
For arbitrary waveform, Normal means output waveforms are same as selected waveform;
Inverted means output waveforms are opposite to selected waveform. Take a posi tive pulse
for example, if select the inverted, the negative pulse will be output.
Polarity setting has no any influence to DC offset volts and Sync signal.
5.2.10 Amplitude range
The generator has a 0 to 50 dB attenuator with 10 dB step. Press 〖Range Aut/Hold〗softkey, the
amplitude range will change between "Auto" and "Hold". According to the amplitude value setting, the
generator will automatically select the most suitable amplitude range and attenuator state to get most
accurate output amplitude and highest signal-noise ratio. But when amplitude changes, the output
waveform may be damaged and generate glitch instantaneously at some specifically voltage value
due to the attenuator switch.
Press 〖Range Aut/Hold〗softkey to select Hold, the generator could keep the attenuation setting
value fixed at current status so it won't change along with the amplitude setting, this can prevent
output waveform from being damaged and generating glitch. But when the amplitude setting value
exceeds current range, the amplitude accuracy and signal distortion may be worse.
The amplitude range will also influence DC offset.
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