PeakTech 4105 Bedienungsanleitung Seite 93

5.2.6 Set amplitude
You can set amplitude by 'amplitude' or 'level'. If amplitude set is selected, high level and
low level of signal will change at the same time when changing amplitude but DC offset
remain unchangeable. If level set is selected, no matter high level or low level changing,
low or high level remain unchangeable but DC offset will change. The relationships
between Vpp, High, Low and offset are shown below:
Vpp=High-Low High=Offset+Vpp/2 Low=Offset-Vpp/2
In continuous menu, press softkey 〖 Ampl/High lev〗to set amplitude or high level. Press
softkey 〖Offset/Low lev〗 to set low level.
Amplitude Limitation: Press 〖Limit/More〗softkey, then select 'Limit High' or 'Limit Low'
to specify the limit value of high level or low level. Even if wrong operation that exceed the
limit value, the generator won't be damage and perform within the limit value.
But if specify the high level value to be +10Vdc and low level to be -10Vdc, the limit function
won't work anymore. Besides, the amplitude setting will be limit by DC offset, the amplitude
value (V ) should be confined as below,
pp
≤2×(Limi High－Offset) ≤2×(Offset－Limit Low)
V V
pp pp
Not only this, the maximum amplitude will also be limited by frequency (see chapter 5). If
V exceed the limitation of above formula or frequency, waveform generator will modify the
pp
setting value to make it confined within the allowable maximum amplitude.
Influenced by channel bandwidth, the output amplitude will decrease if frequency is higher.
So flatness compensation will be needed. To improve the sweep speed, it's not available
for frequency sweep, and the amplitude will decrease if span higher frequency.
don't reach to full range, the display value is not
For the arbitrary waveform generator, if V
pp
agreed with the output value.
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