UNI-T UPO2000CS Series, User Manual

Page: 52 / 94

UPO2000CS series User Manua
51
Under the window scale mode the screen is divided into two display areas as the above picture
shows. The upper part displays the original waveforms, which can move left and right through
rotating the knob horizontal POSITIONAL or can enlarge and reduce the selected areas through
rotating the knob horizontal SCALE. The lower part displays the horizontal scale waveform. Note
that scale time base improves definition compare with the main time base (as the above picture
shows). Because the waveforms displayed by the whole lower part are corresponding to the areas
selected by upper half part, rotating the knob horizontal SCALE to reduce the selected areas can
improve the scale time base, namely , can improve the waveforms horizontal SCALE multiple.
Note: The max scale time base is 200ns/div.
4.2 Independent Time Base
In independent time base, CH1~CH4 can be arranged in timing, so that the channel can observe signals of
different frequencies.
As shown below, CH1 is a 100kHz sine wave, CH2 is a 10 Hz square wave, CH3 10kHz triangular wave, CH4
1kHz pulse wave. By using the independent time base, frequency signals with large variation can be observed.
4-2 Various Frequencies Signal at Independent Time Base
4.3 Trigger Release
Trigger release can observe complex waveforms (such as pulse series). Release time is the time for the
oscilloscope to re-enable the trigger. In the period of release and suppression, the oscilloscope will not be