AKTAKOM ADS-4062 is a high performance handheld oscilloscope with great range of dynamic input scope. It has small volume which convenient to carry, compact interface and etc. It satisfies the most needs of outside measurement and improves working efficiency greatly.
Dual-input, combine oscilloscope, Multimeter and recorder (including TrendPlot and waveform Recorder) in one unit
Input voltage: input voltage through BNC is up to CATII 300V and CATⅢ 150V
Standard probe: 10X CATII 400V
Optional probe: 10X CATII 1000V and 10X CATIII 600V
Oscilloscope and multimeter safety grade is up to CATII 600V and CATIII 300V
5.7 inch TFT color LCD display
60MHz Bandwidth, 1GSa/s real-time sampling rate single channel, up to 50GSa/s equivalent sampling rate, 2Mpts memory depth
With 6000 dots display resolution Multimeter and provides measurements of DCV, ACV, DCI, ACI, Resistance, Diode, Capacitance and Continuity
Support Scope TrendPlot, Meter TrendPlot and Scope Recorder
Trigger modes: Automatic, Normal and Single
Trigger types: Edge, Pulse, Video, Slope and Alternative
32 automatic measurements, 3 cursor measure modes
4 digital filter mode: Low pass, High pass, Band pass, Band limit
Math functions: +, - , ×, ÷, FFT operations
Multiple Language User Interface
Standard configuration interface: USB Device, USB Host
Support USB storage and update; support PC remote control and PictBridge print
Rechargeable Li battery pack, compact, portable, fit for outdoor operation
There is wave form displayed, but it is not stable
Check whether the Source item in the TRIG MODE menu is in conformity with the signal channel used in the practical application.
Check on the trigger Type item: The common signal chooses the Edge trigger mode for Type and the video signal the Video. Only if a proper trigger mode is applied, the wave form can be displayed steadily.
Try to change the trigger coupling into the high frequency suppress and the low frequency suppress to smooth the high frequency or low frequency noise triggered by the interference.
When changing the horizontal sweep on the digital oscilloscope at different horizontal points observed inexplicable change in the form of the same signal, why is this happening?
In fact, this is not a problem.
Just keep in mind that you're using a digital oscilloscope, which digitizes the signal with different sampling rates depending on the selected horizontal sweep, and then connects the digitized points with strait line while restoring the real shape of the signal.
Your first screen shows that you are measuring voltage 50 Hz with the 10 ms / div sweep and a sampling frequency of 20 kHz Ks/s
One signal period (20 ms), digitized in this mode, 20E-03 (sec) * 20E03 (1/sec) = 400 points. This is enough to properly restore and interpolate a sine wave of 50 Hz (i.e. in a period of 20 ms).
Normal display, with a sweep 10 ms / div:
Distortion of the same signal at 10 s / div sweep
Your second screen is set to sweep 10 sec / div, and sample rate on a sweep turned to 20 samples per second (20 Sa / s). I.e. one signal period 20 ms had: 20E-03 (sec) * 20 (1/sec) = 0.4 points. That means that to restore (to interpolate the points) a sine wave with less than one point in time is impossible, so you get this mess (known as "aliasing" or a false frequency) formed by the beats of the measured frequency and sampling frequency.
In order to correctly install a data collection in a digital oscilloscope one should follow a simple rule - the sampling rate must be at least 5-10 times higher than the frequency signal, in that case you will not have the issues that we just discussed.
This applies to all digital oscilloscopes and in no way connected to any particular make or model of oscilloscope or its probes.