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Check probe attenuation (Section 3.4). If you are using a 10x probe, the channel input must also be set to 10x. Press CH1 > Probe > select 10X. The manual includes a calibration table: at 10x, input capacitance is 15pF typical.

While the manual covers basics, experienced users have discovered nuances:

| Control | Function | |---------|----------| | | Enable channel, set coupling (AC/DC/GND), probe attenuation (1×/10×) | | MATH | Add, subtract, multiply, or FFT | | MEASURE | Automatic measurements (Vpp, frequency, period, etc.) | | AUTO SET | One-button automatic waveform adjustment | | RUN/STOP | Freeze waveform | | TRIGGER | Set trigger level, edge/slope, source | | HORIZONTAL (Time/Div) | Timebase adjustment | | VERTICAL (Volts/Div) | Amplitude scaling |

If you lost the CD, contact Hanmatek support directly via their official Amazon seller account—they will email you the PDF within 24 hours.

This explains the base time (s/div) and the memory depth implications. The manual clarifies that at slower time bases, the sample rate decreases automatically.