# Oscilloscope Vertical Volts/Div Calculation If the **vertical volts/div control** is set to **"5"** (interpreted as **5 volts/division**), you can determine the peak-to-peak and RMS values from the scope display. > **Note:** Since Figure 12–12 is not provided, I will use a generic method. > You can substitute the actual number of divisions from your display. --- ## 1. Peak-to-Peak Voltage (\(V_{p-p}\)) - **Count the number of vertical divisions** the waveform spans from its maximum positive peak to its maximum negative peak. - Let's call this number \(N\). \[ V_{p-p} = N \times (\text{Volts/Div}) \] **Example:** If the display shows the waveform spanning **3 vertical divisions**: \[ V_{p-p} = 3 \times 5\,\text{V} = 15\,\text{V} \] --- ## 2. RMS Voltage (\(V_{\text{rms}}\)) For a **sine wave**: \[ V_{\text{rms}} = \frac{V_{p-p}}{2\sqrt{2}} \] **Example (using the value above):** \[ V_{\text{rms}} = \frac{15\,\text{V}}{2\sqrt{2}} \approx \frac{15}{2.828} \approx 5.3\,\text{V} \] --- ## 3. Summary Table | Measured Divisions (\(N\)) | Volts/Div | Peak-to-Peak (\(V_{p-p}\)) | RMS (Sine Wave, \(V_{\text{rms}}\)) | |----------------------------|-----------|-----------------------------|-------------------------------------| | 3 | 5 V | 15 V | 5.3 V | --- **To get your actual values:** - Count the number of divisions (\(N\)) from your oscilloscope display. **If you provide the number of divisions, I can give exact numeric answers.**