The **HPS50** typically refers to the **Handheld Pocket Oscilloscope** (often the Velleman HPS50 Personal Scope). It is a portable, battery-operated digital storage oscilloscope (DSO). Below is a breakdown of its key electronic components and technical specifications. --- ### 1. Core Technical Specifications The HPS50 is designed for field service and hobbyist electronics. Here are its primary electronic ratings: | Feature | Specification | | :--- | :--- | | **Sampling Rate** | 40 MS/s (Mega-samples per second) | | **Bandwidth** | 12 MHz | | **Input Impedance** | 1 MΩ / 20 pF | | **Vertical Resolution** | 8-bit | | **Sensitivity Range** | 5mV to 20V/div (in 12 steps) | | **Coupling** | DC, AC, and GND | --- ### 2. Primary Electronic Sub-Systems #### A. Analog Front-End (AFE) This section handles the incoming signal. It consists of: * **Attenuators:** Resistor networks that scale high-voltage signals down to a level the internal circuitry can handle. * **Operational Amplifiers (Op-Amps):** High-speed amplifiers used to buffer the signal and provide the necessary gain for the 5mV/div sensitivity. * **Coupling Circuitry:** Capacitors and switches that allow the user to filter out DC components (AC mode) or see the raw signal (DC mode). #### B. Analog-to-Digital Converter (ADC) The heart of the digital system. It converts the analog voltage into binary data at a rate of 40 million times per second. * **Resolution:** 8-bit resolution means the vertical scale is divided into 256 discrete levels ($2^8$). #### C. Control Unit (Microcontroller/FPGA) The HPS50 uses a central processor to: * Manage the user interface (buttons and menu). * Process the data coming from the ADC. * Store waveforms in internal memory for playback or "hold" functions. * Calculate measurements like Vpp, Vrms, and Frequency. #### D. Display Module * **Type:** High-contrast LCD (Liquid Crystal Display). * **Backlight:** Integrated white LED backlight for visibility in low-light environments. * **Resolution:** Usually 192 x 112 pixels, optimized for waveform rendering. #### E. Power Management * **Battery Power:** Designed to run on 5x 1.5V AA batteries or a DC power adapter. * **Regulators:** Internal Low-Dropout (LDO) regulators convert battery voltage into stable 3.3V or 5V rails for the digital and analog components. --- ### 3. Connection and I/O * **Input BNC:** A standard BNC connector for oscilloscope probes. * **USB Port:** Some versions include a USB interface for data logging or screen captures to a PC. * **Triggering Logic:** Electronic circuits that detect when a signal crosses a specific voltage threshold to stabilize the display. ---