5V 200Hz~100MHz Frequency Tester With 0.91-inch OLED Display High-Precision Frequency Measurement Counter Meter Type-C

Features: 1. Dedicated SJ8K24P-T chip delivers measurement accuracy up to 10Hz/1Hz with stable and reliable performance 2. Equipped with ±2.5ppm temperature-compensated crystal oscillator (TCXO) for high frequency stability, ideal for precision frequency measurement 3. 0.91-inch blue OLED display provides clear visibility for -time frequency readings 4. Switchable MHz/KHz/Hz unit display enables quick frequency identification and user-friendly operation 5. Compact acrylic housing ensures portability and high signal sensitivity, suitable for on-site high-frequency testing Parameter: Product Name: Frequency Test Pen Power Supply: DC 4.5-5.5V (5V recommended) Operating Current: Approx. 30mA (at DC 5V) Frequency Stability: ±2.5ppm Gate Time: 0.1/1.0 Second Measurement Accuracy: 10/1Hz Measurement Range: 200Hz~100MHz Interface: Type C connector Display: 0.91-inch OLED screen Auto Memory: Settings automatically saved upon power-off and recalled at startup. Product Function: High-precision pen-style RF frequency counter with -time frequency display Application Scenarios: MCU oscillator calibration verification, wireless communication device testing, frequency generator calibration, etc. Description: The PLJ-091OLED-L1 is a cost-effective OLED display pen-type frequency counter featuring a compact, portable design. This product is designed for measuring signals requiring high frequency accuracy, such as evaluating the precision of microcontroller system crystal oscillators or assessing the reliability of communication port output timing. Display Digit Specifications: 0.91-inch OLED display supports up to 8 digits. For signals exceeding 100MHz in MHz or KHz display mode, the most significant digit (1) is not shown. To display the full value, press the K2 key to switch the unit to Hz. Notes: 1. For signal ground connections, use only the shielding layer of the shielded cable; do not use the inner conductor. 2. Do not use chargers with fast-charging capabilities, as they may output voltages exceeding 5V. FAQ: 1. Why does the frequency value display fluctuate? Answer: First, ensure the input signal quality (strength, stability, etc.) meets the minimum requirements of the frequency tester. Additionally, verify the power supply quality—ripples should not be excessive. Alternatively, adjust the sensitivity by fine-tuning the resistor. 2. Why does the reading fluctuate irregularly when no measurement signal is connected? Answer: This product features high sensitivity and readily detects environmental interference. First, check if the power supply providing electricity to the frequency tester has excessive ripple. Second, inspect for strong signal radiation sources near the frequency tester, such as computers, fluorescent lights, or switching power supplies. In the absence of strong signal interference sources, the display should read zero. Package include: Frequency counter x1 Power connection The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.