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2CH Low/High Frequency RF Frequency Counter – OLED/LED Display, 1KHz–200MHz / 20MHz–2.4GHz, High Precision Frequency Measurement Module, Type-C 5V PoweredProduct Description:This dual-channel RF frequency counter module offers high-precision frequency measurement across a wide range. It features separate inputs for low-frequency (1KHz–200MHz) and high-frequency (20MHz–2.4GHz) signals, with OLED display for clear readout. Powered via Type-C USB (5V), it is ideal for laboratory use, RF testing, ham radio, and electronics debugging. The module includes adjustable gate time settings for optimized resolution and a configurable invalid frequency filter.Key Features:Dual-Channel Input:Low-Frequency: 1KHz – 200MHz via XH2.54-2P connectorHigh-Frequency: 20MHz – 2.4GHz via SMA connectorHigh-Precision Measurement: Resolution up to 1Hz4 Operation Modes: Switchable between HF/LF with selectable gate timeInvalid Frequency Filter: Default enabled; can be disabled via startup settingCompact Design:oled 8-digit LED display, easy to integratePower Supply: Type-C DC 5V (standard USB-A to Type-C cable required; fast chargers and fast charge cables are NOT supported)Technical Specifications:ParameterLow-Frequency InputHigh-Frequency InputFrequency Range1KHz – 200MHz20MHz – 2.4GHzInput Signal0.1Vpp – 3Vpp–15dBm to +10dBmConnectorXH2.54-2PSMA FemaleImpedance50Ω (typical)50ΩOperation Modes (Key Switchable):ModeBandGate TimeResolutionDisplay Indication1High-Frequency0.064s1KHzH-0.0642High-Frequency0.64s100HzH-0.643Low-Frequency0.1s10HzL-0.104Low-Frequency1s1HzL-1.00Filter Setting:Press and hold the button, then connect the power supply to enter the filter setting mode.ON = filter enabled, OFF = filter disabled.After setting, long press the button for 2 seconds to return to measurement modeUsage Instructions:Low-Frequency Input: Connect signal via XH2.54-2P connector. Range: 1KHz–200MHz, amplitude 0.1Vpp–3Vpp.High-Frequency Input: Connect signal via SMA connector. Range: 20MHz–2.4GHz, power level –15dBm to +10dBm.Mode Switching: Press the button to cycle through 4 modes. Mode number and gate time are displayed on screen.Invalid Frequency Filter:Default enabled (unstable signals show 0Hz). To disable: hold button while plugging in power, then release to enter filter settings; press button to toggle.Measurement Stability:Ensure proper contact and appropriate signal strength. When measuring 100MHz–900MHz, harmonics may cause false readings; add an external low-pass filter or calculate fundamental frequency from harmonic values.High-Frequency Sensitivity: Sensitivity varies across the band – lower at the extremes, highest in the mid-range.Power Supply: Use Type-C DC 5V with a standard USB-A to Type-C cable. Do NOT use fast chargers or fast charge cables.Applications:RF circuit debugging and testingHam radio frequency monitoringElectronics laboratory measurementsSignal generator calibrationEducational trainingIndustrial frequency monitoringDIY electronics projects