Choice oled Frequency Meter 2CH Digital Frequency Meter 1KHZ~200M/20M-2400M Low/High Frequency Counter RF S

2CH Low/High Frequency RF Frequency Counter – OLED Display, 1KHz–200MHz / 20MHz–2.4GHz, High Precision Frequency Measurement Module, Type-C 5V Powered

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Product 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.

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Key Features:

• Dual-Channel Input:

  • Low-Frequency: 1KHz – 200MHz via XH2.54-2P connector

  • High-Frequency: 20MHz – 2.4GHz via SMA connector

• High-Precision Measurement: Resolution up to 1Hz

• 4 Operation Modes: Switchable between HF/LF with selectable gate time

• Invalid Frequency Filter: Default enabled; can be disabled via startup setting

• Compact Design:oled 8-digit LED display, easy to integrate

• Power Supply: Type-C DC 5V (standard USB-A to Type-C cable required; fast chargers and fast charge cables are NOT supported)

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Technical Specifications:

Operation Modes (Key Switchable):

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Filter 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 mode

Usage Instructions:

1. Low-Frequency Input: Connect signal via XH2.54-2P connector. Range: 1KHz–200MHz, amplitude 0.1Vpp–3Vpp.

2. High-Frequency Input: Connect signal via SMA connector. Range: 20MHz–2.4GHz, power level –15dBm to +10dBm.

3. Mode Switching: Press the button to cycle through 4 modes. Mode number and gate time are displayed on screen.

4. 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.

5. 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.

6. High-Frequency Sensitivity: Sensitivity varies across the band – lower at the extremes, highest in the mid-range.

7. 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 testing

• Ham radio frequency monitoring

• Electronics laboratory measurements

• Signal generator calibration

• Educational training

• Industrial frequency monitoring

• DIY electronics projects