Color classification: A: Clock board standard version (excluding OCXO) B: Clock board standard version (including OCXO) Raspberry Pi 4th generation clock board introduction: 1. The Raspberry Pi motherboard uses a low-precision passive crystal oscillator as the clock signal source, and the quality of the clock signal Low, the constant temperature crystal oscillator clock signal has high precision and high stability, and the upgraded clock can effectively change The quality of the bus clock is good. After the upgrade, the sound is extended at both ends, transparent and clean, and the details are clear. 2. Using 10MHz constant temperature crystal oscillator as the reference clock signal, all output frequency points are output synchronously with the same source. 3. One crystal oscillator signal source for one board, 3 outputs, can upgrade 3 on the 4th generation motherboard of Raspberry Pi at the same time Crystal oscillator to reduce crosstalk between different frequency points using multiple different crystal oscillators. 4. Use the low-noise voltage stabilizer chip TPS7A4700 to provide stabilized power supply for the 0CX0 constant temperature crystal oscillator. 5. The core clock processing chip is powered by a secondary voltage regulator. 6. Use G-level radio frequency dedicated 50 ohm cable to effectively ensure the quality of signal transmission. Use the ipex 1 generation seat to facilitate the disassembly and assembly of players. 7. This product is specially designed for Raspberry Pi 4th generation motherboard, only for Raspberry Pi 4th generation motherboard. For other versions of King or output other frequencies, please contact the seller before placing an order. Raspberry Pi 4th generation clock board electrical parameters: enter: External 10MHz reference clock signal or install 5V/10MHz constant temperature crystal oscillator in 25X25X13 package Input instructions: 1. The external 10MHz reference clock signal can only be used when the 0CX0 constant temperature crystal oscillator is not installed. 2. The input level cannot exceed 5Vpp. output: 1.54MHz/3.3Vpp 1ch 2. 25MHz/3.3Vpp 2 channels powered by: Power supply voltage: DC stabilized +6V to +9V (do not recommend more than 9V power supply) Recommended supply current: ≥1000MA (including MV85 constant temperature crystal oscillator reference current) (This power supply interface only supplies power to the clock board, not to the Raspberry Pi)

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