The **CRO2117A-B2** is a high-performance **Voltage Controlled Oscillator (VCO)** module typically manufactured by companies like Z-Communications. It is designed for use in telecommunications and signal processing where precise frequency generation is required. --- ### 1. Key Technical Specifications The following table highlights the primary electronic characteristics of the CRO2117A-B2: | Parameter | Specification (Typical) | | :--- | :--- | | **Frequency Range** | 2117 MHz (Fixed/Narrowband) | | **Tuning Voltage** | 0.5 to 4.5 Vdc | | **Output Power** | 0 ± 3 dBm | | **Phase Noise** | -115 dBc/Hz @ 10 kHz offset | | **Supply Voltage (Vcc)** | 5 Vdc | | **Supply Current (Icc)** | 25 mA | | **Harmonic Suppression** | -15 dBc | --- ### 2. Core Electronic Components & Architecture The CRO2117A-B2 utilizes a specific architecture to achieve low phase noise and high stability: * **Ceramic Resonator (CRO Technology):** Unlike standard LC oscillators, this part uses a high-Q ceramic resonator. This is the "CR" in the part number, which allows for significantly lower phase noise. * **Varactor Diode:** Used in the tuning network to change the capacitance based on the input tuning voltage, thereby adjusting the output frequency. * **Buffer Amplifier:** Internal circuitry includes a buffer stage to isolate the oscillator from load variations (pulling) and to provide the necessary output power level. * **Surface Mount Package:** Usually housed in a MINI-16-LOW or similar shielded package to minimize Electromagnetic Interference (EMI). ### 3. Application Use Cases This component is generally found in the following electronic systems: 1. **Satellite Communications:** Used as a Local Oscillator (LO) for frequency conversion. 2. **Point-to-Point Radio:** Providing stable carrier signals for microwave links. 3. **Test Equipment:** Signal generators requiring high spectral purity. --- ### 4. Typical Implementation (Pinout Schematic) While specific footprints can vary, the interface usually follows this logic: ```markdown Pin 1: Tuning Voltage (Vt) Pin 2: Supply Voltage (Vcc) Pin 10: RF Output Others: Ground (GND) for Shielding ```