The **MHO+68TGD-R** is a high-performance **Oven Controlled Crystal Oscillator (OCXO)** manufactured by MtronPTI. These components are critical in telecommunications and instrumentation where extreme frequency stability is required. --- ## 1. Core Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Component Type** | OCXO (Oven Controlled Crystal Oscillator) | | **Output Frequency** | Custom (typically in the 10MHz to 100MHz range) | | **Supply Voltage** | Usually 3.3V or 5.0V DC | | **Package Style** | Through-hole (typically a "Euro" or "CO-8" package) | | **Output Type** | CMOS or HCMOS | | **Temperature Stability** | Often as low as ±10 ppb (parts per billion) | --- ## 2. Key Internal Electronic Parts The MHO+68TGD-R consists of several integrated subsystems to ensure precision: ### A. The Quartz Crystal The heart of the unit is a high-quality quartz crystal, usually **SC-cut (Stress Compensated)**. SC-cut crystals are preferred in high-end OCXOs because they are less sensitive to mechanical stress and thermal gradients compared to standard AT-cut crystals. ### B. The Heating Element (The "Oven") This part uses a power transistor or a specialized heating resistor. Its job is to maintain the crystal and sensitive circuitry at a specific, constant temperature (the "turnover point"), which is higher than the maximum ambient operating temperature. ### C. Temperature Control Circuitry This is a closed-loop system consisting of: * **Thermistor:** A temperature sensor that monitors the internal environment. * **Control IC:** A precision operational amplifier or PID controller that adjusts the power to the heating element based on feedback from the thermistor. ### D. Voltage Regulator To prevent fluctuations in the power supply from affecting the frequency, the internal electronics often include a Low Dropout (LDO) regulator to provide a "clean" voltage to the oscillator. --- ## 3. Applications Because of its high stability and low phase noise, this part is used in: * **Base Stations:** Synchronizing cellular networks (5G/LTE). * **Satellite Communications:** Ground station timing. * **Test & Measurement:** Reference clocks for frequency counters and synthesizers. ---