100MHz Ultra Low Phase Noise OCXO | -168dBc/Hz @ 1kHz | Xtalong

Why Ultra Low Phase Noise OCXO is Critical for Next-Gen RF Systems: A Deep Dive into the 100MHz Standard

In the world of high-frequency communications, radar, and precision measurement, signal purity is the ultimate benchmark. At the heart of these systems lies the Ultra Low Phase Noise OCXO (Oven-Controlled Crystal Oscillator).

As systems push toward higher bandwidths and more complex modulation schemes, the demand for stable, "clean" reference clocks has never been higher. Today, we examine the technical breakthroughs of the 100MHz Ultra Low Phase Noise OCXO from Chengdu Xtalong Electronics CO.,LTD, and why its -168 dBc/Hz @ 1kHz performance is a game-changer.

What Makes an OCXO "Ultra Low Phase Noise"?

An OCXO utilizes an internal oven to maintain the quartz crystal at a constant temperature, shielding it from external environmental fluctuations. While standard OCXOs provide excellent frequency stability, an Ultra Low Phase Noise OCXO is specifically engineered to minimize short-term frequency fluctuations.

The XTALOCXO-2525-100M-5V-SW by Xtalong Electronics sets a high bar for spectral purity. Phase noise is the "jitter" in the frequency domain; the lower this noise, the more precise the timing of the system.

Key Technical Specifications

Based on the official datasheet, here are the parameters that define this high-performance component:

Nominal Frequency: 100.00 MHz

Phase Noise Floor:

-108 dBc/Hz @ 10Hz

-138 dBc/Hz @ 100Hz

-168 dBc/Hz @ 1kHz (Industry-leading performance)

-185 dBc/Hz @ 100kHz

Frequency Stability: ±0.1 ppm (across -40°C to +70°C)

Output Power: +16 dBm to +20 dBm (Sine Wave)

Package Size: Compact DIP 25.4*25.4mm (1x1 inch)

100MHz Ultra Low Phase Noise OCXO Graph

Core Advantages of Xtalong’s 100MHz OCXO

1. Unmatched Spectral Purity

With a phase noise of -168 dBc/Hz at 1kHz offset, this oscillator minimizes the "noise pedestal" that can degrade the performance of Analog-to-Digital Converters (ADCs) and Digital-to-Analog Converters (DACs).

2. Exceptional Thermal Stability

Operating in harsh environments requires more than just low noise. Xtalong’s design ensures a frequency-temperature stability of ±0.1 ppm, making it reliable for outdoor base stations and aerospace applications.

3. High Output Drive

Providing an output power up to +20dBm, this OCXO can drive multiple RF components in a signal chain without the need for additional buffer amplifiers, which often introduce unwanted noise.

Critical Applications

Where does the Ultra Low Phase Noise OCXO provide the most value?

Radar & Electronic Warfare: Low phase noise is essential for improving Doppler resolution, allowing radar systems to detect small, slow-moving targets against heavy clutter.

5G/6G Telecommunications: As modulation moves to 256QAM and beyond, the Error Vector Magnitude (EVM) becomes highly sensitive to clock jitter. A clean 100MHz reference ensures low Bit Error Rates (BER).

Satellite Communications (SATCOM): Ensures stable carrier synchronization for long-distance data links.

Precision Test & Measurement: Acts as the internal reference clock for spectrum analyzers and signal generators where the equipment's own noise floor must be lower than the device under test.

About Chengdu Xtalong Electronics CO.,LTD

Chengdu Xtalong Electronics CO.,LTD is a premier manufacturer specializing in high-precision frequency control products. Our commitment to R&D has resulted in the XTALOCXO-2525 series, which combines rugged reliability with elite-level electronic performance.

Every unit undergoes rigorous testing (as seen in our Phase Noise Measured Graphs) to ensure it meets the strict requirements of modern RF infrastructure.

Explore the Product

For full technical drawings, 3D models, or to request a quote for the Ultra Low Phase Noise OCXO, visit our official product page: