In GNSS positioning systems, the frequency stability of the reference clock directly impacts positioning accuracy, startup speed, and system reliability. As the core clock source of the system, the Temperature Compensated Crystal Oscillator (TCXO) is a key fundamental component that ensures the stable operation of satellite signal acquisition, tracking, and positioning calculations.

TCXO is the 'Frequency Reference Core' of GNSS Positioning Systems

When GNSS positioning chips receive BeiDou/GPS satellite signals, they need to perform down-conversion, correlation demodulation, and code phase tracking on extremely weak RF signals. This process heavily relies on the stability of the local reference clock, and the TCXO is the core component that provides this highly stable local oscillator reference.

Frequency stability directly affects:

• Satellite signal acquisition time (TTFF)

• Carrier and code phase tracking accuracy

• Satellite locking capability in weak signal environments

• Accuracy and stability of positioning solutions

Insufficient reference clock performance can lead to a series of performance degradations, primarily in the following aspects:

YXC TCXO products feature a temperature stability of ±0.5 ppm, effectively suppressing the effects of temperature drift, enabling GNSS receivers to maintain stable satellite locking and reliable positioning in high/low temperature environments and obstructed conditions.

26 MHz – Mainstream Frequency Application in GNSS Positioning Systems

In BeiDou/GPS multi-mode positioning systems, 26 MHz has become a de facto standard frequency, widely used in GNSS modules, vehicle positioning terminals, handheld positioning devices, and IoT positioning terminals.

Typical Applications:

• GNSS modules and positioning boards

• Vehicle positioning terminals

• Handheld positioning devices

• Pet/livestock trackers

• Personnel positioning systems

System Value of YXC 26 MHz TCXO:

• Reduces GNSS cold start and hot start times

• Enhances acquisition sensitivity in weak signal environments

• Reduces interference from frequency offset on the carrier tracking loop

• Improves positioning stability in complex outdoor environments

YXC Provides TCXO Selection Guide to Help You Precisely Target Product Design – YSO510TP Series

YXC TCXOs utilize a high-precision temperature compensation algorithm and high-quality quartz resonators, maintaining excellent frequency stability even in complex environments. Choosing YXC TCXOs enables terminal manufacturers to achieve faster GNSS startup speeds, higher positioning accuracy and trajectory stability, as well as lower system power consumption and extended battery life.

The YSO510TP is a high-precision, high-stability TCXO launched by YXC, well-suited to meet the demands of GNSS positioning systems for high-accuracy, high-stability crystal oscillators. The key specifications of this series are as follows:

• Normal Temperature Frequency Tolerance: ±1.5 ppm

• Temperature Stability: ±0.5 ppm (-40℃ ~ +85℃)

• Frequency Range: 10 - 52MHz

• Packages: 2016/2520/3225/5032/7050, multiple size options available, supporting high integration and compact design

• Operating Temperature Range: -40℃ ~ +85℃

• Low Phase Noise, -135 dBc/Hz @ 1kHz offset, enhancing GNSS acquisition and tracking performance

• Fast Start-up, Low Power Consumption, reducing Time-To-First-Fix (TTFF), suitable for battery-dependent portable devices

With the trend of GNSS positioning applications moving towards high precision, high dynamics, and multi-mode fusion, high-stability TCXOs have become a critical foundation for system performance.

YXC will continue to focus on its multi-frequency, high-stability, and wide-temperature-range TCXO product portfolio, providing reliable and mass-producible clock solutions for GNSS positioning system terminals and intelligent devices, helping customers build more competitive end products.