2023年7月9日 · In this blog post, I’ll first discuss the principles of a GPS Disciplined Oscillator (GPSDO), and then I’ll tear down the TM4313, a $95 GPSDO that I bought new from eBay. What is a GPSDO? A GPSDO uses two time keeping mechanisms with complementary characteristics to create the best of both worlds: a reference clock that is accurate both in ...

A GPS Discilipined Oscillator (GPSDO) combines the time-averaged stability of the GPS network with the low-noise characteristics of a Oven-Controlled Crystal Oscillator (OCXO). This is done with a frequency locked loop running on an Arduino Nano, which measures the frequency of an internal OCXO by with reference to an onboard GPS.

2021年6月20日 · Ettus Research提供了许多GPS约束振荡器（GPSDO）选项，可提高USRP软件定义无线电的频率精度，并使用GPS实现全球同步和定位。 GPSDO模块集成在USRP盒内，与USRP硬件驱动程序（UHD™）无缝配合,为了实现设备的全局定时对准、MIMO应用的相干操作、相控阵处理以及与外部设备（例如测试设备）的一般同步。 此外，大多数USRP设备接受外部PPS信号进行时间校准，以及10 MHz参考频率校准-这允许外部时间和频率源（如 OctoClock …

The GPSDO uses an arduino board (Mega2560) to provide display output (16x2 char display), control LEDs (for PPS, GPS Fix, PLL Lock and GPS faults), as well as USB serial output). Features for the GPSDO include 10MHz, 1 MHz and 10kHz reference frequency square wave outputs, plus a 10 MHz sine wave output (5 volt p-p @ 50 ohms).

2021年12月14日 · GPSDO是目前最值得信赖和精准的时钟源之一，结构一般由一个高稳定度的晶体振荡器和一个GPS接收器组成，因此也称作GPS驯服晶振（GPSDO）。 工作时，GPSDO以GPS/BDS接收机输出的秒脉冲信号为参考信号，通过信号追踪环路校正补偿恒温晶振（OCXO）的频率偏移，在不破坏晶振短期稳定性的前提下，把OCXO晶振的输出信号从10−7量级驯服到GPS设备或GNSS卫星信号的10^−12级别。 GPSDO的工作原理类似锁相环（PLL），有些GPSDO …

2022年3月24日 · 以下是运行两个 GPSDO 的 TC 为 4 的 TimeLab 结果，使用 Lars 的方法 #2 来确定最佳 TC（他的文档中的第 12 页）。 可以在 PPS 抖动（下降斜率）和振荡器漂移和噪声（斜率变平或上升的部分）的交叉斜率处找到最佳或 Lars 所说的“合理”TC。 请注意，两条曲线的斜率在 200 秒内几乎相同。 我怀疑这是因为 Trimble 从位于 Bliley GPSDO 中的同一个 NEO M8T 获得其 1PPS，因此 PPS 抖动是相同的。 使用 4 秒的 TC，DAC 都精确地跟踪 GPS 和 OCXO 偏 …

GPSDO, Global Positioning System Disciplined Oscillator, receives GPS satellite signals and outputs accurate and precise time pulse and reference frequency by controlling its own oscillator with precise time reference from GPS.

What is GPSDO (GNSSDO)? GPSDO, Global Positioning System Disciplined Oscillator, receives GPS satellite signals and outputs accurate and precise time pulse and reference frequency by controlling its own oscillator with precise time reference from GPS.

A GPS disciplined oscillator (GPSDO) is a GPS clock—it uses a GPS receiver and a stable, effective, high-quality oscillator to stay accurate with real-time reporting available within a few nanoseconds.

GPSDO (GPS Disciplined Oscillator), uses accurate GPS time signal to control clock equipment. This equipment uses GPS output 1 PPS to sync on board OCXO. Employs special algorithm to filter the GPS time jitter. Forces the OCXO clock output to lock onto GPS signal.