Gpsdo GPS Tame Clock 10MHz Usrp High-Precision Clock B210

• Type: Development Board
• Certification: None
• Demo Board Type: Arm
• Trademark: Waveshare
• Origin: China, Mainland China
• Model NO.: GPSDO GPS tame clock

Product Description

 

 

The basic version of Price 1999 is aimed at most users, and can realize PPS signal output and accurate 10Mhz frequency output after training
The advanced version with price of 5999 is applicable to users with special needs. It converts and outputs GPS information on the basis of all functions of the basic version, and implements the NMEA protocol to enable syn of UHD code_ to_ GPS, and TIMESTAMP function in GNURADIO
Compared with the official locking time of about 10 minutes, our locking time is about 1 minute
Compared with the official working current of about 170MA, our current is only about 60MA

 

The product has been improved and can be delivered. This page is constantly updated. If you have technical problems, you can contact Mr. Li through customer service
We know that China's Beidou, the United States' GPS and Europe's GNSS are all global positioning systems In addition to the global positioning function, there are also two functions related to time: 1. time service of standard time, and 2. output PPS as synchronous second signal once a second
Specifically, the PPS synchronization second signal has two characteristics
1. In an ideal state, the rising edge time of the output second pulse of all such modules in the world is exactly the same (but there is an error of several nanoseconds to tens of nanoseconds)
2. The interval between two PPS second impulses is strictly 1 second
The first feature mentioned above is generally used for wide area synchronization. We need to do things with a second signal synchronization. In practice, the feature of 1-second interval between PPSs is the most widely used
Not all GPS modules have the PPS function Different GPS modules have different application scenarios for positioning when they are designed. Generally, they are divided into three categories: ordinary cheap modules, such as the positioning in our common mobile phones and the GPS modules for a few yuan; There is a special focus on centimeter level precision positioning, such as the positioning used by UAV teams; There are applications that focus on time. Here we use strict PPS requirements as an example
More specifically, the time interval between the two adjacent rising edges of the PPS is exactly 1 second. This standard 1 second can be used to adjust the output frequency of the frequency controlled oscillator The specific implementation is to use the number of pulses of the technical oscillator between the rising edges of the two PPS. If the actual count is higher than the theoretical frequency value, it needs to be fed back to the controllable oscillator in some way to lower the input frequency; If the actual count is lower than the theoretical frequency value, it needs to be fed back to the controlled oscillator in some way, and the input frequency is too high The oscillator with voltage control regulation is usually used here, and the feedback device mainly realizes voltage regulation through high-precision DAC If the above process is marked with a letter, it is the D in GPSDO. The word is disciplined, which means training and discipline in Chinese. So GPSDO is also called GPS tame clock In addition, because China's Beidou positioning system is also very perfect, if we accept the Beidou navigation signal to generate PPS to tame the clock, it can also be called Beidou tame the clock
By using PPS to tame the clock, we can count and reset the PPS once a second, which ensures the highest accuracy and ensures an error of one count (i.e., 1HZ) within one second. When multiple PPS can count once, such as counting and resetting the PPS once every 10 seconds, the highest accuracy can guarantee an error of one count (i.e., 0.1 HZ) within 10 seconds Therefore, we need to conduct acquisition every n seconds, and then adjust and tame the oscillator according to the acquisition results, which can be called a regulation cycle
From a macro perspective, we believe that the crystal frequency can be tamed to an ideal value by dynamic adjustment of the crystal oscillator for multiple periods On the micro level, the frequency offset generated by the crystal oscillator in each adjustment period depends on the performance of the crystal oscillator itself. We often use a constant temperature crystal oscillator or a temperature compensated crystal oscillator to minimize the frequency offset in an adjustment period
The performance parameters are listed in a table, and the notes are my notes and descriptions

 

 

 

 

Delivery list: (photos are not available here)
1. Embedded GPSDO module
2. Active GPS antenna with 3m cable
Warranty terms:
Return the goods unconditionally within 7 days
The goods can be exchanged within 30 days if they are not damaged due to improper operation
Any damage not caused by improper operation within 1 year can be repaired free of charge
Repair at cost within 3 years

 

 

 

 

 

 

 

 

 

 

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