UXR Test Report 1: Ultra-low Noise Floor
Last month , UXR released a 10-bit ADC
13GHz to 110GHz full range of real-time oscilloscopes
Became a well-deserved screen star
Many friends also set it as
The ultimate dream weapon for a siege lion career
Today, we finally have a real 33GHz machine in front of us.
Let's follow Li Kai and do it together
Ultra-low noise floor for this UXR oscilloscope
Let's have an extreme exploration
【Li Kai】 Graduated from the Department of Optoelectronic Engineering of Beijing Institute of Technology with a master's degree. An application technology expert at Keysight Technologies (formerly Agilent Technologies), he has more than 15 years of experience in the communications and measurement industry. He is mainly responsible for the application and research of high-speed circuits and systems, and has been involved in the project development of multiple data communication and wireless communication products.
Click on the video to reveal the exploration process
in conclusion:
From this video, you can see that with the same bandwidth and range, the background noise of the UXR real-time oscilloscope is only half of that of other similar products, which provides the strongest support for high-frequency and small signal measurements.
Knowledge DevelopmentDiscovery
The background noise of the oscilloscope and even the entire measurement system will have a great impact on the eye diagram, jitter, power supply ripple, broadband signal demodulation analysis, etc. of high-speed signals.
The background noise of a real-time oscilloscope mainly comes from thermal noise, the noise coefficient of the front-end amplifier/attenuator, and the quantization noise of the ADC. Because high-bandwidth amplifiers and attenuators have extremely high requirements for technology and process, some high-bandwidth oscilloscopes on the market omit these key components, but the price paid is that the available range of the oscilloscope is very small.
The UXR series oscilloscopes include:
1. Standard full-bandwidth amplifier and attenuation circuit, which can support input range from 1mv/div to 1V/div within the full bandwidth
2. Excellent InP material performance and Faraday shielding cavity design
3. Innovative use of 10-bit ADC technology on ultra-high bandwidth oscilloscopes.
This enables it to have excellent background noise indicators over a very large range.
Since the noise floor is so important, how do you evaluate the noise floor of an oscilloscope?
The background noise of a real-time oscilloscope is closely related to the input range and bandwidth. Different oscilloscopes should be compared under the same bandwidth and input range. The larger the range supported by the same oscilloscope, the more flexible its application scenarios. Because noise follows a Gaussian distribution, random phenomena such as vertical noise should be defined and measured using RMS (root mean square) values for this reason.
Proceed as follows:
1.
Open channel 1, turn off bandwidth limit, and set the vertical range to 1V/div, 100mv/div, 20mv/div, 5mv/div. It is best to connect a 50 ohm load to the input end.
2.
Set the time base range to 100ns/div and the sampling rate to a maximum of 128GSa/s.
3.
Open the measurement function of the oscilloscope and select voltage RMS-AC measurement.
The first phase of exploration was a complete success!
Next two issues Actual spy reports
I will continue to lead you to explore UXR, so stay tuned!
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