Sign turbines are one of the vital vital instruments for a lot of electronics engineers. When designing and testing a radar or different RF methods, a low noise, low distortion supply able to producing excessive frequency is crucial to troubleshoot or debugging a system. One of the widespread items of kit in an RF take a look at lab is a synthesized RF sign generator. Synthesized RF sign turbines are commonplace tools however typically require further filtering when low distortion or low broadband noise is required.
Picture of EVAL-CN0511-RPIZ Analysis Board
However, high-quality, high-frequency turbines don’t come low-cost, so in case you are like most of us who’ve restricted sources or desire constructing your individual tools, then within the article we’ll see a reference design of an entire DC to five.5 GHz sine wave sign generator primarily based on a direct digital synthesis (DDS) structure.
EVAL-CN0511-RPIZ is a reference design from Analog Units which solely requires a further R-Pi for operation. The RF digital-to-analog converter (DAC), managed utilizing a 100 MHz Serial Peripheral Interface (SPI) from the RPi, permits for single-tone, section coherent, and quick frequency hopping throughout the spectrum.
The reference design doesn’t require any further clock supply as an onboard crystal oscillator is used to fulfill all of the clocking necessities. Furthermore, all the mandatory energy can be derived from the Raspberry Pi microcontroller, with ultra-high energy provide rejection ratio (PSRR) regulators and passive filtering to reduce the impression of the ability converters on RF efficiency. The reference design is a compact, low-cost, sign generator that provides correct output energy and huge bandwidth corresponding to that of business benchtop sign turbines.
Options of The Reference Design
• Helps RF sign synthesis as much as 5.5 GHz
• +/-0.5 dB calibrated output energy throughout the working bandwidth
• From 0 dBm to -40 dBm
• Excessive dynamic vary and sign reconstruction bandwidth
• Totally helps zero intermediate frequency (IF) and different dc-coupled purposes
• On-board free-running 122.88 MHz precision oven-controlled crystal oscillator (OCXO)
• Options low output ripple with low output capacitance
This reference design has been examined by Analog Units. The corporate has additionally offered further sources reminiscent of schematics, gerber information, and so forth. You will discover further knowledge concerning the reference design on the corporate’s web site.
To learn extra about this reference design click on right here
