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All posts by nuclearrambo

limesdr up converter

A simple HF up-converter with LimeSDR Mini

Based on my experience, the LimeSDR mini does not perform very well at the HF frequencies. The popular RTL-SDR also does not work so well at those frequencies. Attaching an up-converter is the most common solution if you wish to use RTL-SDR in the HF

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zynq vitis

Programming the Zynq 7000 with Vivado 2019.2 and Vitis

I purchased a Zynq 7000 development board recently and wanted to play with it for quite some time now. Finally, the lock-down due to the corona virus pandemic gave me some time to put my hands on Zynq SoC development. In the past, I had

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psa4-5043+ gain

Measuring noise figure using Gain Method

For those into radio astronomy would know the significance of having ultra-low noise figures. Lower the noise figure, the more sensitive your receiver becomes. Noise figure is a unit of measure that tells us how much noise, for example, your amplifier is adding to the

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em simulation feature image

EM simulation over a PCB designed by you

Doing electromagnetic simulations on your PCB layout can be a difficult task. The main reason being the tremendous effort required in porting your PCB layout data over to the 3D EM simulation software. Fortunately, new updates to the EM solver tools have made our work

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neje dk bl laser

NEJE DK-BL 1500 laser engraving tool review

Laser engraving can be a fun pass time. If you often create art, a laser engraving machine can help you put that design onto a piece of wood or cardboard. Burning your artwork on a piece of wood gives a very special kind of appeal

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Radar Beamforming to track target

The Matlab phased array toolbox is a collection of many interesting algorithms and functions. With so many tools at your disposal, the phased array toolbox lets us build a complete end to end radar system. I tried the phased array toolbox for the first time

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Transferring a text file over the air with LimeSDR mini

We have seen the LimeSDR mini several times on this blog. So far, we have only seen how it can generate analog modulation to transmit voice and what not. Being an SDR capable to transmit practically anything, we can even transmit binary data. Speaking of

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Building an automatic gain control (AGC) circuit

Most amplifiers we use have a fixed gain. In case of excess input power, the amplifier saturates. As a result, the blocks down the receive chain also get affected by this. To avoid this, the preferred technique is to reduce the gain of the amplifier

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