VMA In case you were wondering were some of my inspiration for the SMA Simple Spectrum Analyser software came from: it came from my recently purchased Siglent SSA3021X! I always wanted to own a REAL spectrum analyser and Siglent made it possible by offering a real deal… For 1449 Euro (ex. VAT) you get a 9kHz … Read more
Hi, I left the SMA Simple Spectrum Analyser software running with the waterfall diagram in the large upper window, rendering the Astra 19.2E satellite. It takes about 20 Minutes to render the complete graph at 500 samples (500 lines). This was the result: The horizontal line shows where the waterfall graph is being updated. I … Read more
I have tried to measure three cables and this is the result: Interesting notes: The longer the cable, the smaller the interferences. This requires to set a smaller span in the spectrum analyzer. Unfortunatly at 100m cable length we reach the limit of the SMA Spectrum Analyzer’s resultion. To overcome this limitation (and because my … Read more
Hi, I just did some trials to use the SMA Spectrum Analyzer as a reflectometer using my software (see previous post). You need: 1x SMA Spectrum Analyzer 138MHz-4.4GHz 1x Noise Generator – I used the cheap BG7TBL one (20 Euro at eBay) Cables and adapters The setup is shown in this picture: Using my software, … Read more
Hello, You can now download my SMA Spectrum Analyzer software from here: http://s000.tinyupload.com/?file_id=87615266502670636057 Chrome will complain that it is a “dangerous file” and block it. You can, however, still access the file. To make sure you really got the correct file, please confirm the CRC32. It should state 9C6CD1E3. To run the application, you will … Read more
Check out my new video, showing off the latest version of my software for the “138M-4.4G USB SMA signal source/signal generator/simple spectrum analyzer”. Update: Latest version: http://vma-satellite.blogspot.pt/2016/12/vma-simple-spectrum-analyser-new.html Cheers, vma
Here I am in Birmingham (UK) for a business trip and of course I brought the essential “traveller’s radio spectrum analysis kit” with me: My new SMA Spectrum Analyzer 138MHz-4.4GHz A DVB-T/T2 USB receiver (PCTV nanoStick DVB-T2 292e) A DVB-T receiver with the RTL2832U/FC0012 chip and tuner, compatible with SDR# Two small antennas The result: With the … Read more
Hi, The latest toy I purchased is the infamous “138M-4.4G USB SMA signal source/signal generator/simple spectrum analyzer“, which is sold on eBay for 50-70 Euro with free shipping from China. I was curious about this device, as I did not own any spectrum analyser with a range up to 4.4GHz and for this price it … Read more
In my last post, I tested the cheap SMA Noise Source, which is sold on eBay for less than 20 Euro. To better show the applications of a noise source (sometimes called noise generator), today I used the Rover Instruments HD Touch STC meter – a top of the class professional meter. The left picture … Read more
On eBay, chinese sellers are offering what they call a “SMA noise source/Simple spectrum external tracking source DV 12V/0.3A”. I bought one to test it and here are the first results… I purchased such a device, as I was looking for a long time to have a noise source. These are handy to test and … Read more