BK 2650 printer emulator/downloader26.dec 2010
The BK Precision 2650 spectrum analyzer provides two ways to download spectral data. The first one is in form of vector data - this format is easy for latter processing. Then there is a "Print" button. For $500 you can buy a portable printer PT 2650 or you can download the screenshots directly to your PC for free using my utility. This small program emulates the PT2650 printer and stores the bitmap data in BMP file.
Using this simple MS Excel application it is easy to download the spectrum data and display it directly on excel sheet in form of a chart. The visual basic script code parses all the data coming from BK Precision 2650 spectrum analyzer and stores the spectral values (level and frequency) in selected cells. On the screenshot you can see multiple scans - two that covers all the UHF/VHF frequencies and one with higher resolution in range 200 to 400 MHz. Just for better understanding, the vector data sent from spectrum analyzer look like this:
PARAM CF 1.6500G SP FULL RF -34dBm ST 0.3s POS RB 3M VB 30k SC 10dB/d TRACE 29,29,28,2a,28,28,29,29,29,29, 29,27,29,28,27,28,27,27,27,27, 28,28,28,28,28,28,32,4a,59,58, 5c,5c,53,3c,29,29,28,28,29,29, 29,2a,2a,2f,30,29,2a,29,29,2a, 2d,2a,2b,2a,28,29,29,2b,32,2b, 29,28,2a,29,2a,2b,2a,29,2b,29, 2a,29,37,38,2c,2a,2a,2a,2b,29, 2c,2d,2f,2e,2e,2d,29,2f,2d,2a, ...... ...... ...... 38,38,37,37,37,38,37,38,37,39, 38,38,39,39,39,39,39,39,38,39, 39,39,39,39,39,38,39,39,38,39, 3a,38,3a,3a,3b,3a,3b,39,39,3a, 3a,