Wednesday, December 28, 2011

SnaLY-160 (Scalar USB network analyzer)

Hardware used here is a mix of AD9951 (based on Pick a Star team‘s DDS VFO), Atmega8 firmware parts using libusb and DG8SAQ code. LPF by DL5MGD . Detector is taken from AD8307 datasheet.

Technical specification:
OS: WinXp, Vista, Windows7 (64 ir 32 bit)
Sweep range: 100 KHz – 160 MHz.
Generator range: 10 KHz – 160 MHz.
Output ~1,7 V pp on 50 Ohm load
Achievable measurement range -75... +17dBm (limited by AD8307 and construction)
Powered directly from USB (~70mA)
Software calibration function for linearization.

This tool is completely freeware with source code available for controller firmware and desktop software. Driver installation instruction.

Shortly about software.
I tried to make software intuitive – one can get used to it within minutes :-)
There are two markers controlled by left or right mouse buttons.
If mouse pointer is placed on dB window edge – amplitude measuring range may be expanded/collapsed using mouse wheel.

If you have questions/comments feel free contacting me:
Happy exploring (building/using)

73! Ċ½ilvinas LY3H

Thank LY3LP, LY2SS

Wednesday, December 21, 2011