diario SWL I-56578 Antonio

Following my previous post, a colleague reached out asking for clarification on the real-world, non-simulated operations of Data Terminal Eq...

Dealing with phase ambiguity and bit shifting in a demodulated BPSK/QPSK bistream are two of the most common obstacles that prevent you from...

Sometimes it may happens to come across signals for which - unless of know it a priori - it is difficult to correctly define the used modula...

updated Unid signal noted on 7005 KHz/USB, "patterns" are sent each 1328 ms and have a duration of 672 ms (2000 ms cycle). Transm...

Below an interesting article by SergUA6 (RIP) from radioscanner.ru about MSK, GMSK, SDPSK, and OQPSK: more info and examples here: http://si...

Most likely modem instability is the cause of the distortion in the manipulation speed (~42 bps), as it's evident in SA raster. ...

WARNING: some of the recent posts have links to the "meetings & presentations" section of the High Frequency Industry Associ...

Finally a useful and fast tool to check the presence of T207 encoding in FSK bitstreams. The tool T207_test runs on Octave, a programming ...

Few days ago, 16 March, I spotted on 7703.0 KHz/USB (cf 7704.8) a transmission consisting of 30 unmodulated tones, 100Hz spaced, lasting 2...

The heard communications concern a Maritime Interdiction Operation (MIO) in Mediterranean sea and involve 2 vessels and one ashore s...

This is a workaround to get a spectrum-analyzer tool for people like me who run 32-bit PC (real spectrum-analyzer need 64-bit systems). ...