diario SWL I-56578 Antonio

STANAG 4481 defines the minimum technical standards for Naval shore-to-ship broadcast HF communication. The standard describes three data mo...

My friend Mario often monitors the frequency of 9201.0 KHz/USB in search of "Akula" signals: he mainly uses a KiwiSDR receiver loc...

The waveform of STANAG-4415 is the same as the 75 bps waveform of 188-110 (MS-110), but the requirements of receiver performance in STANAG-4...

Since some days I'm following transmissions on 14693.0 KHz/USB consisting of exchanges of messages between two nodes, as the different f...

CIS FTM-4 (FTM stands for Frequency-Time Matrix) is an unknown Russian "domestic" system, also known as CIS 4FSK 150 Bd, using MFS...

This is a very interesting transmission heard on 14736.5 KHz/USB which consists of repetitive bursts lasting about 12.6 s and separated by a...

No, it's not a typo: this FSK signal (kindly sent me by my friend cryptomaster ) is really modulated at the speed of 6 Bd and 50Hz shift...

Thanks to my friend Mario, who recently sent me some recordings, I had the opportunity to study the Russian T-219 system, codenamed "Ya...

On December 13th morning I accidentally tuned a KiwiSDR receiver on the well-known frequency of 8437.0 KHz USB, i.e. the Dutch Navy CARB cha...

Just a quick note to observe that bitstreams using (alleged) 256-bit Initialization Vectors (IV) encryption have the same 32-bit/4-byte sequ...