Clik here to view.
an interesting SiTOR-FEC log
Egyptian MFA (Ministry of Foreign Affairs) for their communications mostly use:- SiTOR ARQ 100/170 (offset 1700Hz)- Codan 80bd chirp mode (offset 1500Hz)- Codan 9001/3012 16 tone 75Bd QPSK (offset...
View ArticleClik here to view.
'Arcotel MARS 2400' and 'THALES TRC-1752': same PSK-8 2400Bd, same 468 bits...
Single tone PSK-8/2400Bd waveforms are very common and it'seasy to get mistakesin theiridentification, sometimes also their ACF values are equal and so things get complicated (it could also happen that...
View ArticleClik here to view.
logs
06378.0 ---: Australian MHFCS net, AUS 2250 ISB FSK 600Bd/340 (06Jun16) (AAI)06733.0 IDR: Italian Navy, I 0710 USB/J3E calling ORALE, PILONE, BUSSOLA (14Jun16) (AAI)06745.5 FS01: Algerian Mil, ALG 2130...
View ArticleClik here to view.
CIS-112 preambles
In this sample, recordered today on 16311.0 KHz/USB starting from 0654 UTC, the bursts are probably used as a sort of selcall or wake-up signaling before sending the data. The parameters of the two...
View ArticleClik here to view.
MIL 188-110B App. C (STANAG-4539 Annex B)
in this recording a MIL 188-141 2G-ALE link setup between ALE calls 5CIND2 and 5CIND1, and two MIL 188-110B App.C 4800bps short sessions for data transfer. The Appendix C of MIL 188-110B describes the...
View ArticleClik here to view.
Russian Air Force "Chayka", FSK 150Bd/500
This transmission was heard this morning on 14781.1 Khz (cf) at 0720 UTC sending encrypted bursts of ~21 secs duration. "Chayka" is the nick name for this commands/signaling FSK messaging system used...
View ArticleClik here to view.
Siemens CHX200 F1-modem (CHP-200): FSK 249 & 250 Bd /170 Hz waveform
The CHX200 F1-modem (also known as CHP200 or CHP-200, i.e. the name of the embedded comunications processor) has been built in Germany by Siemensand under license in Indonesia (for domestic use). It...
View ArticleClik here to view.
HF CRY-2001 (Sailor-2001) analog voice scrambler
HF CRY-2001 (Sailor-2001) uses basic rolling code inversion, the transmitted audio bandwidth is split, inverted and spaced separately at an audio frequency point which changes with each over. The short...
View ArticleClik here to view.
logs
02815.0 ---: Unid 2050 (CF) STANAG-4481 FSK 75Bd/850 (20Jun16) (AAI)05824.0 HBM46: Swiss Military SUI 2154 VFT 2x 100Bd/170 (channels cf at -500, +500Hz) (30Jun16) (AAI)06446.0 ---: Unid (prob. fishing...
View ArticleClik here to view.
unid MFSK-4 160Bd 320Hz waveform
Quite strong signal heard for a long time on 9099.6 KHz (cf) on 02 July and recordered via the well known remote SDR receiver running at the Dutch University of Twente (aka TwenteSDR): thus the...
View ArticleClik here to view.
"T-207" recognition in CIS VFT systems
Some days ago I heard some CIS VFT systems and in particular one of them, a six 100Bd/120Hzchannels, caught my attention. I already logged it but sent its main parameters as speed, modulation and...
View ArticleClik here to view.
"Serdolik" 40Bd mixed mode: OFDM 45 and 60 tones, MFSK-31, and a pich of FSK
One of the numerous variant of the nicknamed "Serdolik" system heard on 11469.0 KHz on USB. Such composite signals are not frequent in the air but sometimes, and fora short period ofdays, they spring...
View ArticleClik here to view.
summer logs
05410.0 3127: Sonatrach, ALG 2152 LSB MIL 188-141 2G-ALE sounding (11Jul16) (AAI)06592.0 ---: Moscow Radio, RUS 2136 J3E/USB working 7882 (phone patch request) (11Jul16) (AAI)06759.0 ---: UK DHFCS, G...
View ArticleClik here to view.
(Unid) PSK-8 4800/2400Bd & OFDM 15-tones QPSK Hybrid Modem
This is an example of a "teamgroup" analysis: the signals were originally spotted by KarapuZ, then analyzed together by me, cryptomaster and IK1YDE: the discussion can be read here ("ansanto" is my...
View ArticleClik here to view.
unusual FSK 50Bd 40Hz
quite unusual FSK signal heard by my friend KarapuZ on 14581.0 Khz on USB: such shift (40 Hz) is rare on these high frequencies. ACF not measurable (=0). Thanks to KarapuZ for sending me the record.
View ArticleClik here to view.
PacTOR-II, modulation changes
In this examples (recordered on 16285.0 KHz/USB) the PacTOR-II modem exhibits the ability to adapt its modulation method (and data rate) dynamically based on channel conditions or on current needs (ie...
View ArticleClik here to view.
STANAG-4538 complete session
15945.0 ---: Unid 0918 UTC USB, STANAG-4538 Fast Link setup (FLSU) burst followed by Low rate Data Link (LDL) forward transmissions (BW3, fig. 1) and ACK bursts. The transfer session end is signaled by...
View ArticleClik here to view.
Clik here to view.
HDL+ (a proposed enhanced protocol for STANAG-4538)
At a first glance this transmission resembles the STANAG-4538 forward+ACK structure, but the lengths of the bursts and their frame formats do not match the ones specified for the HDL and LDL protocols....
View ArticleClik here to view.
logs
04906.0 HBM46: Swiss Military, SUI 0645 VFT-TMS430 2 x 100Bd/180 (channels cf at -500, +500Hz) (02Aug16) (AAI)05824.0 HBM46: Swiss Military, SUI 0650 VFT-TMS430 2 x 100Bd/180 (channels cf at -500,...
View Article