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About CIS-3000, possibly a counterpart of NATO ALE ?
The so-called CIS-3000 is a single 8-ary PSK-modulated 2000 Hz carrier (pic. 1) and it's nick name is just due to its constant 3000 symbols/sec waveform. This single-tone signal provides a teoric limit...
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logs
05410.0 4202: Sonatrach, ALG sounding 2116 USB MIL 188-141 ALE sounding (02Mar16) (AAI)05410.0 4245: Sonatrach, ALG sounding 2117 USB MIL 188-141 ALE sounding (02Mar16) (AAI)07607.0 ---: Unid 0922 AM...
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Sending files using MS188-110A and FED-STD 1052 App.B (H520) Data Link Protocol
FED-STD-1052 Appendix B (FS-1052B) specifies a first generation Data Link Protocol (DLP) layer with priority messaging and multiple pre-emptive resume queuing ARQ (it is basically the equivalent of...
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Turkish Mil, FSK 600Bd/400Hz & 1200Bd/800Hz KG-84C
weak signal heard on 10551.0 KHz/USB 0805z, variant of the more frequent 600Bd/400 reported here. The low quality of my recordings does not allow its demodulation and then further investigations to...
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Unid 5 x MFSK-16 20Bd 20Hz channels with BPSK 250Bd inserts
this interesting signal has been heard on 13497.0 KHz and 15812.0 KHz USB on 30 October (from 1300z to 1330z) and on 15845.0 KHz USB on 18 March (from 1300z to 1320z).The most interesting feature are...
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SYNC or ASYNC, that is the question
(Hamlet, famous ancient prince and analyst)Although a bitstream analyzer recognizes physical or data-link layer protocols by matching known patterns and sequences, it isn't source-coding aware then in...
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CIS 5 x MFSK-16 + BPSK 250Bd Hybrid modem (II)
Just to point out some interesting analogies with a similar MFSK-16 signal, heard in the latest days of the past September 2015.That signal had the same MFSK parameters, 5 x 16 tones 10Bd 20Hz, but...
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Japanese Military, MSK-30 +2 (mutichannel hybrid modem)
For several days, at a frequency of 12384.0 and 16553.0 kHz on USB (16553.0 is a constant for the Japanese MIL 8 freq signal), we heard unmodulated carriers only, and then finally they went to the...
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logs
02767.7 ---: Unid 2354 (cf) FSK 1200Bd/850 (19Mar16) (AAI)08060.0 BS008CB: Macedonian Mil, MKD 0740 USB MIL 188-141 link setup with CS003A then into MIL 188-110A serial sending files via FED-1052 App.B...
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SVO SiTOR-B: a curious feature
SVO Olympia Radio (formerly SVA Athinai Radio) belongs to Hellenic Telecommunication Organization, S.A. (OTE) and is a telecommunications network that serves the needs of maritime security sector as...
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unid FSK 100Bd/500, 40-bit (400ms) ACF
16340.1 ---: Unid (prob. Russian) 1014 (cf) FSK-2 100Bd/500, strong ACF 400 ms (25Mar16) (AAI) Probably an "old" RTTY transmitter sending the same pattern as a frequency marker.
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CIS MFSK-68 (34+34): new tests?
It seems that the CIS MFSK-68 protocol is constantly being modified and added new modulations. The "standard" waveform consists of 68 tones (2 x 34) 47 Hz spaced, each 1 second are sent 10Khz-wide...
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unid 2400Bd PSK-2 burst waveform (SAT Telemetry downlink?)
This signal was heard at 1245 UTC on 12168.0 KHz/USB on March 30th.The burst waveform use a PSK-2 (prob. DBPSK) serial tone modulation of an 1800 Hz carrier at 2400 symbols per second (pics 1 and 2)....
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CIS-112 OFDM 22.22 Bd BPSK, stream-mode
other than theπ/4 DQPSK burst mode, CIS OFDM 122-tone can be met also as a stream-waveform where all channels use BPSK modulation as part of the basic QPSK in the absolute constellation. The 22.22Bd...
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logs
05824.0 HBM46: Swiss Military SUI 0645 VFT 2x 100Bd/170 (channels cf at -500, +500Hz) (08Apr16) (AAI)06367.3 ---: Unid NATO 0650 NATO-50 50Bd/850 (08Apr16) (AAI)06510.0 S1L: Slovakian Mil, SVK 0643 USB...
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odd CRC error (in a good signal)
Some days ago, just to spend some time, I was listening to loud and clear HFDL messages exchanged between the ARINC ground station of Al Muharraq and some aircrafts. No problems for decoding all the...
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Nokia Adaptive MSG-Terminal, FSK 301Bd/780
heard this morning (April, 13) on 10226.8 KHz (cf) at 0814 UTC: only one transfer, maybe due to bad propagation? Signal is an FSK-2 modulation at 301 Baud and 780 Hz shift (pic. 1), most likely from...
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MS188-110C App.D waveform 0 (Walsh) and 7 (PSK-8)
Both the two signals A and B have the same duration and both have a long preamble-segment followed by the data-segment. The signals spread ~3KHz bandwidth and consist of a 1800Hz carrier with PSK-8...
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email over HF using STANAG-5066 DTS: a more interesting example
This recording is another example of sending compressed e-mail file using STANAG-5066DTS and the MS188-110A serial waveform as "carrier" at physical layer: while the previous recording was relative to...
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logs
05320.0 ---: Unid 0621 USB STANAG-4197 (08Apr16) (AAI)07102.0 9A0MIL: Global ALE HF Network Zagreb, HRV 0613 USB MIL 188-141 2G-ALE sounding (15Apr16) (AAI)08010.0 ---: Ukraine Mil, UKR 0620 (cf)...
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