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cars, chameleons, networks, and other stories (part II)
In the first part of this post there were the cars, here are the chameleons: such name is not related to the ALE Addresses but rather to the configuration of the stations. A third part will follow in...
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Unid BPSK 1500Bd (prob. Chinese modem)
Unid modem (prob. Chinese origin) using BPSK modulation at 1500 Baud and 1500 Hz sub-carrier. Since the alternation of frames with different strength, this may be a duplex channel. fig. 1fig. 2fig....
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Turkish Mil, FSK 300Bd/400Hz KG-84C
Weak signal heard on 5115.5 KHz, central frequency, at 0549 UTC. Analysis with SA reveals an FSK signal running at 300Bd and 400 Hz shift.fig. 1fig. 2Once demodulated, the presence of the KG-84C 64-bit...
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Logs
03806.5 OE3XEC: Amsstetten AUT, 0754 WinLink traffic (23Oct16) (AAI)05115.0 ---: Turkish Mil, TUR 0549 (cf) FSK 300Bd/400, KG-84C encrypted (24Oct16) (AAI)05140.0 ---: Russian Mil (prob. AF) 0602...
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a (possible) 3G-HF multicast transfer with MDLN protocol
This burst-trasmision has been heard on 13505.0 KHz/USB at 1120 UTC (27 Oct). All of the burst waveforms use an 8-ary PSK serial tone modulation of an 1800 Hz carrier at 2400 symbols per second (fig....
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Unid PSK-8 2400Bd (ARQ) system
unid, possibly ARQ, system heard and tuned using the remote Twente-SDR on 5740.0 KHz/USB for a long standing time. The waveform used by S1 S2 stations is a 1800 Hz carrier which is modulated at...
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unid 3KHz/6KHz channel waveforms in Maritime Band
These are unidentified signals heard by me and my friend KarapuZ in the Maritime Band segments, mainly 8 and 12 MHz, during daylight. Transmissions are a mix of 3 KHz and 6 KHz wide channels (BW) and...
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STANAG-4538 3G-HF, HDL complete session
3G-HF HDL transfer heard on 10627.0 KHz/USB at 1258 UTCThe High-throughput Data Link protocol (HDL), defined in STANAG-4538, is a selective repeat ARQ protocol which can only be run in a point-to-point...
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Logs
08002.0 KHz/USB 1518 UTC STANAG-4538 HDL+ data transfer04926.0 KR4: Polish Military, POL 1827 USB MIL 188-141 2G-ALE calling ST8 (08Nov16) (AAI)04926.0 KR4: Polish Military, POL 1837 USB MIL 188-141...
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cars, chameleons, networks, and other stories (update)
6231-net (6231.0 KHz)I recently spotted the frequency 6231.0KHz on USB where stations connect following the same procedure as of AB-net and use STANAG-5066 HMTP protocol which is transported by a...
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R&S proprietary ARQ-protocol RSX.25 over GM-2100 HF modem
transmission received on 06450.0 KHz on USB at 0753 UTC. The ending part in MIL 188-141A, which terminates the link, reveals that the user is the Italian "Guardia di Finanza - GdF", ALE addresses are...
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FLSU/FTM protocol + 188-110A Serial: example of 3G/2G switching
This sample is a real-world example of 3G-HF Link SetUp protocol used in conjunction with a 2G MS 188-110 Serial waveform, it was copied and recordered on 9003.0 KHz/USB by my friend Mike Chace-Ortiz...
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Logs
04062.0 CM1: Unid net 2205 USB 188-141 2G-ALE calling CO1 flwd by voice call in French "Charlie Hotel respondrè"(23Nov16) (AAI)05280.5 ALA2: Unid net 0828 USB 188-141 2G-ALE calling ALEJA2 (24Nov16)...
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cars, chameleons, networks... (update 2)
[previous posts: Part I (OS BiH) , Part II (MORH HRV) , Update 1 (MORH HRV)]                                                        OPL-OPn net (5424.0 KHz)I have already talked here about this QRG,...
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unid FSK 150Bd/250 with KG-84 encryption
I copied this FSK modem on 06252.2 KHz (cf) on 7 December morning, carrying several messages with a very good signal strength here in JN52 (about 70 dB). The modem use a frequency shift of 250 Hertz...
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unid FSK 300Bd/500, 255/360 bit period
The signal was copied on 06775.0 (cf) at 0954 UTC of 7 December. The FSK-2 modulation exhibits a constant 300 symbols/sec speed and shift of 500 Hz (Fig. 1).Fig. 1The most interesting feature is the...
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unid FSK 50Bd/1000 (prob. CIS Navy occasional test)
Strong - and odd - signal copied on 12376.0 (cf) at 1423 UTC on 11 December. This is probably a totally occasional test since the used fequency and some other points as below. The signal exhibits...
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unid FSK 200Bd/400
Yet another unidentified, and unknown to me, FSK waveform copied on 12424.8 KHz (cf) at 0808 UTC. Key parameters are 200 Baud as manipulation speed and shift of 400 Hz (Fig. 1). These values match one...
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HARRIS proprietary Autolink-I (1G-ALE)
Very interesting ALE session consisting of HARRIS Autolink-I handshake (a proprietary waveform) followed by a data transfer using MIL 188-110 App.B 39-tone OFDM modem and link disconnect: since the...
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PSTN V-series modem over a radio link ?
This transmission has been copied on 6421.5 KHz/USB at 0808 UTC and consits of five parts:1) initial FSK 300Bd call and link negotiation, between the calling and the answering modem;2) PSK 1200Bd data...
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