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playing with MARS-ALE v3.00 and FS-1052 DLP messaging
MARS-ALE is a Personal Computer based 2G-ALE Modem and Controller that in conjunction with a supported computer controllable HF SSB transceiver allows for HF ALE communications. MARS-ALE also provides...
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MS188-110: probe designation symbols D1-D2 and 200ms ACF
in a previous post I already talked about the way MS188-110 scrambler length affects the value of the ACF at certain data rates. Now I want verify the typical 200ms ACF of a 2400 bps data rate (short...
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(CIS) OFDM 64-tone QAM-16, 40Bd
this is an interesting burst waveform composed of a two-parts preamble phase and a data phase; bursts have a duration of 2800ms and are 980ms spaced.Preamble phase (pic. 1)Part one has a duration of 8...
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Unid PSK-8 Serial and non-standard LFM 2G-ALE (prob. Iranian source)
this transmission is composed of messages sent using standard MS188-110 Serial Tone waveform (the ones indicated as 3, 4 , 9, ...) and messages (as 9, 11, ...) transmitted using a MS188-110 like...
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05892.0 ---: Unid (prob. Austrian Mil) 1505 USB MIL 188-110 App.B 39-tone QPSK (11May16) (AAI)05892.0 OP00: Austrian Mil, AUT 1516 USB MIL 188-141 2G-ALE calling OC00 (11May16) (AAI)05892.0 OY00:...
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SkyOFDM 22-tone, 64Bd QPSK, 2KHz bandwidth
this modem can be frequently spotted after the 2G-ALE handshake between Finnish MFA stations, being used to transfer data. Probably its development is by Sky Sweeper team, hence its name SkyOFDM. From...
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STANAG-5511 (Link-11) SLEW: scrambler length and ACF value
Single tone Link Eleven Waveform (SLEW) is one of the modes defined within the Link 11 NATO standard. For SLEW, a single analog waveform is generated for the upper side band, the PSK-8 modulation...
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phase keyed signals, SA, and fake demodulations
Playing with a STANAG-4285 signal and SA (Signals Analayzer) I met some problems in understanding correctly the synchronization sequence pattern of this waveform: the solution is very simple indeed and...
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unid PSK-8 2400Bd burst waveform
this transmission was spotted on 6550.0 KHz/USB (16 May) at 2024 UTC and consists of a 3-bursts train: each burts has a duration of ~1048ms and the interval between two consecutive bursts is ~385ms....
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FSK 300Bd/850
This FSK signal has been heard on 6699.0 KHz (cf), manipulation speed is 300 symbols/sec (quite unusual) and the shift between tones is ~850 Hz (pics. 1,2)pic. 1pic. 2The transfer is continuous and...
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logs
06250.0 IABC: Italian Navy, I 1318 USB opchat with IDR, testing a faulty STANAG-4285 modem (17May16) (AAI)06300.0 AVE: Unid Italian station 0920 J3E/USB op-chat with ROMA, QSY 5800.0 (20May16)...
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DSSS (Direct-Sequence Spread-Spectrum) as a reason for the 'unid PSK-8 burst...
This burst signal, spotted same days ago on 6550.0 KHz/USB, has already been studied in this post. In short, it consists of a 3 x 1048ms bursts transmission, each burst consists of a preamble followed...
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STANAG-4538 modified BW5
This signal employs 8-ary phase-shift keying (PSK-8) on a single 1800 Hz carrier, the modulation of this output carrier is a constant 2400 symbols/secs waveform: a quite common mode largely used in HF...
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unid MFSK-16 175Hz modem, varying speeds
This 16-tones signal occupy a bandwidth of about 2700 Hz, from 385Hz of the lower tone to 3010Hz of the top tone (dF = 2625Hz), with 175Hz increment steps as shonw in pics. 1,2:pic. 1 - spectrum of the...
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logs
06059.0 ---: Unid 2103 (cf) FSK 100Bd/1000, no traffic (02Jun16) (AAI)06262.5 IDR: Italian Navy, I 0650 USB STANAG-4285 600L, sending encrypted data using KG-84 to IHMW (26May16) (AAI)06801.0 D20:...
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CIS MFSK-16 175Hz (updated)
This 16-tones signal occupy a bandwidth of about 2700 Hz, from 385Hz of the lower tone to 3010Hz of the top tone (dF = 2625Hz), with 175Hz increment steps as shonw in pics. 1,2:pic. 1 - spectrum of the...
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Australian MHFCS net, a distinctive sign
Just a tip: in order to identify the MHFCS transmissions, in addition to the dial frequencies listed here (remember that they use a 1500Hz offset above the indicated carrier) and to the shift and...
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Unid MSK 1200Bd 800Hz
Yesterday (10 June) morning I spotted this weird signal on 20877.0 KHz/USB at 0725 UTC, unfortunatelly some statics due to a thunder storm ruin the reception.The signal has a 1200 Hz bandwidth and is...
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Arcotel MAHRS-2400 serial (Telefunken Racoms)
[updated]This signal has been heard several times, this one on 12282.5 KHz on USB at 1430z. An old WUN publication (http://www.udxf.nl/WUN-v10.pdf) and some other logs report the 12282.0 and 12282.4...
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MS188-110 poor man ASCII-bit stepper simulator (I)
thepoor-man ASCII-bit stepper simulator implements a fixed-frequency serial (single-tone) waveform as speciefied in MIL-STD 188-110B 5.3, it only supports the 1200/2400 bps data rate and short...
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