Catégorie : Russian

Russian INTEL experiments

Yet another activity this weekend from the Russians

Signals heard on Saturday and Sunday 10/11 dec 2016 active on Friday 16 also

19374.0 USB 16/12/16
18239.0 USB 10/12/16 11:18
17462.0 USB 10/12/16 11:37
15961.0 USB 10/12/16 12:11
18591.0 USB 11/12/16 8:47 (0845z sked) sun
17414.0 USB 11/12/16 8:50 (0850z sked) sun  
16211.0 USB 11/12/16 8:55 (0855z sked) sun   
17462.0 USB 11/12/16 09:33
20718.0 USB 11/12/16 10:09
20093.0 USB 11/12/16 10:34
18239.0 USB 11/12/16 11:04

It’s not the first time they use that waveform, I called it « стра́нный-E »

5 x mFSK-16 (br:10Bd sh:20Hz) w/ 250Bd BPSK 520ms breaks every 10.12 secs (carrier changes from 2250Hz to 1000Hz) – there are 96 mfsk tones between the bPSK bursts = 9.6sec of data

21123.jpg

This time the specific preamble & tail were sent, shown below:

preamble:

786578.jpg

tail:

87775

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Russian INTEL experiments

Yet another activity this weekend from the Russians
Signals heard on Saturday, 26 and Sunday, 27 2016 with the same cycle:

 0900z 20834.0 USB
 0910z 19649.0 USB
 0920z 18303.0 USB
 0930z 16076.0 USB
 0940z 14477.0 USB
 0950z 13494.0 USB

It was a mFSK-16 at 66Bd, for ~4min30s, no specific preamble (direct mFSK-16 waveform start at 09×0 UTC)

005

It’s not the first time they use that waveform, I called it « стра́нный-C »
Previously heard at 16.5Bd, 33Bd & 132Bd

archive

update: November, 30
16.5Bd variant data for 6 minutes long

1300z 10174.0 USB
1320z 9243.0 USB
1340z 7663.0 USB

update: December, 1
132Bd variant data for 2min 45sec long

1200z 11557.0 USB
1210z 11083.0 USB
1220z 10161.0 USB
1230z 9267.0 USB
1240z 8097.0 USB
1250z 7563.0 USB

update: December, 4
66Bd variant data for 4min 28sec long

0900z ? (missed) but nearby 20837
0910z 19673.0 USB
0920z 18306.0 USB
0930z 16099.0 USB
0940z 14496.0 USB
0950z 13498.0 USB

33Bd variant data for 3min 53sec long (see December, 1st)

1200z 11557.0 USB
1210z 11083.0 USB
1220z 10161.0 USB
1230z 9267.0 USB
1240z 8097.0 USB
1250z 7563.0 USB

&linkz

The Russian INTEL digimode experiments

RUS_digimode_trials_v5Here is a sheet showing what I have already spot from them
more to follow…

jan 2016 update:
another version of « стра́нный-C » has been spotted using ~131.5Bd, along with the wide 2×64 tone OFDM (zero beat at center)

Apr 2016 update:
a variant of « стра́нный-D » has been spotted on 19, April 2016, I named this as « стра́нный-G » from now (BPSK 250Bd breaks were replaced by FSK 125Bd with 62.5Hz/250Hz & 500Hz shifts)

nov 2016 update:
another version of « стра́нный-C » has been spotted using 66Bd, no preamble
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The Russian INTEL digimode experiments

RUS_digimode_trials_v5

Here is a sheet showing what I have already spot from them
more to follow…

jan 2016 update:
another version of « стра́нный-C » has been spotted using ~131.5Bd, along with the wide 2×64 tone OFDM (zero beat at center)

Apr 2016 update:
a variant of « стра́нный-D » has been spotted on 19, April 2016, I named this as « стра́нный-G » from now (BPSK 250Bd breaks were replaced by FSK 125Bd with 62.5Hz/250Hz & 500Hz shifts)

&linkz

yet another oddity from the Russians (FSK reversals)

Again, the Russians were active on HF using an unknown & weird waveform
That time it’s only FSK reversals with uncommon settings (I’ve measured 16.1Bd with a 1000Hz shift, sent with an offset AF +1500Hz)

2 cycles were identified on 31 october 2015 (confirmed 1 week later, 7 nov 2015), as sked, every 5 minutes and TX lasts for exactly 3 minutes (time in UTC, frequencies in USB):
revs_sked2

The TX had spurious images on each sides of its main frequency, as seen on the DIGIMODE experiments recently spotted (https://radiomonitoring.wordpress.com/2015/11/01/the-russian-experiments-hf-digimode/), which suggests a relation between the 2 activities
revs_spurs

revs_start

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The Russian experiments (HF digimode)

The Russians (prob INTEL) are back into DIGIMODE experiments on last days..

That waveform has been spotted on (at least) 5 frequencies in 2 days, 30 & 31 october 2015
short description of the waveform : 5x mFSK-16 (br:20Bd sh:20Hz) w/ short 250Bd BPSK breaks every 10 secs (carrier changes from 2250Hz to 1000Hz, randomely?) + 1750/1500 tone sequence as EOT
PS: the EOT tone sequence is the same heard on other Russian digimode experiments

That modem trials were already active in 2013 and I’ve made a video of it in the past:

exper
6863

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the Wide 4-FSK net & K4MT/NT9P related ?

This morning I’ve spot « K4MT/NT9P » net on 14978 cf (0806z) then I follow their QSY to 9300 cf.. They were active for some time on this frequency with a none-standard « wake-up » FSK sequence (50/500).

But, some minutes later, the wide russian 4-FSK (150/12000) net came on frequency with 2 odd setting variants, was it a coincidence ?


Some screenshots of the wide 4FSK variants:
9300-01
order: carrier (9300kHz) >> usual 4-FSK 150Bd/4000Hz >> odd status >> usual 4-FSK
9300-02
zoom on the odd status

They came a bit later with a narrow 4-FSK:
Narrow4-FSK_variant
SA measured it at 24.9Bd with a shift of ~666.82Hz and it shows a BW of 2000Hz

I assume it is 4-FSK 25Bd with 666.67Hz shift because:

standard baudrate 150Bd / 6 = 25Bd
standard shift 4000Hz / 6 = 666.67Hz
standard bw 12000Hz / 6 = 2000Hz

The factor 6 on the original waveform seems plausible.


And now the screenshots of K4MT/NT9P session:
K4MT_19sep15

25vs50
2 synched signals of the known K4MT/NT9P « wakeup » sequence (FSK 50/500)
upper one is the one spot today, showing a narrow 25Bd fsk with a shift of 83.4Hz !?
lower one is their standard 50/500 fsk

OH OH wait! wait!
standard shift 500Hz / 6 = 83.4Hz !

Again that factor 6 !

25vs50-zoomedZoom of the switch part, just to confirm that the content is the same on both mode settings (but was reverted in that case)


I’m not 100% sure both nets are related, as we don’t know a lot of things about the wide 4-FSK net, except it runs some fixed skeds, it has sometimes multiple streams at same time on different frequencies and it’s a long long long time active net (many decades on HF). K4MT/NT9P a short name to describe the net, has been rarely spot using skeds, but still has, it’s a bit obscure net too, running full duplex, sending what I call a « wakeup » sequence for some minutes, sending 5FGs in Baudot with a text separator each 50 groups when linked, also using CW for operator chat coordination purpose.

It would be a good point if we are now capable to say both net are 1 unique net ?

Note: 9300kHz is already a known freq see:
https://radiomonitoring.wordpress.com/2014/10/04/9300-baudot-200bd-then-wide-mfsk-4/

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the « =x0= » net aka « K4MT/NT9P »& others

Strong activity today from this still unid Russian? net:

K4MT_24dec

1st mode of traffic:
Station sending an unid 50/500 SYNC fsk mode for some minutes, (ACF shows peaks at -64,+128,-192,+256…). This mode sounds repetitive and according to the bit stream, it’s mirroring the bit steam datas like:

10011101 01100001 01110001 10110100 1000100110010101 00000010 00001000
01100010 10011110 10001110 01001011 01110110 01101010 11111101 11110111

BTW: Trying to decode that mode in an ASYNC Baudot decoder returns « rt~bzl26~~~~  » strings

2nd mode of traffic:
Station sending 5FG (10x per line) w/ Baudot 50/500/i
Each 50 groups, the concerned lines are finished by « =50= », « =100= », « =150= », « =200= » …

3rd mode of traffic:
CW op chat, for some coordination purposes after the groups being sent (this net uses duplex mode of traffic) – QSX has been often spotted with a 4MHz frequency difference

Callsigns heard so far here: NT9P K4MT PI2W TYA1 9PNT KXI9 VL8D
This net also uses an unid 25Bd/500Hz fsk

&linkz