Data Bursts 30.1915 MHz 30191.5 kHz 30.192 MHz [Via G8JNJ SDR] 16 Oct 2024

[R4002]

30.1915 MHz center frequency
Bandwidth 6 kHz, maybe 6.5 kHz or 7.0 kHz?
6K00F2D 6K00F1D
6K50F2D 6K50F1D
7K00F2D 7K50F1D

Received via G8JNJ SDR receiver in the UK.  Link to video clip below:

https://www.youtube.com/watch?v=PjyXQY42kOg

This is a unique one for me anyway.  I've logged data bursts on 30.155 MHz and various frequencies in the 26-28 MHz and 29.7 MHz - 30 MHz ballpark, plus more standard frequencies on regular old 30-50 MHz VHF low band. 

30.190 MHz is one of the 30 MHz remote control / wireless control telecommand frequencies available in Norway, power output is limited to 100mW and bandwidth is limited to 10 kHz.  So in a perfect world, 30.190 MHz center frequency, 30.185 MHz - 30.195 MHz. 

30.010 MHz
30.020 MHz
30.030 MHz
30.040 MHz
30.050 MHz
30.060 MHz
30.070 MHz
30.080 MHz
30.090 MHz
30.100 MHz
30.110 MHz
30.120 MHz
30.130 MHz
30.140 MHz
30.150 MHz
30.160 MHz
30.170 MHz
30.180 MHz
30.190 MHz
30.200 MHz
30.210 MHz
30.220 MHz
30.230 MHz
30.240 MHz
30.250 MHz
30.260 MHz
30.270 MHz
30.280 MHz
30.290 MHz
30.290 MHz
30.300 MHz

This does meet those requirements, since a 7 kHz wide signal is 30.188 MHz - 30.195 MHz (center frequency: 30.191.5 MHz).

In Spain, the frequency 30.195 MHz is allowed for RC R/C remote control radio control wireless control links telecommand - regulations permit  remote control, wireless command, wireless measurement, telemetry, telecommand.  500mW transmitter power output limit, ERP limit is 100mW (??)  10 kHz channel bandwidth, allocation 29 MHz / 30 MHz. 


29.710 MHz
29.720 MHz
29.730 MHz
29.740 MHz
29.750 MHz
29.760 MHz
29.770 MHz
29.780 MHz
29.790 MHz
29.800 MHz
29.810 MHz
29.820 MHz
29.830 MHz
29.840 MHz
29.850 MHz
29.860 MHz
29.870 MHz
29.880 MHz
29.890 MHz
29.900 MHz
29.910 MHz
29.920 MHz
29.930 MHz
29.940 MHz
29.950 MHz
29.960 MHz
29.970 MHz
29.980 MHz
29.990 MHz
30.035 MHz
30.045 MHz
30.055 MHz
30.065 MHz
30.075 MHz
30.085 MHz
30.095 MHz
30.105 MHz
30.115 MHz
30.125 MHz
30.135 MHz
30.145 MHz
30.155 MHz
30.165 MHz
30.175 MHz
30.185 MHz
30.195 MHz
30.205 MHz
30.215 MHz
30.225 MHz
30.235 MHz
30.245 MHz
30.255 MHz
30.265 MHz
30.275 MHz
30.285 MHz
30.295 MHz

The 30.190 MHz - 30.200 MHz channel limits don't quite work in this situation, but there's always the possibility that it is simply an off-frequency transmitter - either off-frequency from 30.190 MHz or off-frequency from 30.195 MHz. 

[R4002]

Data signals later noted on additional odd-offset frequencies

29.7415 MHz 29741.5 kHz

30.1415 MHz 30141.5 kHz

30.1915 MHz 30191.5 kHz

Frequencies could be listed as

29.741 MHz 29.742 MHz
30.141 MHz 30.142 MHz
30.191 MHz 30.192 MHz

Unknown source, although Russian military comms on 39.400 MHz FM (voice comms, YL reading series of numbers…also data bursts and audio-tone bursts on freq) and Russian land mobile comms on various VHF low band frequencies also noted active at the same time, 37.125 MHz FM, 37.225 MHz FM, 38.275 MHz FM  38.525 MHz FM, 38.575 MHz FM, 38.775 MHz FM, 40.125 MHz FM, 40.150 MHz FM and several others. 


30.155 MHz FM with FSK MFSK bursts also noted.