Talk:Russian OTH 'Ghadir' type
that's Ghadir. 10m propagation is very good now. [cropingigh]
I actually believe the above post too. This was recorded in RAW, not USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables). How can i tell, because most raw signals have a stereo component that sounds similar to FMFrequency Modulation but is just used as RAW IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. reading of the signal, instead of FMFrequency Modulation stereo. --> Yalek W (talk).
Could be Ghadir (from Iran), but could be something Russian too. According to public sources the Ghadir and Sepehr radars belong to the same family as the Russian Rezonans-N and Rezonans-NE radars. All similar top HFHigh Frequency (3-30 MHz) / low band VHFVery High Frequency (30-300 MHz) systems.
It's hard to say where this kind of transmission comes from unless direction finding or TDoA location is done. Used transmission parameters could reveal it if we knew what parameters are used by Iranian, Russian etc. radars. But we don't really. This radar uses alternating rep rate like Ghadir is believed to do. But we don't know if Russian systems do as well.
By the way, I recommend taking AMAmplitude Modulation samples of pulsed radars, it produces most useful audio for determining pulse rep rates. FMFrequency Modulation sample can reveal if there is FMFrequency Modulation inside pulses, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) can be useful for this purpose too but USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) bandwidth should be as large as possible. But USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) audio can be ambiguous. USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) can rarely cover everything in radars since their bandwidths are so large. Raw IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. is fine for analysis. THis sample here sounds like USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables), not raw. Vhf explorer (talk) 21:56, 14 July 2025 (NZST)
