I found the reason “It can be decoded at -5 kHz lower tuning below the carrier”
that UZ7HO said. Looking of the reception figure above which received me on
2 Jan 2019, it will be decoded at that moment when the signal began to hear
in Soundmodem. You can see 9k6 spectrum in the FFT of SDR# at the beginning
of the signal. It’s the red arrow part in the figure above.
The red vertical line at the center of the 16 kHz width filter is -5 kHz lower
tuning below the carrier. In other words, it was decoding 9k6 in Soundmodem
when I put the red vertical line at 436.9958 MHz in SDR# FFT in the case of
the figure above. It meant that it was “-5 kHz lower tuning”.
Happy New Year
Andy, UZ7HO said you should tune your radio -4800hz below the carrier,
and I, JE9PEL confirmed this IQ.wav file had the highest decoding
possibility at 436.987 MHz below -7 kHz carrier. (1st Jan 2019)
#43768 4k8/9k6* GMSK 436.730MHz (1KUNS decoder)
I, JE9PEL heard Kazakhstan’s satellite “Al-Farabi-2”.
The transmission interval is every 3 minutes.
Al-Farabi Kazakh National University, Kazakhstan
Launch: 28 Nov 2018, 12:32 UTC
Downlink: 436.500MHz 4k8 GMSK, CW
NORAD ID: #43805
IQ.wav, 02:01-02:12 UTC, 15 Dec 2018