CHINA [and non] Checked VOA Mandarin service broadcast at 1100-1205 UT
today March 5th.
Only a singly frequency carried FIREDRAKE music jamming:
15670 UDO Thailand / + BUZZER noise scratchy audio + CNR program spoken,
- triple jamming.
Other frequencies only covered both
new BUZZER noise scratchy audio + CNR program spoken type:
6045UDO
9530TIN
9825SAI / TIN
11635UDO
11720TJK
12045TIN
13650TIN
15110TIN
(wb, wwdxc BC-DX TopNews March 5)
The Buzzer is a new type of jamming introduced by the Chinese a few months
ago and now becoming more widespread. The signal is DSB with no carrier
and the audio is of the squarewave type with maximum audio strength about
+/- 2.5 kHz from the suppressed carrier. Just as the buzzer starts it has
a second or two of only carrier.
I have no idea whether the buzzers are refitted voice/music jammers or are
a new generation specifically made for the purpose. Anyhow, they are
probably the result of the new harder line government that recently took
office. Apparently the Chinese transmitters are tunable only in 5 kHz
steps and the VOT people make use of this by using offset channels.
(Olle Alm-SWE, 4 March; via wwdxc BC-DX TopNews)
Extended heavy FIREDRAKE music jamming noted today March 4 !
FIREDRAKE music jamming has something to do with 12th National People's
Congress during the 1st Plenary Session at Peking in March 2013.
(wb, wwdxc BC-DX TopNews March 4)
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