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The two Equinox threads will tell you what it uses, in the original V1.5 firmware, and thanks to El-Nino, the different frequencies in V1.7.5
The CTX uses the same frequencies as all the BBS/FBS/FBS2 machines:
A single cycle of 3.125 kHz, followed by 8 cycles of 25 kHz, then repeat. These freqs can be shifted a significant way above and below, about +/-7% I recall, using the 'noise-cancel' , the frequency ratio of 1:8 (3.125 : 25) is always maintained, regardless.
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