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Any RF that falls within a receiver's passband that's hot enough can open squelch and pass noise.
Each station detects and accurately times the arrival of impulsive VHF (very high frequency) events in a 6MHz passband centered at 63MHz.
The passband filters used were of 546, 490 and 360 nm for green, blue and ultraviolet light, respectively.
Seven band-pass filters (ca 50 nm passband each) were used to cover the spectral region from 280 to 630 nm.
Adaptive passband equalization filtering comprises in addition to a non-iterative portion, an iterative filtering portion to suppress longer-delayed post-ghosts.
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