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About dbx
®
Noise Reduction
About dbx® Noise Reduction:
All the components in the Samson UHF Series System utilize dbx®
noise reduction so as to ensure the highest fidelity sound with an
absolute minimum of background noise and hiss. dbx® is a compand-
ing system; that is, the signal being transmitted has its dynamic range
compressed and its high frequencies boosted (this process is known as
pre-emphasis encoding), and the signal being received has its dynamic
range expanded and high frequencies attenuated in an exactly opposite
way (this process is known as de-emphasis decoding). The pre-
emphasis encoding process is automatically carried out by the UT-4 and
UH-4 transmitters and the de-emphasis decoding process is auto-
matically carried out by the UR-4 receiver. For this reason, you must
use these matched components in order for the noise reduction to work
as intended.
Note also that the headroom available from using the dbx noise
reduction system typically exceeds the peak limit of the UR-4 AF Level
meter by approximately 20 dB. Therefore, you should experiment (by
listening or other method) in order to find the proper signal level. In
many cases, the meter will be well beyond its peaked or pinned reading
without incurring any distortion of signal.
