Zeck d.a.i.sy DS 800 UHF Manuel D'utilisation page 27

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2.8 Audio level LEDs (12-14)
Three LEDs with different colours indicate the incoming audio
level from the transmitter. The audio level has to be adjusted
with the input sensitivity adjustment screw (1) on the trans-
mitter (see chapter 4 for setting instructions). The receiver's
output level control (19) has no influence on the incoming au-
dio signal level and the LEDs.The audio signal level should be
as high as possible without overloading the system. The yellow
LED (12) indicates that the audio signal level is too low, the green LED (13) indi-
cates a correct audio signal level and the red LED (14) indicates signal overload
which will result in distortion.
2.9 Noise reduction
The receiver has an adjustable noise reduction which suppresses
unwanted noise by muting the audio signal whenever receiving
problems occur. Possible causes for receiving problems can be
a too weak r.f. carrier signal from the transmitter or r.f. stray
signal interference from other digital or wireless devices. The
noise reduction system of the DS800 UHF compares the
strength of the received r.f. carrier signal with an internal
threshold value that can be altered with the noise suppression adjustment
screw (10). Whenever the incoming r.f. carrier signal falls below the set
threshold value, the audio output signal of the receiver becomes automatically
muted. Rotating the adjustment control (10) fully counterclockwise sets the
internal threshold extremely low so that even a weak r.f. carrier signal activates
the audio signal.
Important: This setting yields the largest operating radius for the system.
For this reason, this setting must be initially used whenever the system is set up
in a new location. Only if noise bursts occur due to difficult reception conditions,
the adjustment screw (10) should be rotated clockwise. Sound drop-outs over
long distances can be counteracted by rotating the noise control counter-
clockwise. If in doubt about the appropriate setting of the noise control, use
settings that are more counterclockwise.
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