Zeck d.a.i.sy DS 800 UHF Manuel D'utilisation page 31

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4. Input sensitivity adjustment
Correct adjustment of the transmitter input sensitivity to the
connected microphone or instrument is the crucial point for a
noise-free and reliable operation of the DS800UHF. This
adjustment has to be made before the receiver is connected
to a mixer or amplifier. The input sensitivity adjustment screw
(1) is located on the transmitter and requires a small flat-bladed
screwdriver (included with the set).
Always follow this procedure for best results:
1. Connect microphone or instrument to the transmitter
2. Switch on transmitter and receiver. The 'RF' LED (11) on the receiver must
remain bright. If not, refer to the troubleshooting chapter below.
3. Create an average-level signal with the microphone or instrument. The green
audio level LED (13) should light up.
4. At peak signal levels, the red audio level LED (14) should just not light up.
After the transmitter has been adjusted, the receiver can be connected to the
mixer or amplifier. The output level control (19) of the receiver can be used to
set the system for unity-gain, which means that the connected mixer or amplifier
'sees' the same level as if a cable were used.
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