Cloud Electronics CX163 - Manual (Page 12)

Note: We advise that when you remove a jumper you leave it connected to one pin of the
header so it remains with the apparatus for future use.
Upon leaving the factory, the unit is configured to bypass the microphone access contacts. In
order to activate the access contact for a particular zone, the appropriate link will need to be
removed.
When setting the jumper(s) please ensure that you:
• Remove the mains cable from the rear of the product before removing the top
panel.
• Only reassemble the unit using screws identical to the original parts.
6.2 Microphone Gain Control
A pre-set gain control is provided adjacent to the microphone input. The gain can be adjusted
from 10dB to 50dB. A high overload margin is maintained at all gain settings.
6.3 Microphone Level Controls
Front panel microphone level controls are provided for each stereo zone. Microphone level to
the utility zone of the CX163 is varied by using the pre-set level control located above the utility
zone output on the rear panel. Rotating any microphone level control fully anti-clockwise
effectively turns the microphone off in that zone. In addition the microphone can be muted on
a zone basis via the paging access contacts.
6.4 Microphone Equalisation
Two-band equalisation is provided for the microphone input. The pre-set controls to adjust the
equalisation are located directly above the microphone input socket. The characteristics of the
equalisation are optimised for the tonal correction of speech signals. The HF control provides
±10dB at 5kHz whilst the LF control provides ±10dB at 100Hz.
To effectively bypass the microphone equalisation section, both pre-set controls should be set
to 0dBu (mid-position/vertical).
6.5 High Pass Filter
The microphone signal passes through a 100Hz high pass filter. This is to reduce breath blasts
and handling noise on the microphone audio.
CX163 Stereo Zone Mixer Installation and Setup Guide
CLOUD ELECTRONICS LIMITED
6 V2 100904
Paging Access Contacts continued