Cloud Electronics 44/50 - Manual (Page 6)

44/50: Installation and Operation Manual 5
We suggest that the CPM-4 should be wired using 2-core screened cable directly to the
MIC 1 XLR input and 6-core cable with overall screen to the 44/50 paging microphone
connector (as shown below).
As an alternative the CPM-4 can connect to
the MIC 1 input stage via the 9 pin ‘D’
connector, using an 8-core screened cable.
With the mic signals wired to Pin 5 and 9 see
the right hand diagram.
NOTE: This method is not recommended.
12 Connecting Multiple CPM-4s to the 44/50
When using more than one CPM-4 in a system, only audio and selection logic signals are
connected in parallel. The wiring can be arranged in a wide range of configurations. For
example the microphone cables can all be terminated at the mixer, ‘daisy chained’, or
‘star’ connected to a junction box. Any combination of these will work provided that the
microphone zone access and audio terminals are connected in parallel. The total cable
length in the system should not exceed 100m.
NOTE: The 44/50 can only power one CPM-4 any additional CPM-4 mics will require their
own external power supply (CPM-PSU)
13 Microphone Gain Control
Pre-set gain controls are provided adjacent to the respective XLR input connector. The
gain can be adjusted from 0dB to 60dB; this wide range of gain allows direct connection
of high output devices such as radio microphones without the need for any additional
attenuation. A high overload margin is maintained at all gain settings.
14 Microphone Equalisation
Two band equalisation is provided for both Mic 1 and Mic 2 and these pre-set controls are
positioned alongside the input connector and gain control on the rear panel. The
characteristics of the equalisation is optimised for the tonal correction of speech signals
and the treble control (HF) provides
±
10dB at 5kHz with the bass control (LF)
±
10dB at
100Hz.