Cloud Z8II Manuel d'installation et d'utilisation - Page 5

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Music Inputs - Sensitivity & Gain Control

All six line inputs have a pre-set gain control on the rear panel, adjacent to the respective

input sockets. The input sensitivity can be varied from –12dBu (195mV) to +8dBu (2.0V).

The pre-set gain controls should be set so that all the input signals operate at the same level

within the mixer so that the change in level when switching sources is minimal. The input

gain controls can also be used to limit the amount of gain available from the user controls.

Music Control – Front Panel or Remote Plate

The music source and music level control functions of a zone can be operated from the front

panel or remotely via the optional RSL-6 remote source & level plate. When a remote control

plate is connected to a zone, the rear panel mounted music control switch must be in the

'Remote' position. The RSL-6 can be positioned up to 100 metres from the mixer and two

core cable with overall screen should be used. Self-adhesive labels are provided to identify

the signal source on both the mixer front panel and the RSL-6. If it is preferred to provide

remote control of the music level without remote source selection, the RL-1 remote level

control can be wired to any zone using a two-wire connection (see section 21 for more

installation details). The LM-1 active module also includes the remote music source and

music level function (see section 24.4 for full details).

Music Equalisation

Separate treble and bass controls are provided exclusively for the music signals on each

zone. This arrangement allows the installer to optimise the response of the music signals on

a zone by zone basis where different acoustic properties require optimal equalisation

adjustment. The pre-set controls are located on the rear panel adjacent to the respective

zone output connector. A flat response can be achieved by positioning the adjustment slot in

the horizontal plane. The music treble control (HF) has a range of ±10dB at 10kHz and the

music bass control operates with a range of ±10dB at 50Hz.

Line 6 input priority

Both the Z4 and Z8 mixers have a facility to allow fully automatic priority to a JukeBox or

Spot Announce Player. The Z4 mixer provides this facility on all four zones and the Z8 on all

eight zones. Line 6 priority is activated by setting jumper J2 on the relevant zone board to

the 'ON' position. When the priority is on, the mixer will operate normally until a signal is

detected on line input 6, this causes the selected signal (usually background music) to mute,

allowing the signal on line 6 to operate with priority. Once the signal on line 6 ceases, the

selected music signal will smoothly restore to its former level. The time taken for this

restoration can be 3, 6 or 12 seconds dependant on how internal jumper J3 has been set (for

12s restoration remove the jumper altogether). The factory default is 3s.

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.

Microphone Inputs

Two microphone inputs are provided and the microphone amplifier is an electronically

balanced, transformerless design configured for optimum low noise performance. The input

impedance is greater than 2kΩ and is suitable for microphones in the 200Ω to 600Ω range.

Inputs are via gold plated female 3 pin XLR type connectors with latch and these are

positioned on the rear panel. A facility to provide +15v phantom power is included and this

can be activated by setting a jumper (adjacent to the Mic input connector on the mother

board) to the 'ON' position. J1 applies to Mic 1, J2 applies to Mic 2 and the jumper J3 relates

to the paging microphone input.

The location of J1 is shown on the next page.

30/05/03 V8

& Z8

: Installation and User Guide