Whirlwind MPM4 Spezifikationen PDF herunterladen (Seite 9)

TYPICAL SETUP PROCEDURE

Installation Tip

To facilitate the most expedient setup experience, it

may be desirable to do the initial setup with the MPM4

unit physically in each Zone. If a paging mic is to be

used in the zone, that wire can be used with adapters

to send the output of the MPM4 back to the power

amps in the system equipment location. Pulling a

shielded audio pair along with the CAT 5 wire for the

remotes would also make this possible. After the

initial setup and EQ with the paging mic in each Zone,

the MPM4 can be installed in the equipment location

and each input adjusted as required.

System Startup

Connect the power amplifiers to the speakers and to

the Zone Outputs of the MPM4. LEAVE THE

POWERS AMPS OFF. Connect a known reference

audio source to one of the Source Inputs. Apply

power to the MPM4, turn the Zone Volume Attenuator

Controls fully up and enter the Setup Mode. If the

Mode Select switch is not illuminated, press and hold

it for approximately four seconds to enter the

Password Unlock function. Enter the password and

press the Mode Select switch again. The switch

should illuminate and allow selection of the various

Setup Mode functions. Select the Input Trim mode

and turn all four level controls down to minimum.

Check the settings of the In and Zone EQ, adjust

them to flat if they are not. Enter the Zone Max Level

mode and adjust the Volume Controls to minimum.

Turn on the power amps and turn their input levels up

to a desired starting position. Turn on the reference

audio source, select Input Trim and set the input level

of the to a nominal level, about –6dB. Return to Zone

Max Level mode, select the Source Input and slowly

bring up the Volume Control for each Zone toward

unity gain as indicated by the Control Position

Indicator LED. Unity Gain is at the Flat or –6,

position. Adjust the amplifier input controls to

establish an initial appropriate volume for the

coverage area. Use the Zone EQ to optimize the

speakers to the listening area. Turn off the Source

Input audio.

Priority Setup

Priority Inputs replace the Source Inputs in any Zone

to which they are assigned. The maximum system

volume required by the listening environment should

be determined by the most important audio source to

be heard in each Zone. This could be from a

prerecorded announcement, a particular music

source or a paging microphone. If a paging

microphone is to be used, the system gain structure

should be adjusted to optimize the operation of the

paging function. For this installation a paging mic is

plugged into Priority Input 1. All paging microphones

used with the MPM4 should have an ON/OFF switch.

Select the Priority Assign mode and clear all Priority

Assignments (all Routing LEDs off) in the desired

Zone. Assign Priority In 1 to the Zone and set the level

control to minimum. Connect the paging mic to

Priority Input 1. Select the XLR with the XLR/RCA

switch and switch the Pad Off. Depress the Priority

Zone Level Override P1 switch to On. Select Priority

Trim Mode and turn on the mic. Adjust the Priority

Trim level, leaving enough headroom to avoid

clipping with maximum level peaks. Return to Priority

Assign mode and make sure that the In 1 Switch is

flashing. Slowly bring up the Volume Control in the

desired Zone until the microphone audio is at a

moderate level. Go to Priority EQ mode and make

sure that the In 1 Switch is flashing. The sound of the

microphone can be optimized with the 4-band

equalizer.

Fully optimizing a paging mic involves properly

structuring the gain stages of the MPM4. It is

desirable to have a paging mic that operates only

when spoken directly into and not be triggered by

ambient noise. The Priority Trim gain stage is before

the Priority Threshold Trigger. This allows

adjustment of the trigger level required to activate the

Priority Input. In the Priority Assign mode, the

Volume Controls set the level of the Priority Input

signal feeding into the Zone Max Level gain stage.

Balance the gain between these two stages to

achieve adequate headroom and sufficient system

drive level. If a hotter drive signal is desired from the

MPM4, select Zone Max Level and boost the signal

above unity. This process establishes Zone Max

Level and all other inputs can now be set up in relation

to it.

Source Inputs can be added and balanced at a lower

volume. Turn off the Priority Zone Level Override P1

switch on the rear panel. Return to Normal Mode and

reduce the Zone Volume Controls. Assign Source

Inputs to the desired Zones. Select Input Trim and

the turn up the controls from minimum to set the

balance of the Source Inputs using the paging mic

level as a reference. Other Priority Inputs can be

added by balancing the Priority Trim levels with the

Priority Assign Volumes to achieve the proper system

volume hierarchy. Only the Priority Input being

optimized should be routed to that Zone during setup.

Use the Input EQ and Priority Input EQ to enhance

the sound of each source. With line level signals, the

idle noise level (like a jukebox with no music playing)

must be well below the fixed detector threshold of -

30dB to prevent false triggering.

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