WBS MLC8B User manual
MLC8B
MULTICHANNELLEVELCONTROL
byWardBeckSystems
Rev:Oct.012014
Unpacking:
Please inspect the unit carefully to ensure that damage had not occurred during
shipping.
Report any damage immediately to the factory, note if there is any obvious damage to
thepackaging.
The unit is supplied with a full complement of Phoenix ™3pin pluggable connectors
installed in their mating sockets. DB multipin type connectors and BNC connectors are
notsupplied.
Astandard3pindisconnectIECpowercableisincluded.
Installation:
TheMLC8Bmountsinastandard19inchrackandoccupiesonerackunitofspace.
Connections to the unit are made on the rear panel. Please note that the 25pin DB
female connector labelled AUX 1 is used to connect the analog inputs while the 25pin
DB male connector labelled AUX 2 is used to connect the analog outputs. The 9pin
DB female connector labelled SERIAL COMM is an RS422 control port for external
control of the device and is typically connected to and MLC8BR REMOTE control panel.
Please refer to the rear panel layout diagram and the detailed connector diagram for
connectorsAUX1,AUX2andSERIALCOMM.
The MLC8B is factory calibrated to operate at the nominal level of 20dBFS = 0. The
unit may be field calibrated for nominal levels of 18dBFS, 14dBFS or 12dBFS, please
refertothecalibrationtableinthismanual.
USINGTHEMLC8B
The MLC8B is designed to display the levels of multiple audio signals in a surround
sound environment (5.1 + 2) and to provide acoustic mixing of these signals with an
overall global level control. Every effort has been made to make using the MLC8B as
intuitiveaspossible.
All connections to the unit are made on the rear panel and all displays and operating
controlsarelocatedonthefrontpanel.
The MLC8B accepts AES, 110 Ohm, balanced audio signals, analog audio signals or
AES audio signals embedded in a 3G, HD or SD SDI video stream. The operator must
switch the input selector to the type of signal being controlled. To select the Group 3
and Group 4 signals from the SDI data stream for disembedding, the button labelled GR
3/4mustbeselected.
The push buttons labelled AES, ANALOG, SDI 1, SDI 2 and GR 3/4 in the cluster of
five LED illuminated push buttons on the righthand side allows the operator to select
the input signal source. The LED in the push button will illuminate to show the selection
that had been made. Please note that a mix of signal types can not be controlled
simultaneously.
When the sixth button in the cluster, labelled ST MODE, is pushed inputs one through
six (AES 1, 2 and 3) and (Analog 1, 2, and 3) are disconnected the seventh and eighth
channels (AES4) and (Analog4) are switched to the inputs 1 and 2 controls. This allows
the operator to listen to the ST L and ST R on the L and R monitor speakers. In the ST
MODEtheC,LFE,LSandRScontrolsaredisabled.
Eight bargraph displays on the lefthand side show the level of the incoming signal. The
factory setting for the bargraph meters is 20dBFS = 0. Field calibration of the meter for
othernominallevelsisachievedbyusingDIPswitches3and4ontherearpanel.
SW3 SW4 NOMINAL
Down Down 20dBFS
Down Up 18dBFS
Up Down 16dBFS
Up Up 12dBFS
The eight rotary level controls labelled L, R, C, LFE, LS, RS, ST L and ST R are used
to adjust the level of the individual signals being fed to the output of the MLC8B. These
rotary controls are equipped with concentric array of LED indicators that show the
proportionate value of the signal. Each rotary control incorporates a pushpush switch
that instantly mutes that signal. When muted the concentric LEDs extinguish except for
the highest level LED which flashes to indicate the mute condition. The MASTER level
control adjusts overall level of the proportional mix set by the eight individual level
controls. The MASTER level control also incorporates a pushpush switch. Activating
thisswitchmutesalleightchannels.
It is possible to store one preset proportionate mix in the MLC8B. Once the correct mix
is set up push and hold the AES and ANALOG selector buttons simultaneously until the
level indicator LEDs flicker (approximately five seconds) and the mix will be stored. To
recall the setup press and hold the ST MODE button (approximately five seconds) until
thelevelindicatingLEDsflicker.
MLC8BRRemotePanel
The MLC8BR Remote Panel permits secondary control of the MLC8B from a remote
location. Controls and displays on the MLC8BR mimic those on the main unit and
statuschangescanbeeffectedfromeitherlocation.
The MLC8BR mounts in a standard 19 inch rack and occupies one rack unit of space.
The unit is equipped with a single DB 9(M) connector for interfacing to the main MLC8B
unit.
MLC8BCONNECTORLAYOUTS
AESCONNECTORASSIGNMENT
MLC8BINTERCONNECTCABLE
MLC8BFUNCTIONALDIAGRAM
SPECIFICATIONS
ANALOGOUTPUT
FrequencyResponse
1.5dBufrom20Hzto20kHz
Impedance
60ΩBalanced
MaxOutput
23.5dBu
Noise
Lessthan70dBu
THD
Lessthan0.05%
ConnectorType
DB25male
AES/EBUINPUTS
Impedance
110Ωtransformerbalanced
Level
0.2to7Vpp
MaxInput
0dbfs
Standard
AES31D1995
Type
3PinTerminalBlock
AES/EBUOUTPUTS
Impedance
110Ωtransformerbalanced
Level
2.5Vppterminated
Output
0dbfs
Noise
Lessthan100dbfs
Standard
AES31D1995
THD
Lessthan0.001%
Type
3pinTerminalBlock
MONITOROUTPUT
FrequencyResponse
1.5dBufrom20Hzto20kHz
Impedance
60Ωbalanced
MaxOutput
23.5dBu
Noise
lessthan70dbfs
THD
Lessthan0.05%
ConnectorType
3pinTerminalBlock
POWER
Input
90230VAC,5060Hz
WardBeckSystemsLtd.reservestherighttochangeperformancespecificationswithoutpriornotice.
WARRANTY
All WardBeck Systems Ltd. products are warranted against defective materials and
workmanshipforaperiodofoneyearfromthedateofshipment.
WardBeck Systems Ltd. will repair or replace, at its option and without charge, all said products
or parts thereof which upon factory inspection prove to be defective during the warranty period,
providedthat:
1. Theoriginalserialnumbersareintactandhavenotbeentamperedwith.
2. The purchaser shall return any equipment or parts thereof to WardBeck Systems Ltd.
only after obtaining prior authorization and shipping instructions from the factory.
(WardBeck Systems Ltd. reserves the right to inspect or repair equipment on the
purchaser’spremises).
3. The purchaser assumes the obligation for all expenses in connection with the shipping
andreturnofsuchgoods,onceauthorizationhasbeenobtained.
Thiswarrantydoesnotcoveritemsnormallyconsideredexpendable,suchasfusesandlamps.
This warranty does not cover damages caused by misuse, accident, neglect, unauthorized
alteration, repair by unauthorized personnel, or damage caused by an act of God, war, or civil
insurrection.
In no event shall WardBeck Systems Ltd. be liable for consequential damages. WardBeck
SystemsLtd.shallhavetherightstofinaldeterminationastotheapplicationofthiswarranty.
WardBeck Systems Ltd. reserves the right, at any time and without notice, to make changes in
its equipment, components, specifications or designs, as may be warranted by progress in
stateofthearttechnology.
WardBeck Systems Ltd. reserves the right to make design changes, additions to, and
improvements in its products, without obligation to install such revisions in products previously
manufactured.
The warranty set forth herein is in lieu of all other warranties expressed or implied, including the
warrantiesofmerchantabilityandfitness.
WARDBECKSYSTEMSLTD.
945MiddlefieldRoad,Unit9,Toronto,OntarioM1V5E1
V4163355999F4163355202TollFree8007712556
Website:www.wardbeck.com
EMail:sales@wardbeck.com
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