Wohler AMP1-VSD User Manual Download Page 1

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Title and Contents

.............................................................

Introduction ...............................................................................

Section 1: Features, Specs, and Installation

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Description and Features .............................................................

Applications and Specifications ...................................................

Installation .................................................................................

Section 2: Operation

........................................................

Front Panel Features ...................................................................

Rear Panel Features ....................................................................

Audio Amplifier and Speaker Configuration ................................

Section 3: Technical Information

................................

General Technical Observations ..................................................

AES to Analog Converter Module (919050 PCB) .........................

AES D/A Gain Calibration Fine Adjustment (919050 PCB) .......

AES Error Indication Jumper Locations (919050 PCB) .................

SDI to AES Converter Module (919096 PCB) ..............................

Level Meter Rear Panel 6-Position DIP Switch Settings ................

Level Meter Internal 10-Position DIP Switch Settings ..................

Level Meter DIP Switch Locations (919174 PCB) .........................

Level Meter Alternative Scales ....................................................

AMP1-VSD Interconnect Block Diagram .....................................

AMP1-VSD

1U Digital Audio Speaker Monitors

with One SDI Input and One SDI Output on BNC,

Two AES Inputs on BNC, Two AES Outputs From SDI

Input on BNC, Two Analog Outputs of the Left/Right Channel

Selections on XLR, Four Analog Outputs From Selected

Digital Source, Summable Channel Assignment,

Four 26-Segment Level Meters, and Phase Indication

Document P/N

821615

Rev-

CONTENTS

User Manual

ECO-2784 (11/17/04)

Summary of Contents for AMP1-VSD

Page 1: ...r Panel 6 Position DIP Switch Settings Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations 919174 PCB Level Meter Alternative Scales AMP1 VSD Interconnect Block Diagram AMP1 VSD 1U Digital Audio Speaker Monitors with One SDI Input and One SDI Output on BNC Two AES Inputs on BNC Two AES Outputs From SDI Input on BNC Two Analog Outputs of the Left Right Channel Sele...

Page 2: ...eing walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip ...

Page 3: ...nologies Inc ALL rights reserved 3 AMP1 VSD User Manual P N 821615 Rev A Sect 1 General Features and Specifications Features Specs and Installation Description Features Applications Specifications Installation Section 1 ...

Page 4: ...ophile quality drivers and three power amplifiers two amplifiers and two speakers that reproduce midrange and high frequency information in stereo and a third amp driver combination and two speakers that handles summed Low Frequency LF information below the 500 Hz crossover point The AMP1 Series unique audio design has two important advantages First it provides optimally focused sound in an Ultra ...

Page 5: ...e Reference Level Display Mode Select Peak Hold Select PPM Ballistics Select Calibration Scale Select 26 segment tri color LED bargraph 4 each vertical Tricolor red amber green 62 dB 0 4 6 or 8 dBv selectable VU Only VU PPM or PPM Only Manual 3 sec 10 sec or OFF Type I Type II DIN 4506 or SSRT Auto VU Extended VU BBC NORDIC DIN or Custom General Specifications AES InputConnectors SDI InputConnecto...

Page 6: ...ed to stop vibrations external to the unit Mechanical Bracing Even though the unit is fairly heavy the chassis is securely attached to the front panel at eight points along its surface not just at the four corners of the chassis ears This feature will reduce or eliminate rear bracing requirements in many mobile portable applications The weight of internal components is distributed fairly evenly ar...

Page 7: ...r Technologies Inc ALL rights reserved 7 AMP1 VSD User Manual P N 821615 Rev A Operation Front Panel Features Rear Panel Features Audio Amplifier and Speaker Configuration Balance Control Characteristics Section 2 ...

Page 8: ...accept the selection set When multiple channels are selected pressing and holding an already selected channel button will allow further modification to the selection set Releasing all buttons accepts the new selection set Pressing and immediately releasing an already selected channel button will select only it and deselect all other channel selections Note that if channels assigned to either the l...

Page 10: ...e the relative brightness of all bargraph display LED segments Adjusting this one control will simultaneously affect the brightness of all bargraph displays on the front panel SDI Signal Status Indication LED This bi color GREEN RED LED indicates the SDI signal status Indication is as follows GREEN valid SDI datastream received RED invalid SDI datastream or TSR errors in datastream Unlit no datast...

Page 12: ...d is configured for an unbalanced 75 Ω connection Level Meter DIP Switch Module 6 Position This DIP switch sets the Line Level Calibration Reference Level and PPM VU Display Mode for the level meter LED bargraph displays on the front panel See page 23 for for setting information Selected Analog Output Connectors Right A and Left B These two 3 pin male XLR connectors are analog outputs of the selec...

Page 14: ... Gain Calibration the analog level which corresponds to a given digital input value is settable via this DIP switch The factory setting is 4 dB analog 20 dBFS digital See the silk screened chart on the rear panel or the diagram below for settings Analog Output From Selected Digital Source Connectotrs These four connectors output analog signals converted from the selected digital input SDI or AES a...

Page 16: ... balance control attenuates the signal from the source so that the left and right bass frequencies summed together and reproduced in the woofer channel will also respond to the balance control Example If an audio signal of a voice speaking English is fed to the left A input and a voice speaking Spanish is fed to the right B input then the left speaker channel will reproduce the midrange and high r...

Page 17: ...19050 PCB AES D A Gain Calibration Fine Adjustment 919050 PCB AES Error Indication Jumper Locations 919050 PCB SDI to AES Converter Module 919096 PCB Level Meter Rear Panel 6 Position DIP Switch Settings Level Meter Internal 10 Position DIP Switch Settings Level Meter DIP Switch Locations 919174 PCB Level Meter Alternative Scales AMP1 VSD Interconnect Block Diagram Section 3 ...

Page 18: ...ge and before the volume control section The signal pick off for the headphones is after the volume and balance controls Speaker muting is controlled by circuitry that senses connection of headphones to the jack The power amps are attached to an aluminum heatsink plate which is also connected to the circuit common for these devices The heatsink plate forms an operational module separate from the c...

Page 19: ...ors and or balanced 110 Ω XLR connectors This module also features a four channel balanced Analog line level output which can be configured with unbalanced 75 Ω BNC connectors balanced 110 Ω Phoenix connectors or balanced 110 Ω XLR connectors 919050 Specifications Inputformats Digital to AnalogConversion Samplingrate Termination Analogout ofdigitalsource S N THD fulloutput Maxoutputofanalogout D t...

Page 20: ...ors Item J page 14 Be sure to take a measurement of the FULL balanced output NOT just between one of the outputs and ground 5 Locate trim pots P1 P2 P3 and P4 see Figure 3a below Adjust P4 channel 1 through P1 channel 4 for the desired analog level corresponding to the digital signal amplitude being supplied to the unit For example if your house Analog Digital correspondence is for a 18 dBfs digit...

Page 21: ...r Manual P N 821615 Rev A AES Error Indication Jumper Locations 919050 PCB To disable indication of faulty AES data and leave only indi cation of faulty reception place jumpers on both H14 and H18 See Item 11 page 10 for more information Section3 TechnicalInformation ...

Page 22: ...P Digital Series units channels 1 and 2 first subgroup and channels 3 and 4 second subgroup from SDI Group ID 1 are demuxed before being input to the AES to analog conversion module 919050 Access to SDI Group ID 2 3 and 4 is optional and should be specified at time of order SDI to AES Converter Module PCB 919096 919096 Specifications Inputcharacteristics Receivertype Sensitivityperformance SDIinpu...

Page 23: ...bargraphs Factory setting is 4 dB See DIP switch diagram below for settings Bargraph Display Mode DIP switch sections 4 and 5 determine how peak levels are displayed for the associated meters on the front panel There are four possible settings VU Only VU PPM Floating Segment PPM Only and PPM PPM Floating Segment The VU Only selection has a VU floating segment when a Peak Hold value is selected usi...

Page 24: ...e Time is 10 ms 2 dB Return Fall Time is 2 8 seconds 24 dB Integration Rise Time is 5 ms 2 dB Return Fall Time is 1 5 seconds 20 dB Integration Rise Time is a single sample Return Fall Time is 1 5 seconds 20 dB IEC268 10 Type 1 IEC268 10 Type 2 DIN 4506 SingleSample Section3 TechnicalInformation This 10 position DIP switch is accessed by removing the top cover of the AMP unit and is located on the...

Page 25: ...25 AMP1 VSD User Manual P N 821615 Rev A Internal Level Meter 10 Position DIP Switch Module see page 24 Rear Panel Level Meter 6 Position DIP Switch Module see page 23 Level Meter DIP Switch Locations 919174 PCB 919174 PCB Section3 TechnicalInformation ...

Page 26: ... are selected for the level meters using the Level MeterInternal 10 Position DIPSwitch page 24 it is recommended that a label with the appropriate scale be applied to the front panel LED bargraph level meters See the diagram below for scale comparison Scale selection includes the Extended VU standard VU BBC NORDIC DIN and Custom not shown scales Contact WohlerTechnologies for information about alt...

Page 28: ...echnologies Inc 713 Grandview Drive South San Francisco CA 94080 650 589 5676 Fax 650 589 1355 web www wohler com e mail support wohler com Wohler Technologies Inc 31055 Huntwood Avenue Hayward CA 94544 Phone 510 870 0810 Fax 510 870 0811 US Toll Free 1 888 596 4537 www wohler com support wohler com ...

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