Wohler AMP2-V2DA User Manual

2u digital/analog audio speaker monitor

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2U Digital/Analog Audio Speaker Monitor

with Two AES Inputs on BNC and XLR, Four Analog

Inputs on Phoenix, Four Analog Outputs From AES

on Phoenix, Selected Analog Stereo Outpts on XLR,

Four 53-Segment Level Meters, and Phase Indication

Title and Contents ......................................................

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

Section 1: General Features and Specs ..................

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

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

Section 2: Operation

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

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

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

Section 3: Technical Information ............................

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

AES/EBU to Analog Converter PCB (919050) Description ............

Level Meter Settings and Specifications ...........................................

Level Meter Bargraph "0" (Zero) Fine Adjustment ..........................

Level Generator (919126) and LED Driver (919110) PCB

Descriptions .....................................................................................

AMP2-V2DA Interconnect Block Diagram ......................................

AMP2-V2DA

Document P/N 821539 Rev. A

User Manual

CONTENTS

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

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Summary of Contents for Wohler AMP2-V2DA

Page 1: Table Of Contents
General Technical Observations ............AES/EBU to Analog Converter PCB (919050) Description .... Level Meter Settings and Specifications ........... Level Meter Bargraph "0" (Zero) Fine Adjustment ......Level Generator (919126) and LED Driver (919110) PCB Descriptions ..................AMP2-V2DA Interconnect Block Diagram ........
Page 2: Introduction
Introduction Congratulations on your selection of a Wohler Technologies product. We are confident it represents the best performance and value available, and we guarantee your satisfaction with it. If you have questions or comments you may contact us at: Wohler Technologies, Inc.
Page 3: Section 1: General Features And Specs
AMP2-V2DA User Manual P/N 821539 Rev-A Section 1 General Features and Specifications Description Features Applications Specifications © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 4 The AMP2-V2DA is an analog and digital (AES/EBU) audio monitor capable of audibly monitoring two of four selected source channels through it's stereo speaker system while simultaneously visually monitoring all four channels of the selected source via four LED bargraph level meters.
Page 5 The AMP2-V2DA is ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite links and cable TV facilities, and on-air radio studios. Designed and manufactured in the U.S., the AMP2-V2DA is backed by a strong warranty and a satisfaction guaranteed return policy.
Page 9 Connection of the audio feeds is straightforward. Please refer to the system interconnect block diagram on page 24 for clarifica- tion of the general signal paths into and out of the AMP2-V2DA unit. AES/EBU inputs are via either female BNC or 3-pin female XLR connectors. Digital BNC inputs are 75 Ω unbalanced; digital XLR inputs are 110 Ω...
Page 10 (center) is not a dedicated Center nor LFE speaker. Power Indication LED This LED glows green to indicate the AMP2-V2DA is connected to mains power and an operation voltage is present. Audio Level Meter LED Bargraph Displays (1-4) Audio levels for the selected 4-channel source is visually displayed via these four high-resolution, 53-segment, tri-color LED bargraph meters.
Page 12 Note: If you wish to disable data error indication (and leave only indication of reception errors) you can place jumpers on H14 and H18 of the 919050 AES-to-Analog conversion PCB (see page 26 for component locations). © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 14 The factory setting is +4 dB (analog) = -20 dBFS (digital). See the silk-screened chart on the rear panel or the diagram below for Gain Calibration settings. AES D/A Conversion Gain Calibration Settings 0 dB = -18 dBFS +4 dB = -20 dBFS +6 dB = -9 dBFS +8 dB = -20 dBFS (Continued) © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 16 For XLR pinout information see the diagram below. Pin-2 Pin-1 Pin-1 Pin-2 High (+) High (+) (Shield) (Shield) Pin-3 Pin-3 Low (-) Low (-) Female XLR Pinout Male XLR Pinout © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 19: Section 3: Technical Information
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3 Technical Information • General Technical Observations • AES to Analog Converter Module PCB (919050) • Level Meter Settings and Specifications • Level Meter Bargraph "0" (Zero) Fine Adjustment • Level Generator (919126) and LED Driver (919110) PCB Descriptions •...
Page 20: General Technical Observations
(common) OR THE GROUNDED LEAD OF ANY TEST EQUIPMENT so as not to short out the power amps. The side speaker outputs are single-ended, so these precautions are not necessary for them. © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 21 AES/EBU to Analog Converter Module PCB (919050) Description The Digi-2 (dual input AES/EBU to analog converter module PCB) allows selected Wohler Technologies products to receive input signals in the AES/EBU or SPDIF digital audio data formats. Sampling rate and format selection are sensed and set automatically.
Page 22: Level Meter Settings And Specifications
Green: 570 nm, Red: 630 nm Peak emmision wavelength: Bargraph Scale 3.5 mcd Segment brighness, (If = 20 mA): Segment brightness, uniformity: <10% difference between segments <1% of brightness of active segment Adjacent segment "Off" brightness: © 2001 Wohler Technologies Inc. ALL rights reserved...
Page 23: Level Meter Bargraph "0" (Zero) Fine Adjustment
AMP2-V2DA User Manual P/N 821539 Rev-A Section 3: Technical Information Level Meter Bargraph "0" (zero) Fine Adjustment Note: For range setting, use the Meter Input Gain Calibration/Bargraph Display Mode DIP Switches 1) Removal of the Top Cover Remove the top cover screws (2 along upper front panel, 2 per each side, 3 along upper rear panel). The 919126 PCB is vertically mounted to chassis bottom just behind the front panel mounted LED driver PCB (see photo below).
Page 25 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...
Page 26 713 Grandview Drive 31055 Huntwood Avenue South San Francisco, CA 94080 Hayward, CA 94544 650 589-5676 Fax: 650 589-1355 Phone: (510) 870-0810 Fax: (510) 870-0811 web: www.wohler.com US Toll-Free: 1-888-596-4537 e-mail: support@wohler.com www.wohler.com support@wohler.com © 2001 Wohler Technologies Inc. ALL rights reserved...

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