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AMP2-VS and AMP2-VSA
2U Digital Audio Speaker Monitor
With One SDI Input and Output on BNC,
Four Analog Out From SDI on Phoenix, Four
Analog Inputs on XLR (-VSA Only), Two Selected Analog
Stereo Outs on XLR, Four 53-Segment Level Meters,
Summable Channel Assignment, and Phase Indication
Title and Contents .......................................................................
Introduction .........................................................................................
Section 1: Features, Specs, and Installation ....................
Description and Features ......................................................................
Applications and Specifications ............................................................
Installation ...........................................................................................
Section 2: Operation .................................................................
Front Panel Features ............................................................................
Rear Panel Features ..............................................................................
Audio Amplifier and Speaker Configuration .........................................
Balance Control Characteristics .............................................................
Section 3: Technical Information .........................................
General Technical Observations ............................................................
SDI to Analog Converter Module (919068 PCB) ....................................
SDI D/A Gain Calibration Fine Adjustment (919068 PCB) .....................
Level Meter Rear Panel 6-Position DIP Switch Settings .........................
Level Meter Internal 10-Position DIP Switch Settings ............................
Level Meter DIP Switch Locations ........................................................
Level Meter Alternative Scales ..............................................................
Level Meter Phase Correlation Featrure .................................................
AMP2-VS Interconnect Block Diagram .................................................
AMP2-VSA Interconnect Block Diagram ...............................................
© 2004 Wohler Technologies Inc. ALL rights reserved
Document P/N 821583 Rev-A
User Manual
CONTENTS
ECO-2507 (08/11/04)
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Table of Contents
Related Manuals for Wohler AMP2-VS
Summary of Contents for Wohler AMP2-VS
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Page 1: Table Of Contents
Level Meter Internal 10-Position DIP Switch Settings ......Level Meter DIP Switch Locations ............Level Meter Alternative Scales .............. Level Meter Phase Correlation Featrure ..........AMP2-VS Interconnect Block Diagram ..........AMP2-VSA Interconnect Block Diagram ..........ECO-2507 (08/11/04) © 2004 Wohler Technologies Inc. ALL rights reserved... -
Page 2: Introduction
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Introduction Congratulations on your selection of a Wohler Technologies AMP2-VS or AMP2-VSA audio monitor unit. We are confident it represents the best performance and value available, and we guarantee your satisfaction with it. -
Page 3: Section 1: Features, Specs, And Installation
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 1 Features, Specs, and Installation Description Features Applications Specifications Installation © 2004 Wohler Technologies Inc. ALL rights reserved... -
Page 4: Description And Features
AMP2-VSA Front Panel Description The AMP2-VS and AMP2-VSA are monitors capable of audibly monitoring up to four source channels de-embedded from an industry standard SDI bitstream through a stereo speaker system while simultaneously visually monitoring all four channels of the selected source via four high-resolution 53-segment LED bargraph level meters. -
Page 5: Applications And Specifications
Section 1: Features, Specs, and Installation Applications The AMP2-VS and AMP2-VSA are 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., both models are backed by a strong warranty and a satisfaction guaranteed return policy. -
Page 6: Installation
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 1: Features, Specs, and Installation Installation Mounting The unit should be mounted where convenient for operating persons, ideally at approximately ear/eye level for best high frequency response and visual observation of the level meters. Its superior magnetic shielding eliminates concerns about locating it adjacent to most types of CRT monitors, including even high-resolution color monitors. -
Page 7: Section 2: Operation
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2 Operation Front Panel Features Rear Panel Features Audio Amplifier and Speaker Configuration Balance Control Characteristics © 2004 Wohler Technologies Inc. ALL rights reserved... -
Page 8: Front Panel Features
Section 2: Operation Front Panel Features Please refer to Figure-2a on the facing page to familiarize yourself with the front panel features of the AMP2-VS and AMP2-VSA units. The following sections describe these features and are referenced, by number, to Figure-2a. - Page 9 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2: Operation AMP2-VSA AMP2-VS Figure-2a: Front Panel Features © 2004 Wohler Technologies Inc. ALL rights reserved...
- Page 10 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2: Operation Front Panel Features (Continued) Phase Indication LEDs These three LEDs indicate the instantaneous and average phase (polarity) conditions between the channels assigned to the left and right speaker channels. The two smaller LEDs labeled FAST show instantaneous phase relationships in the signal.
- Page 11 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2: Operation AMP2-VSA AMP2-VS Figure-2a: Front Panel Features © 2004 Wohler Technologies Inc. ALL rights reserved...
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Page 12: Rear Panel Features
Section 2: Operation Rear Panel Features Please refer to Figure-2b on the facing page to familiarize yourself with the rear panel features of the AMP2-VS and AMP2-VSA unit. The following sections describe these features and are referenced, by letter, to Figure-2b. - Page 13 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2: Operation AMP2-VSA AMP2-VS Figure-2b: Rear Panel Features © 2004 Wohler Technologies Inc. ALL rights reserved...
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Page 14: Audio Amplifier And Speaker Configuration
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 2: Operation Audio Amplifier and Speaker Configuration General Description All models in the AMP Series contain high performance transducers (speakers) driven by three power amplifiers; two amplifier/ driver combinations handle midrange and high frequency information in the left and right (stereo) speaker channels, while the third amplifier channel sums the left and right channel information below the 500 Hz crossover point in the woofer (bass) speaker(s). -
Page 15: Section 3: Technical Information
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3 Technical Information General Technical Observations SDI to Analog Converter Module PCB (919068 PCB) SDI D/A Gain Calibration Fine Adjustment (919068 PCB) Level Meter Rear Panel 6-Position DIP Switch Settings Level Meter Internal 10-Position DIP Switch Settings... -
Page 16: General Technical Observations
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information General Technical Observations General Mechanical Observations Elimination of cabinet and component sympathetic vibrations (resonances) requires considerable attention to mechanical details. Because of this, and the physical constraints of the speaker’s acoustic enclosures, even minor changes to any of the mechanical details of the unit can seriously impair its acoustic performance. -
Page 17: Sdi To Analog Converter Module (919068 Pcb)
The 919068 demultiplexes (extracts) the audio data from the video data, and converts it to analog. In the AMP2-VS and AMP2-VSA models, SDI channels one and two (first subgroup) and channels three and four (second subgroup) from Group I.D. #1 are demuxed for conversion to analog. Access to SDI Group I.D. #2, #3, or #4 is optional and may be specified at the time of order. -
Page 18: Sdi D/A Gain Calibration Fine Adjustment (919068 Pcb)
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information SDI D/A Gain Calibration Fine Adjustment (919068 PCB) The digital gain calibration is set at the factory for +4 dB (analog) = -20 dBFS (digital). Three other values (+8 = -20, +6 = -9, and 0 = -18) may also be user selected via a DIP switch on the rear panel (Item C, page 12). -
Page 19: Level Meter Rear Panel 6-Position Dip Switch Settings
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information Level Meter Rear Panel 6-Position DIP Switch Settings Line Level (Auto) Calibration, Reference Level, and Display Mode This DIP switch sets the Line Level Calibration, Reference Level, and PPM/VU Display Mode. See the descriptions and diagram below for setting information. -
Page 20: Level Meter Internal 10-Position Dip Switch Settings
(a special option specified at time of order) or by removing power and then reapplying power to the unit (unplug/replug power cord). Contact Wohler Technologies for more information about this feature. Contact Wohler Technologies for information about custom scales. -
Page 21: Level Meter Dip Switch Locations
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information Level Meter DIP Switch Locations Level Meter Rear Panel 6-Position DIP Switch Module (see page 19) 919174 PCB Level Meter Internal 10-Position DIP Switch Module (see page 20) -
Page 22: Level Meter Alternative Scales
Switch (page 20), 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 Analog), VU, BBC, NORDIC, DIN, and Custom (not shown) scales. Contact Wohler Technologies for information about alternative scale labels. Extended VU... -
Page 23: Amp2-Vs Interconnect Block Diagram
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information © 2004 Wohler Technologies Inc. ALL rights reserved... -
Page 24: Amp2-Vsa Interconnect Block Diagram
AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Section 3: Technical Information © 2004 Wohler Technologies Inc. ALL rights reserved... - Page 25 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A NOTES: NOTE: PCB layout and schematic support documentation is available upon request. Wohler Technologies, 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...
- Page 26 AMP2-VS and AMP2-VSA User Manual P/N 821583 Rev-A Wohler Technologies, 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 © 2004 Wohler Technologies Inc. ALL rights reserved...