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VM SDI Digital Series
1U Analog/Digital Audio Monitors
(VMSDA-1 and VMMDA-1)
Document P/N 821625 Rev-A
with One SDI or SDI and HD-SDI Input and Re-clocked Output
on BNC, One AES input on BNC or Phoenix, Analog input on
"mini" Phoenix, SDI Group Eight Channel Pair selection, Stereo
Analog Output of Selected Source on "mini" Phoenix,
Two 10-Segment Level Meters, and Phase Indication
Title and Contents ........................................................
..........................................................................
Section 1: Features, Specs, and Installation ......
Description and Features .......................................................
Applications and General 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 information ...............................................
VM Main PCB (P/N 919141-1)Trimpot Locations.....................
VM SDI Digital Series Interconnect Block Diagram .................
© 2005 Wohler Technologies Inc. ALL rights reserved
User Manual
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Summary of Contents for Wohler VMSDA-1
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Page 1: Table Of Contents
Audio Amplifier and Speaker Configuration ......Balance Control Characteristics ..........Section 3: Technical Information ......General Technical information ..........VM Main PCB (P/N 919141-1)Trimpot Locations..... VM SDI Digital Series Interconnect Block Diagram ....© 2005 Wohler Technologies Inc. ALL rights reserved... -
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: Installation
VM SDI Digital Series User Manual P/N 821625 Rev-A Section 1 General Features, Specifications, and Installation Description Features Applications General Specifications Installation © 2005 Wohler Technologies Inc. ALL rights reserved... - Page 4 The single-rackspace VM SDI Digital Series audio monitors permit stereo monitoring with excellent fidelity exceeding that of ordinary monitors. In this series the VMSDA-1 monitors analog, AES, and standard SDI audio sources while the VMMDA-1can monitor analog, AES, standard SDI, or HD-SDI audio sources.
- Page 5 Units are certified to meet, at time of manufacture, all currently applicable product safety and EMC requirements, such as those of CE. 0 dbV ref. 0.775V RMS. Features and specifications subject to improvement without notice. © 2005 Wohler Technologies Inc. ALL rights reserved...
- Page 6 The unit's AC mains connection is via a standard IEC inlet, with safety ground connected directly to the unit's chassis. The universal AC input (100-240VAC, 50/60Hz) switching power supply is a self-resetting sealed type, with automatic over-voltage and over- current shutdown. There is no user-replaceable fuse in either the primary or secondary circuit. © 2005 Wohler Technologies Inc. ALL rights reserved...
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Page 7: Section 2: Operation
VM SDI Digital Series User Manual P/N 821625 Rev-A Section 2 Operation Front Panel Features Rear Panel Features © 2005 Wohler Technologies Inc. ALL rights reserved... - Page 8 Please refer to Figure-2a on the facing page to familiarize yourself with the front panel features of the VM SDI Digital Series units. The following sections describe these features and are referenced, by number, to Figure-2a. Note that even though only the VMMDA-1 front panel is shown, features and operation are identicle for the VMSDA-1. Speakers (Left, Right, and Woofer) The VM SDI Digital Series audio monitors feature two mid-range speakers (left and right) and one woofer speaker.
- Page 9 VM SDI Digital Series User Manual P/N 821625 Rev-A Section 2: Operation Figure-2a: Front Panel Features © 2005 Wohler Technologies Inc. ALL rights reserved...
- Page 10 SDI Input Connector This BNC input connector (SDI IN) is configured for unbalanced, 75 Ω Ω Ω Ω Ω impedance connections. In the VMSDA-1 model, this input accepts standard SDI formatted digital signals. In the VMMDA-1 model, this input accepts either standard SDI or HD-SDI (high-definition SDI) formatted digital signals.
- Page 11 Section 2: Operation VM SDI Digital Series User Manual P/N 821625 Rev-A Figure-2b: Rear Panel Features © 2005 Wohler Technologies Inc. ALL rights reserved...
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Page 12: Audio Amplifier And Speaker Configuration
See the VM Series (1U) Audio Amplifier and Speaker Block Diagram above for placement of the balance control in the audio amplifier circuit. © 2005 Wohler Technologies Inc. ALL rights reserved... -
Page 13: Section 3: Technical Information
VM SDI Digital Series User Manual P/N 821625 Rev-A Section 3 Technical Information General Technical Observations VM Main PCB Trimpot Locations VM SDI Digital Series Interconnect Block Diagram NOTE: PCB layout and schematic support documentation is available upon request. © 2005 Wohler Technologies Inc. ALL rights reserved... -
Page 14: Level Adjustment
Then adjust the trim pots P6 and P7 so that the front panel bargraph meters read zero level. See Figure-3a on the facing page for the trim pot locations on the VM main PCB (P/N 919141-1). © 2005 Wohler Technologies Inc. ALL rights reserved... -
Page 15: Vm Main Pcb (P/N 919141-1)Trimpot Locations
VM SDI Digital Series User Manual P/N 821625 Rev-A Section 3: Technical Information VM Main PCB (P/N 919141-1) Trimpot Locations © 2005 Wohler Technologies Inc. ALL rights reserved... - Page 16 VM SDI Digital Series User Manual P/N 821625 Rev-A Section 3: Technical Information © 2005 Wohler Technologies Inc. ALL rights reserved...
- Page 17 VM SDI Digital Series User Manual P/N 821625 Rev-A Section 3: Technical Information NOTES: © 2005 Wohler Technologies Inc. ALL rights reserved...
- Page 18 31055 Huntwood Avenue 31055 Huntwood Avenue Hayward, CA 94544 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 © 2005 Wohler Technologies Inc. ALL rights reserved...
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