© 2005 Wohler Technologies Inc. ALL rights reserved
6
VM SDI Digital Series
User Manual P/N
821625
Rev-
A
Mounting
The unit should be mounted where convenient for operating persons, ideally at approximately ear level for best high frequency
response. Its superior magnetic shielding eliminates concerns about locating it adjacent to most types of CRT monitors, including
even high-resolution color monitors.
Heat Dissipation
Heat dissipated by the speaker amps is conducted directly to the left side of the chassis; no special considerations for cooling are
necessary as long as the ambient temperature inside the rack area does not exceed approximately 40°C (104°F).
Sympathetic Vibration
Sympathetic vibration from other equipment (cables, etc.,) in the rack may be serious enough to interfere with the unit’s sound quality
out in the listening area. The use of thin card stock and/or felt or foam weather-stripping type materials between adjacent vibrating
surfaces, or tying up loose cables, etc., may be required to stop vibrations external to the unit.
Mechanical Bracing
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 around the unit.
Audio Connections
Connection of the audio feeds is straightforward. See the Rear Panel Features section on page
10
and the interconnect block diagram on
page
12
for information about audio connections.
Electrical Interference
Care should be exercised to avoid mismatched cable types and other similar causes of undesired reflections in digital signal systems.
If severe enough, such reflections can result in corruption of the digital datastream.
AC Power
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.
Installation
Section 1:
General Features, Specifications, and Installation
