Studio Technologies 45A - Manual (Page 11)

Model 45A User Guide Issue 2, November 2011
Studio Technologies, Inc. Page 11
length of their interconnecting cables. A
final location criterion is to provide access
to the Model 45A’s front panel. An optimal
location will allow convenient use of the
auto null pushbutton and easy observation
of the level meters and status LEDs.
Protecting the Enclosure
The Model 45A is shipped as a self-
contained unit suitable for portable use.
Installed on the bottom of the chassis are
screw-on “bump on” protectors. These
are useful if the unit is going to be placed
on surfaces where scratching of either
the Model 45A or the surface could take
place. They can be removed, without the
use of a tool, when rack-mounting the unit.
Rack Mounting the Model 45A
For permanent or mobile applications it’s
possible to mount one or two Model 45A
units into one space of a 19-inch rack
enclosure or one unit in a special 10.5-
inch rack. Three rack-mount front panels,
purchased separately, are available from
Studio Technologies. Refer to Figure 3 for
a view of the Model 45A in the “1/2-rack”
front panel.
The following provides details on how
to install and use the panels. To attach
a Model 45A unit to either one of the
single-unit rack-mount panels, begin the
process by removing the four 4-40 thread
hex-head screws that hold the cover onto
the chassis. This requires the use of a
5/64-inch hex wrench. Save the cover,
screws, and lock washers for later use.
With the cover removed, observe the
cable and 3-position socket that are
part of the 3-pin male XLR connector
assembly that’s attached to the standard
front panel. Carefully detach the socket
from the 3-pin header, located on the main
printed circuit board adjacent to the back
panel. Remove the 3-pin male XLR con-
nector from the front panel by removing
the two Philips-head machine screws.
Save the XLR assembly and associated
screws for later use.
Use the 5/64-inch wrench to remove the
four 4-40 thread hex-head machine screws
that hold the standard front panel to the
chassis. Save the screws for reuse. Care-
fully protect and store the standard front
panel for possible later use. Using the
screws that were just removed, attach
the rack-adapter front panel to the Model
45A’s chassis. To prevent damage ex-
treme care is required when aligning the
front panel with the LEDs, DIP switch, and
auto null pushbutton switch that protrude
through both the Model 45A’s chassis and
front panel. Tighten the four screws only
after a careful inspection, ensuring that
all parts protrude through the front panel
without interference. Reattach the 3-pin
male XLR assembly to the front of the rack
panel using the two Philips-head screws.
Figure 3. Model 45A shown in optional single-unit “1/2-rack” front panel