Studio Technologies IFB Plus 2001 - Manual (Page 19)

Model 2 User Guide Issue 7, November 2001
Studio Technologies, Inc. Page 19
cabinet, with a compact disc acting as our
program source. The amp, within reason,
really “kicked some tail!”
Connecting AC Mains Power
The Model 2 is factory configured to
operate from AC mains power of either
120 or 220/240V, 50/60Hz. In most cases,
units shipped to North America are factory
selected for 120V operation and are sup-
plied with an internal 0.5A, 5 x 20mm fast-
acting fuse. Most units shipped outside
North America are factory selected for
220/240V operation and are supplied
with a 0.25A, 5 x 20mm fast-acting fuse.
Before connecting the Model 2 to mains
power, determine the actual mains voltage
and confirm that the Model 2 has been
configured correctly, as an incorrect
setting could seriously damage the unit.
Should it be necessary to change the
unit’s operating voltage refer to the Tech-
nical Notes section of this guide. Because
the Model 2 contains no power switch it
will start operating as soon as mains
power is connected.
The Model 2 uses an IEC standard con-
nector to mate with the AC mains cord.
Normally the cord supplied has a North
American standard plug at one end and
an IEC connector at the other. In non-
North American applications the appropri-
ate plug must be attached. The wire colors
in the mains cord, in most cases, will
conform to the internationally recognized
CEE color code and should be wired
accordingly:
Connection Wire Color
Neutral (N) Light Blue
Live (L) Brown
Earth/Ground (E) Green/Yellow
Operation
The Model 2’s Front-Panel
Controls and Indicators
If you value equipment by the number
of switches and lights per rack space,
the Model 2 is really a good deal—there
is more stuff crammed onto the front panel
than we thought possible! Seriously, the
designers had the difficult problem of
getting maximum functionality into a
single rack space. We had heated argu-
ments about the feature list, what to in-
clude, what to delete. In the end, we feel
that all important features were included.
Once you understand all the functions, we
think you’ll find the Model 2 quite power-
ful, yet easy and intuitive to use.
Looking at the Model 2’s front panel from
the left to the right, you should note the
functional groups: internal interrupt micro-
phone, channel 1-related items, channel
2-related items, voice activated (VOX)
interrupt, telephone interface 1, telephone
interface 2, monitor amplifier, and power
LED. We’ll discuss these groups in the
following sections.
Internal Interrupt Microphone
The Model 2 contains an internal micro-
phone which can be used to access
either, or both, of the IFB channels. Two
momentary action push button switches
are located on the left end of the front
panel and are labeled IFB 1 and 2. Press-
ing either switch mutes (or optionally
dims) program audio, mutes the monitor
speaker output, and connects the micro-
phone to the selected IFB channel(s). The
IFB status LED associated with each chan-
nel will light whenever its corresponding
interrupt button is pressed. Notice that