Studio Technologies IFB Plus 2007 - Manual (Page 22)

Issue 9, January 2006 Model 2 User Guide
Page 22 Studio Technologies, Inc.
boosted, and a “hot” signal can be attenu-
ated. The trim pot is accessible via a small
hole in the front panel, directly to the right
of the routing control switch. The trim pot is
active only in the receive mode.
Monitor Output
A level control and source select switch is
associated with the monitor section. The
level control adjusts the output level sent to
the external monitor speaker. IFB channel 1
is monitored when the source select switch
is in the up position. In the down position,
channel 2 is monitored. The middle position
is labeled OFF and the monitor amplifier is,
as you might guess, off!
Power Indicator Light
A red LED indicator light located on the right
side of the front panel is lit any time mains
power is applied to the Model 2. Since the
Model 2 does not contain a power switch,
the power LED should be lit at all times that
power is applied to your equipment racks.
It’s Time to Use the System!
Operation can commence after the Model 2
and related equipment have been installed
and connected. The power LEDs on the
Model 2 and, if present, Model 32A and/
or Model 33 Talent Amplifiers should be
lit. If one or more Model 22 or Model 24
Access Stations are installed, their push-
button switches should be dimly lit.
Earpieces should be connected to the
talent amplifiers. Both the Model 32A and
Model 33 Talent Amplifiers utilize a ¼-inch
2-conductor phone jack for their audio out-
put. For convenience, the Model 32A also
provides a 3.5 mm output jack. On the Mod-
el 32A, either IFB channel can be selected
as the audio source. On the Model 33, either
or both IFB channels can be selected as the
audio source(s). The level control(s) should
be adjusted for the desired level during an
interrupt from the Model 2’s internal micro-
phone. Note that the even when the level
control(s) are set to the fully counterclock-
wise position, the audio output will not be
fully “off.” This ensures personnel will never
(hopefully!) miss an important cue because
a level control was accidentally turned “off.”
Once the talent amplifier’s output level has
been set, a Model 2 program source can
be selected and the program level control
on the Model 2 adjusted as required. Re-
member that the nominal interrupt level is
internally set in the Model 2, and acts as the
system reference.
In the following paragraphs we’ll describe
several simple procedures you can use to
try out the Model 2’s features.
Connect a high quality audio source, e.g.,
compact disc or MP3 player, to a program
input. Select it as the program audio source
for one of the IFB channels. Set the program
level control to get the yellow meter LED
lighting on signal peaks. Test the monitor
amp—it should let you “rock out” pretty
well. If not, put in a maintenance request
for a better speaker!
Bring an audio source into the auxiliary au-
dio input and test the VOX interrupt feature.
Set the VOX input switch to the middle posi-
tion, connecting the auxiliary audio input to
the VOX circuitry. Use the VOX output switch
to assign the VOX output to one of the IFB
channels. On the channel you selected for
VOX interrupt watch the VOX and IFB status
LEDs light when signal is detected. Use the
monitor amplifier to monitor VOX interrupt
activity.
Try receiving audio via telephone interface 1.
Use the receive audio as a program source.
Use the receive level trim pot to vary the