Studio Technologies IFB Plus 2001 - Manual (Page 23)

Model 2 User Guide Issue 7, November 2001
Studio Technologies, Inc. Page 23
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 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
audio input and test the VOX interrupt
feature. Set the VOX input switch to the
middle position, 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 receive audio level. Use the
receive audio as a source for the VOX
interrupt function.
Telephone interface 2 has more features;
try them all. If set for the telephone line
mode, let the interface automatically
answer an incoming telephone call. Use
the interface to receive, as well as send
audio. Use the receive audio as a program
source. Use the receive level trim pot to
vary the receive audio level. As with inter-
face 1, use the receive audio as a source
for the VOX interrupt.
Test the Model 22 Access Stations. Is the
interrupt audio loud and clear? Observe
the status lamps inside the push button
switches. Do the appropriate lamps light
fully bright when an interrupt takes place?
If an access station is configured to mute
the Model 2’s monitor output, ensure that
the monitor speaker does mute during an
interrupt.
In all cases, you should hear clear, click-
free audio. We intended the Model 2 to
sound great—if not, call us for technical
help. A completed installation should
be reliable, easy to use, and perform to
high sonic standards. Questions and
comments from the field are welcomed
and encouraged!
Technical Notes
Schematic Diagrams
Schematic diagrams are provided to all
purchasers of IFB Plus systems. The
schematics show the graphical represen-
tation of all the electronic components,