Studio Technologies 2A 2015 - Manual (Page 28)

Issue 2, March 2015 Model 2A User Guide
Page 28 Studio Technologies, Inc.
pressing one of these buttons will cause
the program audio source to mute, replaced
with signal coming from the internal micro-
phone. The level of the local interrupt audio
signal is controlled using the compressor
circuits. No user level controls are provided.
Talent Amplifiers
Connect an earpiece to an associated talent
amplifier. (The Models 32A and 33A Talent
Amplifiers provide their audio output signals
on a ¼-inch 2-conductor phone jack and a
3.5 mm output jack.) Carefully adjust the
level control, starting at the fully counter-
clockwise position. You should be able to
hear the program audio and, when a front-
panel IFB button is pressed, interrupt audio.
On the Model 32A, a switch allows either
IFB channel to be selected as the audio
source. On the Model 33A, either or both
IFB channels can be selected as the au-
dio source(s). The level control(s) should
be adjusted for the desired level during an
interrupt from the Model 2A’s internal mi-
crophone. Then the program level should
appear at the correct level. (If not, adjust the
relevant program level control on the Model
2A.) Note that the even when the head-
phone level control on the Model 32A or
33A is set to its fully counterclockwise posi-
tion, the audio output will not be fully “off.”
This ensures personnel will never (hopeful-
ly!) miss an important cue because a level
control was accidentally turned “off.”
VOX IFB Operation
To test the VOX interrupt feature, bring an
audio source into the auxiliary audio input.
Set the VOX input switch to the middle posi-
tion, labeled AUX, which routes 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 output to listen
to VOX interrupt activity.
Telephone Interface 1
As an introduction to telephone interface 1,
begin by receiving audio via the interface.
Use this audio signal as a program audio
source. The receive level trim pot can be
used to adjust the level of the audio signal.
(An Xcelite “greenie” screwdriver works
great.) Try using the receive audio from tele-
phone interface 1 as a source for the VOX
interrupt function.
Telephone Interface 2
Telephone interface 2 has two additional
features: the ability to send IFB audio and
auto answer. It can be worthwhile to experi-
ment with using these features. Telephone
interface 2 allows audio from either of the
IFB channels to be sent out the telephone
interface. Use the audio routing switch to
send IFB channel 1 or IFB channel 2 audio
out the telephone interface. Also, try out the
process of receiving audio from the inter-
face, using it as a program or VOX audio
source.
When telephone interface 2 is set for the
telephone line mode the RING/LC LED will
flash on and off whenever ringing energy
is present on the connected telephone line.
Depending on the selected configuration the
interface may automatically answer in re-
sponse to a ringing signal. The configuration
choices are to answer after one, two, or four
rings or not to auto answer at all. From the
factory the typical setting is to answer after
one ring. When configured for auto-answer
the interface will answer one second after
the end of the selected number of “rings.