Справочник Пользователя для StudioTech 233

of capabilities many other specialized 
“behind-the-scenes” applications can 
also be implemented.

A high-performance microphone preampli-
fier circuit provides low-noise/low-distortion 
amplification over a 20 to 60 dB gain range. 
The gain is adjustable in 10 dB steps. The 
input is compatible with balanced dynamic 
and condenser microphones. The micro-
phone power source is 48 volts nominal 
and meets the worldwide P48 phantom 
standard. An LED indicator serves as an 
aid for optimizing the preamplifier’s gain 
setting. The output of the microphone pre-
amplifier is used by the main output as well 
as being routed to the compressor circuit 
that supports the talkback functions.

The Model 233 provides a main output that 
is designed to serve as the on-air, stadium 
announcement, or other primary audio 
feed. Nominally –2 dBu, it is designed as a 
fully professional interface with high output 
capability, low distortion, and low noise. 

The output circuitry features a high-
performance output transformer 
expressly designed for professional 
audio applications.

The talkback functions are intended 
to provide personnel associated with 
production trucks, control rooms, live-
performance, and sports venues with 
talent-originated cue signals. The Model 
233 contains two pushbutton switches 
that control the talkback functions. As-
sociated with each pushbutton switch is a 
dedicated line-level talkback output. Each 
pushbutton switch can also be configured 
to send audio to one specific channel 
associated with the Model 233’s dual-
channel intercom interface.

The line-level talkback outputs are 
transformer-coupled with a +4 dBu 
nominal signal level. They contain resis-
tors in series with the output connectors, 
allowing line-level talkback outputs from 
multiple units to be directly “summed.”

For non-on-air applications, a special 
Model 233 feature set can be enabled by 
placing the unit in its “production” mode. 
This software-based mode allows the