Specifications

8
noise, an equalizer filter set may then be adjusted to give the desired room response
curve. The results of the filter adjustments are continuously displayed on the Model 140
so that filter adjustments are quickly made.
In the installation of a masking noise system for an open plan office, a shaped noise
spectrum is desirable and will usually be specified. This implies the installation of a noise
generator system that contains equalizing filters that are adjustable on the job, as well as
the use of test equipment capable of spectral analysis to meet the specifications. The
Model 140 is fully portable and its electrical parameters are adapted to this application.
As a rack-mounted unit, the Model 140 may be used in a transportable sound
reinforcement system. Because of the internal noise generator and highly readable
display, an equalizer set may be very quickly be adjusted to a new set of installation
conditions. Equalization may also be verified in a short time.
It may also be used for continuous display of program material where it is desirable to
monitor for unusual spectral content. It occupies only 3 1/2" in a rack and the display is
readable from a distance and has a high level of light intensity for use under adverse
conditions.
* see D.8.f in the Operating Instructions section.