UNIVERSAL AUDIO Model 175 B LIMITING AMPLIFIER
3
g.
Decrease attenuation with the output attenuator until the desired output
level is observed on the meter.
h.
Return the meter switch to GR position to verify amount of limiting
during operation.
Note: The output level may be increased 6 dB by replacing the output attenuator
with Langevin model AT 601 attenuator.
ATTACK AND RELEASE TIME
The ATTACK and RELEASE potentiometers should be adjusted for optimum
results in accordance with the type of program material being used. The
following general suggestions are given for use of ATTACK and RELEASE
adjustments:
a.
For vocal or narration program material with minimum low frequency
information, best results are usually obtained by adjusting for very fast
attack and release times.
b.
The release time should be lengthened as the low frequency content of the
program material increase.
c.
The attack time should be lengthened when the program material
contains tremolo or vibrato which the limiter might possibly follow.
The limit defeat switch is located on the attack potentiometer. By turning the
attack control full counter clockwise, the limiting action may be defeated and the
unit perform as a normal line amplifier.
