BSS Audio
DPR-402 User Manual v3.0
Page 16
useful when a rack of equipment contains a number of
DPR-402
units; the ability
to immediately pick out the particular channel that is in danger of distortion will be
much appreciated.
11
.2 Output Level Meter and Meter Input Switch
This meter monitors the signal level at the output of the
DPR-402
, and gives an
absolute reading of its level.
This meter also incorporates the 'bright-up' feature, which will occur when the
output signal level r20dBv.
The METER INPUT switch is used in conjunction with the OUTPUT LEVEL meter
to allow the input signal to be displayed. The switch has a momentary action to
ensure that the meter is not inadvertently left showing input level.
This facility becomes extremely useful when used in conjunction with the BYPASS
switch. During initial setting up of routines and prior to going 'on-air', the signal
output level will be different from the input. Utilising this meter input switch will
enable the input and output levels to be compared on the same display, and
adjustments can then be made accordingly with the GAIN control to ensure that
the input and output levels are similar (the GAIN control will only affect the output
signal level). Once satisfied of this condition, operation of the BYPASS switch will
ensure an unnoticeable 'drop-in'.
11
.3 MON S.C. switch
This switch will change the output connector of the
DPR-402
from the normal
compressor output, and connect it to the return of the control side chain insertion
point. This will allow monitoring of any external equipment which is connected to
the unit to assist in its setting up. For applications and a description of side chain
insertions please
refer to sections 13; Rear Barrier Strip and 14; Operation and
Applications.
12 De-essing and Peak Limiting
12
.1 De-essing
In section 3; De-essing and Peak Limiting,
the problems with high frequency
energy, also known as sibilance, were discussed. The
DPR-402
provides for this
facility in either of two distinct ways: Broadband de-essing and HF only de-essing.
Under program conditions, once the detector detects excessive amounts of
frequency, it will start to gain reduce the program level as in normal compression.
Because compression then occurs over the whole frequency range of the program,
it is called Broadband de-essing. To make the compressor sensitive only to high
frequencies, a high pass filter is inserted into the CONTROL side chain insertion
