Page 5Supplement to Model 2020 Fm Pro Manual
Input VU Level indicators show
audio input relative to the currently
set input reference. The input
reference level is usually set to
cause a program reference tone
to read zero VU. With a digital
input, zero VU corresponds to
10dB below digital peak maximum
(i.e., digital -10dB).
Multiband Compressor indicators show gain reduction for
all four bands. The left and right channel gain reductions
are “shadowed” into one set of meters to streamline the
panel design. The range of gain reduction is 1.5 to 15dB
in steps of 1.5dB.
Spin Dial is used with the menuing
system to control parameters with-
in the MkIII.
Liquid Crystal Display contains all
operating menus and messages.
Menus are navigated by use of the
cursor, enter, and escape keys. A
fall-asleep timer dims the display
when no activity is sensed for a user
settable time period. The display
brightens whenever any button is
depressed or spin dial is moved.
Leveling Meter indicates the amount
of automatic gain correction pres-
ently taking place. The scale goes
from +15dB to -7dB in 2.5dB
steps. The indication will be zero
dB for a true reference level input
tone.
Input Processing indicators show
the current on-air status of all vital
process functions which are on/off
in nature.
Multiband Coupling indicators show
the status of the left-to-right and
band-to-band coupling coefficients
within the multiband compressor
subsystem.
Limiter Indicator shows peak audio
limiting prior to pre-emphasis. The
scale is 1 to 10dB in 1dB steps.
Pre-emphasis processing (when
installed) is not displayed.
Headphone Jack allows monitoring
of the input signal (analog and digi-
tal) as well as the processed output
signal. The volume for each selec-
tion is separately adjustable through
the menu to allow good a/b com-
paring of the processed sound. A
proper de-emphasis filter is auto-
matically inserted in the output
monitor when pre-emphasis pro-
cessing is installed.
Output Status indicators show if the
analog and digital outputs are cur-
rently turned on or off and whether
the FM Pro has been bypassed.
When bypassed, the analog and
digital input jacks are coupled direct-
ly to their respective output jacks
through metallic relay contacts to
assure signal throughput for testing
or emergency operation. Bypass is
defaulted when the power is shut
off.
Navigation Buttons operate the
menus and allow entry and escape
from every function. Buttons are
continuously lighted for better visi-
bility.
MkIII Front Panel
LCD Contrast control.