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6-26
TECHNICAL DATA
Orban Model
464A
Abbreviations
Some
of
the abbreviations
used
in
this
manual
may
not
be
familiar
to
all
readers:
AGC
automatic gain
control
ATR
audio
tape recorder
dBu
OdBu
=
0.775V
RMS.
For
this
application, the
dBm
@
600t2
scale
on
voltmeters
can be
read
as
if
were
calibrated in
dBu.
EBU
European
Broadcasting
Union
EMI
electromagnetic
interference
FET
field
effect transistor
G/R
gain reduction
HF
high-frequency
IC
integrated
circuit
IM
intermodulation
(or
"intermodulation
distortion")
JFET
junction
field
effect transistor
LED
light-emitting
diode
LF
low-frequency
N&D
noise
and
distortion
PA
public address
system
PPM
peak program meter
RF
radio
frequency
RFI
radio-frequency
interference
RMS
root-mean-square
SCA
subsidiary
communications
authorization
(USA)
SPL
sound
pressure
level
STL
studio-transmitter link
TRS
tip-
ring-
sleeve
(stereo
phone
jack)
THD
total
harmonic
distortion
VCA
voltage-controlled amplifier
VHF
very high frequency
VTR
video
tape recorder
XLR
a
common
style
of 3-conductor audio connector
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