Amron 2830A/24 Series, Руководство пользователя

Страница: 36 / 60

2830A UM
8.3
M
A
d
p
fie
th
ad
so
d
co
C
th
of
th
8.2.2 IS
In
ca
R
co
co
E
lo
im
th
m
co
im
vo
le
WHY FU
Amron Dive
as well as
common-m
less loading
wired in pa
the same
separating
increases b
noise and im
Amron Diver
ifferential inpu
air carries an
eld that is in o
he radiated e
ddition, any
ource, will be
ifferential mi
ommon-mode
Communicator
he performan
f the common
he power of A
SN'T ROUND
n Round Rob
able like the A
Round Robin
onnected to t
onnected in p
Each microph
ower output.
mpedance of
he diver micro
microphone is
ommonly ha
mpedance is
olume imbala
ess system sta
ULL DUPLEX
er Communic
for the tend
mode rejection
g of the micro
rallel with the
as the earph
the microph
by 285%. Wi
mproved syst
Communica
ut and output
n equal and o
opposition wi
lectromagnet
external field
e coupled to b
icrophone am
e signal w
rs without bo
ce of Amron
n-mode coup
Amron's Full D
D ROBIN THE
bin communic
Amron Full Du
systems all t
the microphon
parallel and c
one is loade
In a two div
8 Ohms and
ophone outpu
attenuated b
ve an imped
around 175
ance which re
ability.
X (4-WIRE)?
cator uses an
der. This allo
n to cancel an
ophone than
e diver earpho
hones, the s
hone from th
th more sign
tem stability f
33
ators are de
t amplifiers. In
opposite sign
th the field of
ic field is sign
ds, either from
both wires eq
mplifier in A
while amplify
oth differentia
Diving Comm
ling effect an
Duplex (4-Wire
E SAME THIN
cation system
uplex (4-Wire
the micropho
ne input of th
connected to
ed by all the
ver setup wh
the tender's
ut level will b
by out 95%.
dance of 8
Ohms. Thes
quires higher
?
n independen
ows Amron D
y coupled no
in 2-Wire mo
ones. Assum
signal from t
he earphones
al, the volum
for a significan
M
esigned with
n a balanced
al. Each wire
f other wire. T
nificantly redu
m the other
qually creatin
Amron Diver
ying the si
al input and o
municators. T
nd common-m
e) mode of op
NG?
ms, each dive
e) mode. This
ones are conn
he communica
o the earphon
other microp
here the dive
microphone h
be reduced by
On the earph
Ohms while
se two factor
r volume setti
t microphone
Diver Commu
ise for each m
de. In 2-Wire
ing that the im
the micropho
s, the outpu
me level can
nt improveme
MODEL 2830
h a special
circuit, each
e generates a
The net result
uced if not to
wire pair or
ng a common
Communica
gnal from
output amplif
This is an ext
mode signal re
peration.
er is connect
is where the
nected togeth
ator. All the e
ne output of t
phones in th
er microphon
has an imped
y about 50%
hone side, th
e the typical
rs combine to
ings resulting
e amplifier for
unicators to
microphone a
e mode, the d
mpedance of
one is attenu
ut signal from
be decrease
ent in overall c
0A USER MAN
REV
balanced c
wire in the tw
an electromag
t is that stren
otally eliminat
an external
n-mode signa
ators cancels
the microp
fiers cannot m
reme simplific
ejection but s
ed using a 4
similarities e
her in paralle
earphones are
the communi
he system ca
nes have a t
dance of 150
while the ten
e diver earph
tender earp
o create a se
in more nois
r each diver c
use the pow
as well as prov
diver micropho
f the micropho
uated by 65%
m the microp
ed resulting in
clarity.
NUAL
3.0
circuit,
wisted
gnetic
gth of
ted. In
noise
l. The
s the
phone.
match
cation
shows
4-Wire
end. In
el and
e also
icator.
ausing
typical
Ohm,
nder's
hones
phone
erious
se and
circuit
wer of
viding
one is
one is
%. By
phone
n less