Owner's Manual
System Operating Frequencies
System
Operating Frequencies
Each
transmitter/receiver
system
operates on a choice
of
four
switch-
selected frequencies.
Available
frequencies are shown
below. All
frequencies may be combined for up
to
4
sim
ultaneous
ope
rating
channels.
Tra
veling frequencies normally
work
anywhere
in
the
USA and
Canada.
Not
all
frequencies
available
in
all areas outside the US.
Please check
with
local
regulations.
System
9 Operating Frequencies/Channels
Channel
Frequency-
MHz
Frequency
Code
1 169.5
05
T2
2
170.245
T3
3
171.045
T5
4 171.905
T8
7
System
9
Installation
and Operation
RF
Interference
Please
note
that
wireless
frequencies are shared
with
othe
r radio ser-
vices. According
to
Federal
Communications
Commission
regulations,
"Wireless
mic
r
ophone
operations are unprotected
from
interference
from
other
licensed
operations
within
the
band.
If
any interference is
received by any Government
or
non-Government operation, the
wireless
microphone
mus
t cease operation ... "
If
you need assistance
with
operation or frequency
selec
ti
on, please
co
ntact
your
dealer
or
the Audio
Solutions at Audio-Technica U.S.
Extensive
w ireless
information
also
is
available
on
the
A-T
Web
site
at
www.audio-technica.com.
For
future
reference,
please
record
your
system
information
here.
The
serial
number
appears
inside
the
battery
compartment
in
each
transmitter
,
and
on
the
bottom
of
each
receiver.
Receiver
Model
ATW
-
R900a
Transmitter
Model
ATW-T90
1a
or
2a
Specifications
OVERALL
SYSTEM
Operating Frequencies
VHF
highband,
169
MHz
to
172
MHz
Modulation Mode FM
Maximum Deviation
±10kH
z
Dynamic
Range
~90
dB
(A-weighted).
typic
al
Total
Harmonic
Di
stortion
<
1.5
% (at 1
kHz,
±10kHz
deviation)
Operating
Range
200'
(60
m)
typi
cal
Op
en
range
en
v
iro
nm
ent
with
no
int
erfer
ing
signa
ls
Operating
Temperature
Range
40°
F
W
C)
to
110°
F
(43°
C)
Frequency Response
RECEIVER
Receiving System
Image
Rejection
RF
Sensitivity
Normal Output Level
XLR,
balanced:
'/."
(6
.3 mm).
unbalanced:
Power Supply
Dimensions
Net Weight
Accessory
In
cluded
Battery performance may be reduced
at
v
ery
low
t
em
pe
ratures
80
Hz
to
13
kHz
Non-diversity,
single-ch
an
nel,
du
al
antenna system
50
dB
minimum
20 dBuV at
60
dB
S/
N ratio
(50
ohms termination)
350 mV
(1
kHz
modulati
on,
10
kH
z
deviati
on,
100k ohm
l
oad)
700 mV
(1
kHz m
od
ulati
on,
10kH
z
deviation,
100k ohm
l
oad)
100
-240V
AC
(50/60
H
z)
to
12V
DC
.5A
(center positive) switched mode
external
power supply
748'
(190.0
mm) W x
1.82"
(46
2 mm) H x
5.06"
(128.5 mm) D
12
.0
oz
(337 grams)
Power
supply
Seria
l
Numb
er
Serial
Num
ber
UNIPAK
"'
TRANSMITTER
RF
Output Power
Spurious
Em
i
ss
ions
Input
Connection
Batteries
(n
ot i
nc
lud
ed)
Battery Life
Dimensions
~
M
Net Weight (without batteries)
HANDHELD
TRANSMITTER
RF
Output Power
Spurious Emissions
Batteries (not
included)
Battery Life
Dimensions
Net Weight (without batteries)
Accessory
In
clu
ded
10mW
Fo
ll
owing
federal
and
natio
na
l
re
gulations
Fo
ur
-pin Locking
Connector
Pin
1: GND,
Pin
2:
INST INPUT,
Pin
3:
MIC
INPUT,
Pin
4:
DC BIAS
+9V
T
wo
1.5V
AA
8 hours (alkalin
e)
Depending on battery type and use pattern
2
.7
6"
(7
0.2
mm) W
x
4.08'
(103
.7 mm) H
x
0.
98"
(24.9 mm) D
2.8
oz
(80
.0
grams)
10mW
Following federal
and
national regulations
Two
1.5V
AA
8 hou
rs
(alkaline)
Depending on battery
ty
pe
a
nd
use pa
tt
ern
9
.9
1'
(251.8
mm)
l
ong,
2.
1
1"
(53
.5 mm) diameter
9.2
oz
(260
grams)
AT8456a Quiet-F
le
x
'"
stand clamp
'
In
the interest of standards development,
A.1U.S.
offers
fu
ll
details
on
its test me
th
ods to
other
indu
stry
pr
of
e
ss
ionals
on
request.