System 9
Installation and Operation
7
4
3
2
1
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-R900
Serial Number
Transmitter
Model ATW-T90
Serial Number
1 or 2
OvERALL SySTEm
Operating Frequencies
VHF highband, 169 MHz to 172 MHz
Modulation Mode
FM
Maximum Deviation
±10 kHz
Dynamic Range
≥90 dB (A-weighted), typical
Total Harmonic Distortion
<1% (at 1 kHz, ±10 kHz deviation)
Operating Range
200' (60 m) typical
Open range environment with no interfering signals
Operating Temperature Range
40° F (4° C) to 110° F (43° C)
Battery performance may be reduced at
very low temperatures
Frequency Response
80 Hz to 13 kHz
RECEIvER
Receiving System
Non-diversity, single-channel,
dual antenna system
Image Rejection
50 dB minimum
RF Sensitivity
20 dBuV at 60 dB S/N ratio
(50 ohms termination)
Normal Output Level
XLR, balanced:
350 mV (1 kHz modulation, 10 kHz
deviation, 100k ohm load)
1
/
4
" (6.3 mm), unbalanced:
700 mV (1 kHz modulation, 10 kHz
deviation, 100k ohm load)
Power Supply
100-240V AC (50/60 Hz) to 12V DC .5A
(center positive) switched mode external
power supply
Dimensions
7.48" (190.0 mm) W x 1.82" (46.2 mm) H x
5.06" (128.5 mm) D
Net Weight
12.0 oz (337 grams)
Accessory Included
Power supply
UnIPAk
®
TRAnSmITTER
RF Output Power
10 mW
Spurious Emissions
Following federal and national regulations
Input Connection
Four-pin Locking Connector
Pin 1: GND, Pin 2: INST INPUT,
Pin 3: MIC INPUT, Pin 4: DC BIAS +9V
Batteries (not included)
Two 1.5V AA
Battery Life
8 hours (alkaline)
Depending on battery type and use pattern
Dimensions
2.76" (70.2 mm) W x 4.08" (103.7 mm) H
x 0.98" (24.9 mm) D
Net Weight (without batteries)
2.8 oz (80.0 grams)
HAnDHELD TRAnSmITTER
RF Output Power
10 mW
Spurious Emissions
Following federal and national regulations
Batteries (not included)
Two 1.5V AA
Battery Life
8 hours (alkaline)
Depending on battery type and use pattern
Dimensions
9.91" (251.8 mm) long,
2.11" (53.5 mm) diameter
Net Weight (without batteries)
9.2 oz (260 grams)
Accessory Included
AT8456a Quiet-Flex
™
stand clamp
†
In the interest of standards development, A.T.U.S. offers full details on its test methods to
other industry professionals on request.
Specifications
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 simultaneous operating
channels.
Traveling 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
169.505
T2
2
170.245
T3
3
171.045
T5
4
171.905
T8
RF Interference
Please note that wireless frequencies are shared with other radio ser-
vices. According to Federal Communications Commission regulations,
“Wireless microphone 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 must cease operation...”
If you need assistance with operation or frequency selection, please
contact your dealer or the Audio Solutions at Audio-Technica U.S.
Extensive wireless information also is available on the A-T Web site at
www.audio-technica.com.
