Specifications
OVERALL SYSTEM
Operating Frequency UHF band, 656.125 to 678.500 MHz
Number of Channels 10 total
Frequency Stability  ±0.005%, Phase Lock Loop frequency 
control
Modulation Mode  FM
Normal Deviation  ±5 kHz
Operating Range  300' typical
Operating Temperature Range  41° F (5° C) to 113° F (45° C)
Frequency Response  100 Hz to 15 kHz
RECEIVER
Receiving System  Dual independent receivers, automatic-
switching diversity
Image Rejection  55 dB nominal, 50 dB minimum
Signal-to-noise Ratio  >100 dB at 40 kHz deviation 
(A-weighted), maximum modulation 
40 kHz
Total Harmonic Distortion <1% (±10 kHz deviation at 1 kHz)
Sensitivity 20 dBµV (S/N 60 dB at 5 kHz deviation, 
IEC-weighted)
Intermediate Frequency 65.75 MHz, 10.7 MHz
Audio Output (AF Level set at “0”)
Unbalanced:  25 mV (at 1 kHz, ±5 kHz deviation, 
100k ohm load)
Balanced:  12.5 mV (at 1 kHz, ±5 kHz deviation, 
100k ohm load)
Output Connectors
Unbalanced:
1
/
4
" phone jack
Balanced: XLRM-type
Power Supply  120V AC 60 Hz, or 12-18V DC, 
350 mA, 
with external supply
Dimensions  8.27" (210.0 mm) W x 1.73" (44.0 mm) H 
x 6.39" (162.2 mm) D
Weight  2.2 lbs (1.0 kgs)
Accessories Included  Two flexible UHF antennas, rack-mount 
adapters, AC adapter
Specifications
†
UNIPAK
™
TRANSMITTER
RF Power Output  12 mW  
Spurious Emissions  Under federal regulations
Input Connections  High impedance, low impedance, bias
Batteries (not included) Two 1.5V AA alkaline 
Current Consumption  150 mA typical
Battery Life  Approximately 9 hours (depending on 
battery type and use pattern)
Dimensions  2.60" (66.0 mm) W x  3.63" (92.3 mm) H 
x 0.89" (22.5 mm) D
Net Weight (without batteries)  2.82 oz (80 g)
Accessory Included Guitar cable
HANDHELD TRANSMITTERS
RF Power Output  12 mW
Spurious Emissions  Under federal regulations
Microphone Element Dynamic, unidirectional
Batteries (not included) Two 1.5V AA alkaline 
Current Consumption 150 mA typical
Battery Life  Approximately 9 hours (depending 
on battery type and use pattern)
Dimensions 9.02" (229.0 mm) long x 2.11" (53.5 mm) 
maximum diameter
Net Weight (without batteries) 7.81 oz (221.5 g)
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 are subject to change without notice.
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