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APPLICATION NOTES/
As new types of HSS applications are studied and measured in the field, ATC will publish
application notes with more specific details regarding each installation type, best practices,
suggestions, cautions, and answers to many of your questions. They will be available on our
website in the future.
www.atcsd.com
MAINTENANCE/
Cleaning
Dust:
It is recommended that the HSS unit be kept free from excessive dust. A small computer
style vacuum or compressed air may be used to remove excessive dust from the surface of
the emitter and around the controls. Routinely remove dust from the rear fan cover and air
vents surrounding the unit.
Emitter Surface:
DO NOT ATTEMPT to clean the surface
of the emitter with any device other
than compressed air at less than 10 PSI. (Use only low PSI compressed air available in small spray
cans from all electronics stores).
Troubleshooting/
• Check to be sure that the green status LED is on.
NO AUDIO OUTPUT FROM HSS DEVICE: (real-time unit)
• Turn off AC power. Reapply power to the unit.
• Be sure the volume setting has not been turned down or off.
• Be sure that the audio input connector is properly inserted into the connector.
• Ensure that an appropriate audio signal is being fed to the input connector.
12
ULTRASONIC & DSP PROCESSING
Carrier Frequency:
approx. 48 kHz
Modulation Method:
Proprietary Dynamic Carrier
HSSound™:
Version 1.0
ULTRASONIC EMITTER
Type:
ATC proprietary PVDF Piezo Film device
AUDIO
Analog Input Section:
Input Impedance: (real time unit)
10
Ω
Ω
A/D Converter:
16 bit
Input Connector:
3.5mm female STEREO (tip, ring, sleeve) mini jack
Input Channels:
Two # 1(Tip + Sleeve) # 2 (Ring + Sleeve)
System Configuration:
Monaural (Two input channels summed together at input stage)
Nominal Input Level:
1.0 V p-p, each channel.
Max Input Level Before Clipping:
2.0 V p-p, each channel
System:
Bandpass Filtering:
400 Hz – 16 kHz
Max Audio SPL Output:
See Measurement Section
Compression Ratio:
2:1
POWER AMPLIFICATION (ALL UNITS)
Amplifier Type:
Proprietary Class D – ATC ModAmp™
Amplifier Power Output Potential:
200 watts
Amplifier Efficiency:
>90%
ELECTRICAL
AC Power Cord Length:
1.83 m (6 ft.)
POWER REQUIREMENTS
NOTE: Units are prewired for correct input voltage. Check rear panel for specific unit operating voltage
Wattage:
120 watts
MECHANICAL
Physical Dimensions: Depth (Front to Back) Height (Top-Bottom) Width (Left-Right)
88 mm (3.5 ”) 280 mm (11.0 ”) 280 mm
(11.0 ”)
G E N E RAL S PE C I FI CATI O N S
/
SYSTE M M O D E L No.
S220A
HSS DIRECTED AUDIO SOUND SYSTEM
