HSS Hire S220A Owner'S Manual & Installation Manual Download

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TERMINOLOGy/

HSS

Acronym for

HyperSonic

Sound

, American Technology Corporation’s proprietary trademark

for its directional audio sound system technology.

Emitter:

The silver, dimpled surface behind the front protective screen is the face surface of the HSS emitter.

This component is what emits the ultrasonic sound waves into the air.

SPL:

Sound Pressure Level, a term indicating the volume (loudness) of the audio program material in the air.

Beam Width:

The effective width (size) of the audio sound beam as it is projected into the air.

Direct Mode:

When the listener is in the direct audio beam of sound.

Virtual Mode:

When the listener is intended to hear the sound reflected from a surface.

REVIEW OF CONTROLS/

1) VOLUME UP:

Pressing the Volume UP button raises the overall volume of the HSS unit

in 1.5 dB steps, from off - -45 dB – 0 dB (full on).

2) VOLUME DOWN:

Pressing the Volume DOWN button lowers the overall volume of the

HSS unit in 1.5 dB steps from 0dB to -45dB. Step # 32 "mutes" the output (off).

3) ACTIVE/STANDBY SWITCH:

Active/Standby is a toggle function activated by the

momentary push-button switch. Pressing the button one time will place the HSS unit into Standby

mode which will mute the audio output, pressing the button again will return the unit to active

operational mode.

4) ANALOG AUDIO INPUT:

This analog, line level, audio input connector will accept

a stereo or mono 3.5mm mini-jack. (See Audio Connection section)

5) INDICATOR LED:

The indicator LED indicates operational modes of the HSS unit:

• SOLID GREEN: The unit is on, functional, and active

• FLASHING GREEN: The unit is on and currently in standby mode (audio is muted)

• RED: The audio signal is clipping (distorting). Reduce the level of the incoming audio

signal or lower the HSS volume control.

6) CONTROL INTERFACE:

(See Connections Section) Volume Up/Down and

Active/Standby can be controlled through this remote connection

Ventilation Requirements

You must insure that the

HSS

unit receives appropriate ventilation. Do not mount near curtains

or other surfaces that might cover or partially block the ventilation of the unit. If the HSS unit
is ceiling or plenum mounted, ensure that proper ventilation requirements are observed.
Be sure that insulation or other materials do not interfere with the unit ventilation.

Electrical Power Requirements

Refer to the Specifications section at the end of the manual to determine the specific amount of
AC power required for this device. This

HSS

unit contains highly sophisticated digital circuitry

which can be damaged by noisy AC power or extreme degrees of voltage fluctuation. Use care
to provide properly filtered and controlled AC
power to the

HSS

unit. Use care to provide the

same type of power you would use for a computer
or TV.

Audio Connection

AUDIO INPUT: The analog audio input connector is
a 3.5mm female STEREO (tip, ring, sleeve) mini-
jack, containing two input channels. In the normal configuration, the input jack accepts a stereo sig-
nal and sums the two channels together. (For example, the Left and Right outputs of a standard
portable CD player will be summed together at the input to the HSS unit).

With the volume control setting on the HSS unit set to FULL volume, a 0.5V p-p input signal
per channel is the threshold of clipping. You may input a signal up to 2.0V p-p into each channel
without clipping if the volume control is turned down by -12dB or more. An input signal higher
than 2.0V p-p into either channel will clip the A/D converter and turning down the volume control
will not eliminate the resulting distortion. The nominal input level is approximately 1.0V p-p per
channel. This level provides the user the ability to maintain a reasonable level control over the
incoming audio material.

NOTE: This HSS unit is equipped with a safety feature that minimizes the risk of overdriving the
unit. Should the input signal be too high, or the volume set too high and the unit senses that it
may start to clip, it will automatically temporarily reduce the volume setting to a safe level.
Once clipping is no longer occurring, the original volume setting is gradually restored. This vol-
ume restoration is intentionally slow in order to offer maximum protection and to prevent the
"pumping" that sometimes occurs with other automatic level controls. Depending on condi-
tions, this gradual recovery may take up to a minute. The unit will indicate that it is reducing
volume to prevent clipping by flashing the green LED red approximately once every 5 seconds.

ALTERNATE ANALOG AUDIO INPUT CONFIGURATIONS

Two alternate input configurations are supported without any modifications to the

HSS

unit:

1) A mono signal may be input into either channel leaving the other channel open or unconnected.

As in the typical stereo case, a 0.5V p-p input yields full output at the maximum volume setting.

2) A mono signal may be input into the

HSS

unit using a 3.5mm mono male plug. In this case the

input levels are doubled: in other words, a 1.0V p-p input is required to achieve a full output and
4.0 Vp-p is the maximum input before clipping.

10 kΩ

0.1 uF