DSP Noise Reduction System  (210-0543)   Preparation    Faxback Doc. # 6409

CONNECTING THE SYSTEM TO POWER

You can power the system from a 12-volt DC, negative ground power source.

For Mobile Use

Follow these steps to connect the system to power in a automobile, boat,
or other vehicle.

1.  Connect the supplied power cord's red (positive) lead to a terminal
    inside the vehicle's fuse box that has power when you turn the
    ignition key to the ACC (accessory) or ON position.

2.  Connect the cord's black (negative) lead to ground, such as a bolt
    attached to the vehicle's chassis.

Note:  Do not connect the black lead to a part of the vehicle that is
       insulated from the chassis by a plastic part.  Doing so prevents
       a proper ground.

3.  Connect the supplied power cord's barrel plug to the DC 12V jack on
    the system's back panel.

For Home Use

You can power the system from a standard AC outlet.  Using AC power
requires an adapter (not supplied), such as Cat. No. 273-1653.

Caution:  You must use an adapter that supplies at least 12 volts and
          delivers at least 500 milliamps.  Its center tip must be set
          to positive, and its plug must correctly fit the DC 12V jack.
          The recommended adapter meets these specifications.  Using an
          adapter that does not meet these specifications could
          seriously damage the system or the adapter.

Follow these steps to use AC power.

1.  Insert the adapter's barrel plug into the system's AC 12V jack.

2.  Plug the adapter into a standard AC outlet.

CONNECTING THE AUDIO COMPONENT

To connect the audio component (a CB radio, for example) to the system,
plug one end of the supplied audio patch cable into the component's 1/8-
inch audio output jack.  Then plug the cord's other end into system's
AUDIO INPUT jack on the back panel.

CONNECTING HEADPHONES

To connect headphones (not supplied), plug the headphones' 1/4-inch plug
into the headphones jack on the front panel.  Your local Radio Shack
store sells a variety of headphones, such as Cat. No. 20-210.

Listening Safety

To protect your hearing, follow these guidelines when you use headphones.

  Do not listen at extremely high volume levels.  Extended high-volume
  listening can lead to permanent hearing loss.

  Set the volume to the lowest level possible before you begin listening.
  Put on the headphones, then gradually increase the volume as necessary.

  Once you set the volume, do not increase it.  Over a period of time,
  your ears adapt to the volume level, so a volume level that does not
  cause discomfort might still damage your hearing.

Traffic Safety

Do not wear headphones while operating a motor vehicle.  Even through
some headphones are designed to let you hear some outside sounds when
listening at normal volume levels, they still present a traffic hazard
and are illegal in some areas.

CONNECTING AN EXTERNAL SPEAKER

To connect an external speaker (not supplied), connect the speaker
cable's 1/8-inch plug into the EXT SP jack on the system's back panel.
Your local Radio Shack store sells a variety of speaker systems, such as
Cat. No. 21-549.

(LB/smc-04/27/94)