DSP Notes Reduction System  (210-0543)   Operation      Faxback Doc. # 6411

SELECTING THE FILTER

Set FILTER to the type of filter needed for your system.

  Select NR to reduce static or hiss from audio signals.

  Select SSB to reject adjacent signals that might be higher or lower in
  tone and tune your receiver for the best SSB audio quality.

  Select CW to block out noise above and below the desired tone when you
  receive Morse code signals.  Tune your receiver to match the DSP's
  passband and maximize audio output.

SELECTING THE BANDWIDTH

Set BANDWIDTH to select a narrow, medium, or wide bandwidth for the
receiving, filter.  Begin with the wide setting, then adjust towards the
narrow setting until undesired sounds are reduced.

USING THE SYSTEM

1.  Turn on the system by turning VOLUME clockwise until you hear it
    click.  The red POWER indicator lights.

2.  Locate the desired signal.

3.  Press DSP in.

4.  Increase the input signal, with your receiver's volume control, until
    the green DSP indicator flickers when the system receives an incoming
    signal.

Notes:

  The DSP indicator reflects the input level only when you select the NR
  or SSB filter.  If the indicator lights steadily when there is an
  incoming audio signal, the signal is too high and might cause excessive
  distortion.  If this happens, readjust the input signal by reducing the
  receiver's volume.

  When you select CW, the DSP indicator lights steadily whether or not it
  receives an incoming signal.

5.  Adjust VOLUME to a comfortable listening level.

(LB/smc-04/27/94)