User manual

Page 5
7. Setup mode
To change the number of DSP levels or listen to the demonstration modes, it is necessary
to put the module into the setup mode.
To do this, ensure the module is switched off. Press and hold the DSP level button. Turn
on the module and a 2 tone beep will be heard indicating that the module is in the set up
mode.
Releasing the button after the first 2 tone beep will enter demonstration mode 1.
Releasing after the second 2 tone beep will enter demonstration mode 2.
Releasing after the third 2 tone beep will set the unit to level 2 in the 4 level mode.
After the fourth beep, keep the button depressed. 4 beeps will indicate 4 level mode and 8
beeps 8 levels. Release the button to select the desired level mode.
The module will return to normal operation after this. The colour of the LED will indicate
the mode of operation.
8. Noise reduction levels.
4 or 8 levels of noise reduction are available. The amount
of noise and tone reduction is shown in the table below.
Level
(4)
Level
(8)
Tone Reduction White Noise Reduction
14dB 9dB
12 5dB 11dB
3 6dB 13dB
24 8dB 15dB
516dB 17dB
3 6 21dB 20dB
7 25dB 24dB
4 8 65dB 35dB
Table 2. Tone and noise reduction levels.
The column marked level (4) shows the noise and tone reduction when operating the
module with 4 levels, and the level (8) column shows it for 8 levels.
With the DSP noise cancelling switched on (green LED), holding down the function button
will continuously change the DSP level until the desired level is reached.
Release the button. The module will retain this level until it is changed.