In order to select the filter's type, it is necessary to have the filter's GAIN=0.0dB, then using the
“PM2” encoder, rotate it “clockwise” in order to decide the Bell filter's Bandwidth, or
“counter-clockwise” to select the Shelving filter type (Low or High) and its order (1st or 2nd).
So, in order to define the filter type for the filter number 1 (“x”=1), it is necessary from the above
screen, to enter the filter's editing page pressing the ENTER button, and the screen has to appear
as follows:
In this case, the filter's GAIN=0.0dB, and being BW=1.05, the current filter selected is a Bell type.
Now, rotating the “PM2” encoder clockwise, the parameter BW will range from 0.05 up to 3 for
identifying a bandwidth value for a Bell filter.
If a Bell filter is selected, then the Gain can be modified from 0.0dB and the BW will range between
0.05 and 3.
If the user wants to select a Shelving filter from the above setting, with the GAIN=0.0dB [if the
GAIN is not 0.0dB, it is necessary to set it at 0.0dB using the “PM3” encoder], rotate the “PM2”
Counter-clockwise. Once BW reaches the 0.05 value, at the next step of the “PM2”
counter-clockwise rotation, the selection of the Shelving filters will be entered.
Still rotating the “PM2” counter-clockwise, the Shelving filters and their order will be selectable in
the following sequence:
1. 1st order Low Shelving = -6LoSh [on the screen]
2. 2nd order Low Shelving = -12LoSh [on the screen]
3. 1st order High Shelving = -6HiSh [on the screen]
4. 2nd order High Shelving = -12HiSh [on the screen]
Once the desired Shelving filter is selected, the “PM3” can then be used to select the desired GAIN
and when the GAIN is set at a value different from 0.0dB, then the filter type cannot be changed
until this GAIN is returned to 0.0dB.
BELL Filter:
As an example, if we want to set a bell filter within EQ-1, then the BW has to be set at
a desired value of say 1.00 using the “PM2” encoder, the GAIN at say +3dB using the “PM3”
encoder and the center Frequency at say 1.00KHz with the “NAV/PM1” encoder.
The EQ sub-menu screen will show the following:
Out-1 Name EQ-1
-> 1.00KHz BW1.05 0.0dB
Out-1 Name EQ-1
->1.00kHz BW=1.00 + 3.0dB
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