Digital (DSP) Filters
The G90/S has a built-in variable digital filter that can con�nuously adjust the
bandwidth of the receiver’s input to improve recep�on of the desired signal.
The G90/S has two filter adjustment modes: center frequency point mode and
bandwidth mode.
1. Press the [Mul�-func�on] knob momentarily to switch between the two
filter modes.
2. When the center frequency point mode is selected: The prompt text "Cxxx"
appears over the filter icon ("xxx" refers to the center frequency
point value) and a green ver�cal line displays on the orange trapezoidal
shape.
3. When the bandwidth mode is selected: The prompt text "Bxxx" appears
over the filter icon ("xxx" refers to the bandwidth value) and a green
ver�cal line displays on the both sides of orange trapezoid.
4. When either the center frequency point mode or the bandwidth mode is
selected, rota�ng the [Mul�-func�on] knob adjusts the values.
How to adjust the low and high cut-off frequencies of the filter:
Press the [FUNC] bu�on momentarily to enable the opera�on of alternate
bu�on func�ons.
Either press the [CMP/F-L] or [NB/F-H] bu�on and rotate the main tuning
knob to adjust the lower or upper cut-off frequencies of the filter. Press the
[CMP/F-L] or [NB/F-H] bu�on again momentarily to display the currently set
bandwidth values in the func�on display area of the screen. 200/2750 is a
good star�ng point for SSB opera�on.
F-L: Adjust the low-end cutoff frequency of the filter
F-H: Adjust the high-end cutoff frequency of the filter
1.
2.
Method to reset to the default filter parameters:
Press the [FUNC] bu�on momentarily to enable the opera�on of the
alternate bu�on func�ons.
Long press the [CMP/F-L] or [NB/F-H] bu�on to reset the upper or lower
cutoff frequencies of the filter to their default values.
1.
2.
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