Operation
38
Digital filter AFF
This machine has built-in digital audio filter, which can realize narrow band filter function and enhance signal identification.
Operation method:
1
、
Short press[
MENU
] button, rotate the main knob and switch to the page 9 in menu;
2
、
Select
[AFF]
to turn on the digital filter function. At this point, the
[HPF]
and
[LPF]
functionality options are displayed;
3
、
[
HPF
] is a high-pass filter option, and [
LPF
]is a low-pass filter option. Select any filter and rotate the main knob to adjust the filter parameters. The
two groups of filters can be collocated to form an ultra-narrow band filter, which can significantly improve the hearing sensitivity and identification
degree of the signal.
4
、
Press
[AFF]
function button again to turn off the digital filter function.
5
、
When you open the digital filter, the firmware default setting parameters are as follows:
SSB mode: HPF is 300Hz,LPF is 2200Hz.
CW mode: HPF is 500Hz,LPF is 900Hz.
You can adjust the filter parameters according to your listening preferences to get the best sense of hearing.
