33
Interference Rejection
FT-891 Advance Manual
Digital Noise Reduction (DNR) Operation
The Digital Noise Reduction (DNR) system is designed to reduce the level of ambient
noise found on the HF and 50 MHz bands. The (DNR) system is especially effective
during SSB operation. While DNR is activated, rotate the
MULTI
function knob to adjust
the DNR level. Any of 15 different noise-reduction algorithms can be selected; each
of these algorithms are designed to deal with a different noise profile. You will want to
experiment with the DNR system to find the best setting to reduce the noise currently
being experienced.
1. Press the [
F
] key repeatedly, to find the
“FUNCTION-2” list screen.
2. Rotate the
MULTI
function knob to select
“DNR”.
3. Press the
MULTI
function knob, and then
rotate it to choose one of 15 algorithms that
best reduces the noise level.
4. When the adjustment is completed, press
the
MULTI
function knob.
5. Press and hold the [
F
] key for one second to exit the “FUNCTION-2” list screen and
resume normal operation.
r
To set the DNR to “OFF”:
1. Press the [
F
] key repeatedly, to find the “FUNCTION-2” list screen.
2. Rotate the
MULTI
function knob to select “DNR”, then press the
MULTI
function knob.
3. Press and hold the [
F
] key for one second to exit the “FUNCTION-2” list screen
and resume normal operation.
r
DNR function may be assigned to the [A], [B] or [C] key. Refer to “Changing the
function assigned to the [A]/[B]/[C] keys” in the FT-891 Operating Manual.
