Yaesu FT-950, Руководство по эксплуатации, Страница: 54 / 132

Page 52 FT-950 O
PERATING
M
ANUAL
D
IGITAL
NOTCH F
ILTER
(
DNF
)
O
PERATION
The Digital NOTCH Filter (DNF) is an effective beat-canceling filter that can null out a number of interfering beat notes
inside the receiver passband. Because this is an Auto-Notch feature, there is no adjustment knob associated with this filter.
A
DVICE
:
If a very strong interfering carrier is encountered, we recommend you first use the IF NOTCH filter, as it is the most
effective notching tool in the receiver section.
1. Press the [
MENU
] button to enter the Menu mode.
2. Rotate the [ SELECT
] knob to select Menu item “
071 071
071 071 071
RGEN DNF RGEN DNF
RGEN DNF RGEN DNF
RGEN DNF
”.
A
DVICE
:
Press the [ SELECT
] knob to toggle the Menu item
display between “
071 RGEN 071 RGEN
071 RGEN 071 RGEN
071 RGEN
” and “
DNF DNF
DNF DNF
DNF
”.
3. Rotate the [
CLAR/VFO-B
] knob to select “
ON ON ON ON ON
”. The
“ ” icon will appear in the display.
4. Press and hold in the [ MENU
] button for one second
to save the new setting and exit to normal operation.
To disable the Digital NOTCH Filter, just repeat the above
procedure, rotating the [
CLAR/VFO-B
] knob to select
“
OFF OFF OFF OFF OFF
” in step 3 above. The “ ” icon will turn off, con-
firming that the Digital NOTCH Filter is not active.
A
DVICE
:
The Digital NOTCH Filter selection will be memorized
independently on each VFO stack of VFO-A and VFO-B.
D
IGITAL
N
OISE
R
EDUCTION
(
DNR
)
O
PERATION
The Digital Noise Reduction (DNR) system is designed to reduce the level of random noise found on the HF and 50 MHz
bands, and it is especially effective during SSB operation. By setting the Menu item “
072 RGEN DNR 072 RGEN DNR 072 RGEN DNR 072 RGEN DNR 072 RGEN DNR
”, any of 15 different
noise-reduction algorithms can be selected; each of these algorithms was created for dealing with a different noise profile,
and you will want to experiment with the DNR system to find the best setting according to the noise currently being
experienced.
1. Press the [
MENU
] button to enter the Menu mode.
2. Rotate the [ SELECT
] knob to select Menu item “
072 072 072 072 072
RGEN DNR RGEN DNR
RGEN DNR RGEN DNR
RGEN DNR
”.
A
DVICE
:
Press the [ SELECT
] knob momentarily to toggle the
Menu item display between “
072 RGEN 072 RGEN
072 RGEN 072 RGEN
072 RGEN
” and “
DNR DNR
DNR DNR
DNR
”.
3. Rotate the [
CLAR/VFO-B
] knob to select the setting
that most effectively reduces the noise level. The “ ”
icon will appear in the display.
4. Press and hold in the [
MENU
] button for one second
to save the new setting and exit to normal operation.
To disable the DNR system, just repeat the above proce-
dure, rotating the [
CLAR/VFO-B
] knob to select “
OFF OFF OFF OFF OFF
”
in step 3 above. The “ ” icon will turn off, confirming
that the DNR system is not active.
A
DVICE
:
The Digital Noise Reduction will be memorized indepen-
dently on each VFO stack of VFO-A and VFO-B.
[CLAR/VFO-B] Knob [MENU] Button
[SELECT] Knob
[CLAR/VFO-B] Knob [MENU] Button
[SELECT] Knob
I
NTERFERENCE
R
EJECTION