INTERFERENCE REJECTION(SIGNALS WITHIN 3KHZ)

NARROW (NAR) ONE-TOUCHIF FILTER SELECTION

Main band (VFO-A) “One-Touch Narrow” Operation

Pressing the [NAR] button provides one-touch, mode-specific selection of a narrow IF DSP filter set-

ting that does not depend on the setting of the [WIDTH] knob. Pressing the [NAR] button once more returns the bandwidth control to the Width/Shift system. The factory default bandwidths are:

OPERATING MODE

[NAR] SWITCH

 

“ON”

“OFF”

SSB

1.8 kHz

￿

CW

500 Hz

￿

RTTY/PKT-L/PKT-U

300 Hz

￿

PKT-FM

9 kHz

16 kHz

AM

6 kHz

9 kHz

FM (28/50 MHz Bands)

9 kHz

16 kHz

￿: Depends on the [WIDTH] knob

ADVICE:

￿When the narrow bandwidth is selected, the “” icon will appear in the display and the bandwidth on the WIDTH indicator in the display will be reduced.

￿The bandwidth applied when the [NAR] button is pressed may be adjusted using the Menu. This allows you to customize a quick-switch “Narrow” bandwidth matching your operating needs. The default values for each mode below are underlined.

SSB mode: Menu item “104 rdsP SSB NAR”

200/400/600/850/1100/1350/1500/1650/ 1800/1950/2100/2250 Hz

CW mode: Menu item “095 rdsP CW NARR”

25/50/100/200/300/400/500/800/1200/1400/ 1700/2000 Hz

PSK mode: Menu item “098 rdsP PSK NAR”

25/50/100/200/300/400 Hz

RTTY mode: Menu item “101 rdsP RTY NAR”

25/50/100/200/300/400 Hz

￿When the [NAR] button has been pushed so as to en- gage the narrow filter, the [WIDTH] knob will be dis- abled, but IF Shift still is operational. For many appli- cations, you may find that simple adjustment of the [WIDTH] knob, instead of engaging the Narrow filter, may be satisfactory for interference reduction.

￿You may adjust the CW bandwidth using the [WIDTH] knob, even if the narrow filter is engaged. In this case, available bandwidth selections are 25 Hz ~ 2 kHz.

￿When you press the [NAR] button in the FM mode, both the transmit and receive bandwidths are narrowed.

NOTE:

When the [NAR] button is pressed, the [WIDTH] knob no longer functions (except the CW mode).

WIDTH Indicator

[WIDTH] Knob

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[NAR] Button

Sub band (VFO-B)

“One-Touch Narrow” Operation

1.Press the [B] button.

2.Within five seconds of pressing the [B] button (while the imbedded orange LED is blinking), press the [NAR] button to toggle the bandwidth between “wide” and “narrow.” When the narrow bandwidth is selected, the “” icon will appear in the display.

[B] Button

[NAR] Button

OPERATING MODE

[NAR] SWITCH

 

“ON”

“OFF”

SSB

1.1 kHz

2.25 kHz

CW

1.2 kHz

2.0 kHz

 

(300 Hz/500 Hz)￿

 

RTTY/PKT-L/PKT-U

1.2 kHz

1.2 kHz

PKT-FM

9 kHz

16 kHz

AM

6 kHz

9 kHz

FM (28/50 MHz bands)

9 kHz

16 kHz

￿: Requires the optional CW Narrow Filter

300Hz: YF-122CN, 500 Hz: YF-122C

Page 60

FT-2000 OPERATING MANUAL