Kenwood TS590SG User Manual

41

Press and hold [IF FIL] to momentarily display each 
setting value of the DSP fi lter band as follows:

 

SSB/ SSB-DATA, AM/ FM mode:  
High cut Frequency > Low cut Frequency

 

CW/ SSB/ SSB-DATA mode:  
Shift Frequency > Bandwidth
FSK mode:  Bandwidth only

■

 

In SSB and SSB-DATA modes, you can switch the 
Hi/Low cut operation and the Width/Shift operation.

1   Press [MENU], then press [Q-M.IN]/ [Q-MR] or 

turn the MULTI/CH control to select Menu No. 
28 (SSB) or 29 (SSB-DATA).

2   Press [M.IN]/ [SCAN (SG.SEL)] to select the 

fi lter control type  HI/LO (1) or WIDTH/SHIFT 
(2).

The Auto Notch fi lter automatically locates and 
attenuates any single interfering tone within the 
receive pass band.  This function operates digitally 
at the IF fi lter level, hence it can affect your S-meter 
reading and may also affect (slightly attenuate) your 
desired signal.  However, controlling the AGC level by 
notching out the strong interfering beat signals could 
bring up the desired SSB signal that is covered by the 
interfering beat signal.  If the interfering tone is weak, 
you may fi nd that Beat Cancel eliminates them more 
effectively.

Before

Interfering

tones

After

Receive pass band

Desired

signal

Press and hold [BC (A.NOTCH)] to toggle the Auto 
Notch Filter ON and OFF.

•    “

” appears when this function is ON.

•   The interfering beat signals are notched out.

■

 

If the interfering beat signals change the tone 
frequency randomly, you can adjust the Auto Notch 
tracking speed.

1   Press [MENU], then press [Q-M.IN]/ [Q-MR] or 

turn the MULTI/CH control to select Menu No. 30.

2   Press [M.IN]/ [SCAN (SG.SEL)] to select the 

level from FIX (0), and 1 to 4.

•  Level 1 is the slowest beat tone tracking 

speed and Level 4 is the fastest. FIX 
terminates the beat tone tracking. Adjust 
this parameter manually to remove the beat 
signal if necessary.

3   Press [MENU] to exit Menu mode.

Use manual notch when you want to vary the width of 
the notch while verifying the interfering signal.

1   Press [NOTCH (WIDE)] to toggle the Manual 

Notch Filter ON and OFF.

•    “

” appears when this function is ON.

2 Turn 

the 

NOTCH control to adjust to the point 

where beat noise just disappears.

■

 

Press and hold [NOTCH (WIDE)] to toggle the 
Notch fi lter bandwidth between NORMAL and 
WIDE.

•   “

” appears when the Notch fi lter 

bandwidth is set to WIDE.

Two types of Beat Cancel DSP fi lters are available.  
Beat Cancel 1 (BC1) is effective for removing a weak 
beat or continuous beat signals.  Beat Cancel 2 (BC2) 
is effective for removing intermittent beat signals, such 
as CW signals.

Before

Interfering

tones

After

Filter pass band (AF)

Desired

signal

Press [BC (A.NOTCH)] to cycle through Beat Cancel 
1, Beat Cancel 2, and OFF.

•  “

” or “

” appears when the Beat Cancel 

function is ON.

•  The interfering beat signals are removed.

This transceiver provides 2 types of Noise Reduction 
functions (NR1 and NR2) for reducing random noise 
which interferes with the desired signal.

NR1 differs, depending on the reception mode.  
When receiving a voice call in SSB/ FM/ AM mode, 
noise reduction uses a spectrum subtraction system.  
When receiving a non-voice call in CW/ FSK mode, 
noise reduction uses a LMS adaptive fi lter which 
emphasizes the periodic signal.

NR2 uses a SPAC format, which extracts a periodic 
signal from within the received signal.

Press [NR (LEV)] to cycle between NR1, NR2, and 
OFF.

• “

” or “

” appears, depending on which 

noise reduction fi lter is selected.