Operation; Opera Ting Controls; Front Panel - Kenwood TS-440S Instruction Manual

3. OPERATION

3-1 . OPERA TING CONTROLS

3- 1- 1

. Front panel

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CD
POWER switch
Press to turn t h e power O N or O F F .
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Meter
D u ri n g r e c e i v e t h e m e t e r is u s e d as an S -mete r . D u r­
i n g tra n s m i t t h e f u n c t i o n of t h e m e t e r is c o n t r olle d by
the M eter s w i t c h (2 � , a n d p rovid e s e it h e r ALC le vel,
PWR ( p o w e r ) or S W R r e a d ings.
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MODE/KEY (Numeric Keypad)
These keys a re used to select the desired m ode of oper­
ation (U SB, LSB, CW, A M , F M , AFS K ) . When progra m ­
m i n g a memory c h a n n e l or d i rectly entering a frequency
these keys a re used as a n u m e r i c keypad t o enter the
c h a n n e l n u m be r o r fre q u e n c y .
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Indicators
AT TUNE: L i g hts w h e n t h e AT TU N E s w i t c h is O N .
T u r n s itse l f O F F w h e n t h e a nte n n a t u n e r
h a s com pl eted t u n i n g .
NOTCH: L ig hts w h e n the N OTC H s w i t c h is O N .
F. LOCK: L i g hts w he n t h e F . L O C K s w i t c h i s O N .
1
MHz: L i g hts w h e n the 1 M H z step sw itch i s O N .
M.SCR:
L i g hts w h e n t h e M . I N s w it c h i s pressed .
When the m e mo ry scro l l function is active
you can review the contents of the
m e m ory c h a n n e l s w it h o ut a break i n the
reception o f the station you are l i sten i n g
t o .
ON AIR: L i g hts d u r i n g tra n s m it .
6
40 60
SCAN
,-, ,, CJ o ei '
l _ I. l_I.
Ci. C1.
lMHz
HF TRANSCEIVER = =
SCAN CLEAR
IN ENT
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Frequency display
T h e operat i n g freq u e n c y i s d i s pla yed d o w n to t h e
n e a rest 1 00 H z . A l s o displa ys t h e m e m ory c h a n n el
n u m be r , R IT /X IT fre q u e ncy; and i n cludes i n d i c ators for
m e m o r y , VFO A /B , sca n , s plit and R IT/X IT o p e ratio n s .
@ FUNCTION
switches
The s w i t c h e s i n clu d e d in t h i s g r o u p are t h e R IT /X I T ,
T-F S ET s w i tc h , a n d t h e V F O select swit c h e s . ( S e e
p a g e 1 5 . )
(J) MIC
gain control
M i c ro p h o n e g a i n c a n be adjusted d u ring U S B , L S B ,
A F S K a n d A M operatio n s . G a i n is i n c reased t h r u clock­
w ise rot a t i o n of this c o n t rol.
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CAR (Carrier level) control
T h i s control sets t h e c a rr i e r level d u r i n g C W , F M a n d
A M operat i o n s . W h e n t r a n s m i tt i n g i n t h e C W m o d e ,
adjust so that the A L C m e t e r pointer i s wit h i n the A L C
z o n e .
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SQL (Squelch) control
T h i s f u n c t i o n operates i n a l l m o d e s , F M , U S B , L S B ,
C W , A F S K , a n d A M .
This control i s used t o e l i m i n ate atmospheric noise, and
receiver stat i c n o i s e d u r i n g no s i g n a l period s . S lo w l y
rotate the control c l o c k w ise to t h e p o i n t w h e re the a m ­
b i e n t n o i s e j u st d i s a pe a r s , a n d s p e a k e r s h u t s off . This
point is known as the squelch t h reshold poin t . Now you
w i l l only hear output from the speaker when a n i n com­
ming s i g n a l i s prese n t . F o r weak signal re c e p t i o n t h i s
control s h o u l d be fu l l y c o u nterc l o c k w ise .
A Vf 0
f111
B SPtll XIT
: _ =- , ' .
, c, ' , _ c, ' .
/ _ /. f:! o ' -' .
_
I_ .
-
- C
M SCR LOCK NOTCH .
= f = =
��
UD �
T h e s q uelc h t hres h old position w ill v a r y from m o d e to
m o d e , so y o u m a y h a v e to readjust when you c h a n g e
m o d e s .
@ NOTCH
control
The N OTC H fun ction is used to reduce or eliminate het­
e rodyn e , or CW type s i g n a ls . The N OTC H filter will not
be effective a g a i n st S S B , A M o r F M type sig n a l s . To
use the contro l , place the NOTC H switch O N and slow­
ly rotate the N O TC H control to red uce the interfe rence .
Norm ally t h e notch point will o c c u r between t h e 1 1 : 00
a n d 1 : 00 o ' clo c k pos ition .
1 . The N OTC H freq u e n c y c a n be va ried wit h i n a range
of a p prox i m a t e l y 400 to 2 600 H z .
2 . W h e n a n inte rfe r i n g sig n al s u c h a s a C W station
a p p e a r s , slowly rotate the N OTC H c o n t ro l . If you
rotate the knob too q u ic kly you m a y pass rig ht over
t h e notch poin t . S low rotation w ill yie ld t h e best
results .
I nterfering
Interfering R eceive
signal attenuated
signal by
NOTCH control
\i
Audio output
Audio output
!NOTC H OFF) !NOTC H ON)
N O TC H control
(jJ)
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M2
w
(jJ) IF SHIFT
control
The IF S H I F T c o n t rol d o e s n ot f u n c t i o n i n t h e A M or
FM m o d e s .
T h e IF S H I F T c o n t r o l a l l o w s y o u to s h ift t h e IF p a s s ­
band of the receiver w ithout c h a n g i n g the a c t u a l center
f r e q u e n c y of the re c e i v e r . T h i s control i s u sefu l w h e n
there is i nte rference near you r center frequency. A s t h e
a c c o m p a n y i n g i llustrat i o n s h o w s rotat i n g t h i s control
m a y p l a c e t h e i nte rfe r i n g s i g n a l o u t s i d e the receiver
p a s s ba n d , a l lo w i n g for easier copy. The operation of
t h is control i n t h e U S B , LSB, A FS K , a n d C W m o d e s
i s deta i le d b e l o w .
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US B mode
Interfere n c e from l o w e r frequen c ies c a n be reduced
o r eli m i n at e d by rot a t i n g t h e I F S H I F T control i n the
G)
d i rection . T h i s w i l l cause t h e resulting audio fre­
q u e n c i e s t o h a v e a s l i g ht l y t re b l e response, i . e . low
cut f i l t e r ( l o w fre q u e n c ies atte n u ated ) . I nterference
from higher fre q u e n c i e s c a n be red uced o r e l i m i n at­
ea by rotat i n g the I F S H I F T c o ntrol in the
t i o n . T h i s will c a u s e t h e resu l t i n g audio freq u e n c i e s
R eceive
signal
to s o u n d a l ittle b a s s y , i . e . h i g h cut f i l t e r ( h i g h f r e ­
q u e n c i e s att e n u a te d ) .
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LSB/A F S K mode
I nte rfe rence from lower fre q u e n c ies c a n be reduced
or e l i m i n ated by rotat i n g t h e I F S H IFT control i n the
G)
d i rection . Th i s will cause the resu lti n g audio fre­
q u e n c i e s to sou n d a l ittle ba ssy, j u st the o p posite
of t h e effect i n the USB m o d e . I n t e rfe rence from
h i g h e r freq u e n c i e s can be reduced o r e l i m i n ated by
8
d i rec­
•.