Yaesu FT-767GX, Operating Manual

Page: 33 / 40

4. 1 4 Tips for CW Operation
A l l o f t h e t i p s fo r S S B o p e r a tio n a p p l y
equally to CW reception, with a few important
additions.
Fo r a u to m a tic t r a n s mit/receive
switching, the VOX must be switched on.
When t u ni ng a round the b a n ds, wid e r I F s e l ­
ectivity (NAR s wi t c h o f f ) a l lows you to h e a r
m o r e sig n a l s a t one ti m e, o f t e n m a king t u ning
easi er. How e v e r, when you fin d a s t a tio n you
wish to lis t en to (or c a l l ) , press t h e NAR
switch, to cut out nearby sig n a l s and d e c r e ase
noise. To avoid loosing the desired sig n a l
you m u s t t u n e s o t h a t t he pi tch o f his sig n a l
is n e a r t h e c e n t e r o f the p a s s b a n d, which you
set with the P I T C H selector. To check it, set
t he OR I VE co n t ro l to mini m u m ( to a void
c r e a ting Q R M ) , and c lose t h e key. Tune the
receiver so t h a t t h e pi tch o f the d e sired sig ­
nal matches the sidetone (if you want to zero­
beat ) . Then press the NAR switch.
A f ter s e l e c t i ng the n a r ro w IF fi l t e r, you can
a l so activ a t e t h e A P F, fo r ex t r a - n a r ro w b and
s e l e c tivi t y ( t he r e is li t t l e poi n t usi ng the
APF without the NAR switch on ) . This is most
practic a l if yo u h ave fi rst preset the A PF
frequency to the sidetone:
( I ) Press the MARK button on the rear panel
to a c ti v a t e the m a rker gene r a tor, a n d
press FUL L BK-IN to activate QSK.
( 2 ) Set the DR IVE control to minimum, and
s q u e e z e t h e keyer paddles. T u n e t h e
recei v e r fo r a heterodyne o f t h e s a m e
pitch o n the nearest 25 kHz marker.
( 3 ) Turn on the APF, and adjust the control
fo r p e ak on the h e t e rodyn e : now no t e
the p r ecis e s e t ting o f the A P F co n t ro l .
(
4 )
Turn off the APF and MARK switches, and
advance the DR IVE control.
No w, w h e n ever yo u tune a sig n a l to t h e s a m e
pi t c h a s yo u r s i d e t o n e, j u s t hi t t h e A P F
swi t c h - o n l y s l ig h t adjus t m e n t o f t h e A P F
control m ay b e needed.
You can c h ange your P I T C H s e l e c t io n a t any
t i m e : it do es no t affect your o p e r a t i ng fre ­
quency.
How e v e r, the A P F w i l l h a v e to be
reset fo r the d i f f erent p i tch.
A G C s e l e c tio n is a bit more c ritic a l wh e n r e ­
ceivi ng C W, and depends on the co de spee d :
s e l e c t t h e s e t ting t h a t provides t h e s m oo t h e s t
soundi ng co de.
Handling interference on CW is similar to SSB:
both S H I FT and NOT C H are even more effective -
the NOT C H fi l t er can be used to suppr e s s C W
signa l s on n e a rby freque ncies.
I f using the i n t e r n a l e l e c t ronic keyer, adj u s t
t h e KEYER speed co n t ro l whi l e s q u e e z i ng t h e
keyer p a d d l e s (generati ng
· - · - · -
)
.
M a k e sure
the DR IVE control is at minimum ( counterclock­
wise ) when you do this.
I f you send very fast CW with FULL BK - IN on,
the receiver m ay not have time to recover be­
tween code elements, and your transmit ted code
e l e m e n t s m ay be fo resho r t ened. T r y s e m i
break-in ( with only VOX on ) .
- 3 1 -