Transmitter Operation: General; Swr Measuring & Ant. Matching - Yaesu FT-767GX Operating Manual

4.
7 Transmitter Operation:
A t this poi n t y o u a r e p r o b ab l y r e a d y t o t r y
out the t r a n s mi t t e r.
mit ting frequencies below 30 MHz are only the
500 kHz
frequency segm ents that include a m a ­
( § 1.1),
t eur b a n d s
u sing a n a n t e n n a d e sig n e d f o r t h e b a n d s on
which you wish to operate.
Do not t r ansm i t without a proper antenna
( see § 3. 4 for antenna information ) .
7. 1
4. S W R Me asu r i n g
T o obt ain a n accurate SWR readi ng
Not e :
and t o s e t t h e a u t o m a tic a n t e n n a
you m u s t t r a n s mi t a s t e a dy c a r ri e r a t f u l l
p o w e r o n t h e ai r.
t h a t t h e f r e q u e n c y i s n o t i n u s e b y o t h e r
s t a ti o n s b e f o r e t u ning u p.
fi r s t wi t h a s h o r t t r a n s m i s s i o n i f t h e
freq u e n c y is i n u s e , a n d t h e n lis t e n c a r e ­
f u l l y f o r a t l e a s t
keying t h e t r an s mi t t e r fo r SWR m e a s u ri ng
or a n t e n n a t u ni ng.
Keying the Transmit ter
I f you do not have
c o nn e c t e d t o t h e KEY j a ck o n t h e r e a r p a n e l ,
use the C W mode for SWR m easuring and ant enna
t uning, and use the MOX button ( above t he M I C
j a ck ) t o k e y t h e t r a n s mi t t e r d u ri ng t h e s e p r o ­
cedures. I f you have a key or paddles connec­
ted, m ake sure the KEYER switch at the right
side of t h e f r o n t p a n e l i s O F F ( o u t ) .
s ti l l u s e t h e C W m o d e , b u t c l o s e t h e k e y ( o r
s q u e e z e t h e p a d d l e s )
wi t h t h e VOX s wi t c h o n, i n s t e a d o f using t h e
MOX swit ch.
I f you h a v e an ex t e r n a l e l e c t r o ni c k e y e r c o n ­
n e c t e d t o t h e K EY j a ck,
e q ui p p e d wi t h a ' t u n e ' f u n c ti o n t o s h o r t t h e
keying line, use t h e FM m ode a n d t h e MOX but ­
t o n t o k e y t h e t r a n s mi t t e r.
h o w e v e r, b e c a r e f u l
noises i n the microphone when transmitting,
t h a t c ou l d c au s e s e v e r e i n t e r f e r e n c e t o o t h e r
s t ati o n s o n ne a rb y f r e q u e n cies.
Determine now how you wil l key the tran s mitter
d u ring the fo l l owing
s t ati o n s e t u p .
General
R e c a l l t h a t v a li d t r a n s ­
a n d t h a t y o u s h ou l d
&
An tenna M a t c h i n g
t u n e r
P l e a s e m a k e c e r t ai n
A l w a y s a s k
1 5 s e c o n d s b e f o r e
a k e y o r k e y e r p a d d l es
Y o u
t o k e y t h e t r a n s mi t t e r
a n d i f i t i s
I n t hi s c a se,
n o t t o s p e ak o r m a k e
p r o c e d u r e s, wi t h y o u r
SWR
(1 )
P r e s e t t he DR I V E con t r o l ( o u t e r k n ob ,
l e f t m o s t c o n t ro l ) fu l l y c l o c k wise.
( 2 ) M a k e s u r e t h e f r e q u e n cy i s c l e a r
n o t , r e t u n e t o a n e a r b y f r e q u e n cy a n d
c h e c k ag ain ) .
b e
Press the D I G I T A L SWR button near the
( 3 )
u p p e r r ig h t
( ' SWR ' wi l l a p p e a r a t t h e rig h t sid e o f
t h e di s p l ay ) .
( 4 ) Select the tune - u p mode ( CW or
d e t e r m i n e d
T r a n s mi t t e r ' ) .
( 5 ) Key t h e t r a n s mi t t e r , w ai t o n e s e c o n d ,
a n d n o t e t h e ( digi t a l )
o n t h e dis p l ay.
mi t t e r ( r e t u r n t o r e c eiv e ) .
I f the SWR was below 1.5,
SWR s wi t ch agai n to r e t u r n to f r e q u e n c y dis ­
p l a y : a n t e n n a t u ning i s n o t ne c e s s a ry.
I f t h e SWR w a s a b o v e 1. 5 ,
a n t e n n a t u n e r t o r e m a t ch t he a n t e n n a i f y o u r
o p e r a ti ng f r e q u e n c y i s b e l o w 3 0 M H z .
V H F or UHF,
s e l f .
Antenna Mat ching
T h e i n t e r n a l au t o m a ti c a n t e n n a t u n e r c a n b e
used t o m atch your ant enna t o t h e transmitter
i n the a m a t e u r b a n d s b e l o w 30 M H z .
particular antenna has been m atched on a band
and y o u s e l e c t an o t h e r b a n d,
tings a r e a u t o m a ti c a l l y s t o r e d i n m e m o r y ,
b e r ec a l l ed a u t o m a ti c a l l y w h e n e v e r t h a t b a n d
i s r e s e l e c t e d.
t he a n t e n n a t u n e r m e m o ri e s a r e s e t fo r a 50-
ohm l o a d o n a l l b a n d s .
n o t
an tenna a t any time as described nex t ( the new
s e t ti ngs wi l l o v e r w ri t e t h e o l d o n e s ) .
A f t e r y o u h a v e s e t t h e t u n e r f o r y o u r a n t e n n a
a n d f a v o ri t e o p e r a ti ng f r e q u e n ci e s,
as
r a r e l y n e e d t o r e s e t i t - y o u r s e t tings wi l l
b e r e c a l l e d a u t o m a ti c a l l y.
u s e a di f fe r e n t a n t e n n a, d o n ' t f o r g e t t o r e s e t
t h e t u n e r.
- 2 1 -
c o r n e r o f t h e
a b o v e, u n d e r ' Keying
SWR i n di c a ti o n
T h e n u n k e y t h e t r a n s ­
press the D I G I TAL
you c a n u s e t h e
you must readjust t h e an tenna it­
t h e t u n e r s e t ­
B e f o r e l e a ving t h e
You can re m a t c h t h e
H o w e ver,
( i f
di s p l a y
FM, as
t h e
I f o n
O n c e a
t o
f a c t o r y ,
y o u wi l l
i f y o u