1-*
i.
*
r
=+
-Drm.s.qsloras
r
-
Directional Coupler
1KW
1' 1-l
:1
3.5-150
MHz
50 ohm
RF Power
SWR
so-239
SWR Meter
POWER
Meter
120SM)
xsCr,H)
x
65(I-r)rm-
450g.
*
St Swan
\y
ELEcTRoN
tcS
A
subsidiaty
ot
Cubic corpoiatian
305 Airport
Road,
Oceanside,
California
92054 U.S,A,
INSTRUCTION
MANUALS
*
Model
SWR-I
SWR
POWER METER
*
Model
SWR-1 is SWR &
POWER
Meter
with Directional
Coupler installed
and its
character is
to measure
the
wide
frequency
range
precisely
by very easy
operation.
For SWR measurement,
it uses
Directional Coupler,
co-
mparing the
power
supplied
to and reflected from antenna
and the independent
SWR meter
indicates
the measurem-
ent.
For
power
measur:ement, the
power
meter indicates
the travelling wave
power
detr:cted
by Directional
Cou-
pler
and its frequency range is
determined by the
flgure
of
Variable
Resistor which
is for
sensitivity adjustment,
Model SWR-1 is
a. through
line
power
meter
in its
construction,
so RF'
amount
is not
directly detected
from
co-ar iine.
Accordingly, there is
very iittle loss connecting it-between
transmitter
and antenna
circuit and
QSO
is avai14!1e
as
it,is
connected.
SPECIFICATIONS
Measuring method.
Maximum
handling
power
"
S\,VR
indication
iirequency
R.ange
Circuit
Impedance
Measuring
Accuracy
.-
Connecter
Meter
Sensitivity
+209(t
+
50,4
100pA
F.S.D.
100pA
F'.S.D.
Weight
OPERATION
*Connection
of
Model
SWR-1
1.
Turn
off the
outpuu
power
of transmitter.
Disconnect
the co-ax
cable
which leads
to airtenna from transmitter.
').
Connect the
antenna
terminal of transmitter
and
the
"XMTR" connecter of Model SWR-1 with
50
ohm
co
-
ax cable. This
c,t-ax cable is
preferably
short, and
shoul<i be less than I meter
long.
3. Connect the co-ax cable which
leads
to
the antenna to the
"ANT"
connecter
of Model SWR-1
.
When
any
antdnna tuner is
set between
transmitter
and
antenna,
connect
Modei
SWR
--1
between
transmitter
and antenna
_
tuner.
In this
case, Any type
of feeder is
acceptable
between antenna
tuner
and antenna,
+
SW'R Measurement
x
1. Turn transmitter cn, under
the condition
that Model SWR-1
is correctly connected.
2. POWER Meter
and SWR Meter
swing
at the
same
lime.
Adjust the center
knob so
thattheieftside POWER
Meter indicates
"100.,i50".
This
position
is
"SET."
You can now read SWR
f,gure on the right
side
SWR
Meter
directly.
3. The indication
of SWR Meter
shows the ratio of the travelling
wave
power
from transmitter and the reflect-
ed wave
power
from antenna
circuit,
so the higher initlcation
of
SWR
Meter,
the larger reflected
wave
power.
The reflected
wave
power
is not
delivered
to antenna and it is
more
preferable
that
its
power
is
less. If S\
fR
Meter indicates
less
than
1.3, the condition
is
good.
The
table
below- shows the ratio of the travelling
wave
power
and the
reflected
wave
power
against the
SIVR figure.
.*'
|
*qryIl"-IL
ll_.-rt
W(RFF)/W(IrOR)%
,.;l;*
-h,*-r.oo
r.z
I
o.t,
2.0 ] 11.1
r.3 t.zl
]]
,r l
,r.n
1.4
I
2.78
li e.
o
Zr.
o
4. In case
of Antenna tuner is
set between Model
SWR
figure
as small as
possible.
SWR-1
and antenna, adjust Antenna
Coupler to make
rf:t.
L,'"i.}i
i'
ib:'
F
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