ICOM IC-7000 说明手册
D
Plot measurement
92
6
FUNCTIONS FOR TRANSMIT
6
The IC-7000 has a built-in circuit for measuring an-
tenna SWR—no external equipment or special adjust-
ments are necessary.
tenna SWR—no external equipment or special adjust-
ments are necessary.
The IC-7000 can measure SWR in 2 ways—spot mea-
surement and plot measurement.
surement and plot measurement.
q Select CW or RTTY operation with
[MODE]
.
w Confirm that the output power is over 30 W.
e Select S
e Select S
S--1
1.
r Push
[F-3
M
ME
ET
T
]
one or more times to select the
SWR meter.
t Key down or push
[PTT]
to transmit; then read the
actual SWR from the meter.
➠≤ 1.5 well matched antenna
➠> 1.5 check antenna or cable connection, etc.
[MENU/GRP]
[F-3]
The best match is in this range.
SWR
1
1.5
2
-
3
∞
Plot measurement allows you to measure the SWR
over an entire band.
over an entire band.
q Confirm that the output power is over 30 W.
w Set the center frequency for the SWR to be mea-
w Set the center frequency for the SWR to be mea-
sured.
e Select G
G--3
3
(SWR meter).
r Push and hold
[F-4
S
ST
TE
EP
P
]
for 1 sec. one or more
times to select the desired measuring step from 10,
50, 100 and 500 kHz.
50, 100 and 500 kHz.
t Push
[F-2]
or
[F-3]
one or more times to select the
desired number of measuring steps from 3, 5, 7, 9,
11, and 13 steps.
11, and 13 steps.
y Push
[F-1]
to start the measuring.
u Push and hold
[PTT]
on the microphone to mea-
sure the SWR.
• Frequency marker, “∫,” appears below SWR graph.
• RTTY mode is automatically selected.
• RTTY mode is automatically selected.
i When releasing
[PTT]
, the frequency marker and
frequency indication move to the next frequency to
be measured.
be measured.
o Repeat steps u and i to measure SWR over the
entire frequency range.
!0 When the measured SWR is less than 1.5:1, the
antenna is well matched with the transceiver in the
measured frequency range.
measured frequency range.
Push [F-1] to start
mesuring.
mesuring.
Push [F-2] or [F-3] to select number of
SWR mesuring steps.
SWR mesuring steps.
Frequency marker appears and moves
after measurement.
after measurement.
Push [F-4] to Select
SWR mesuring steps.
SWR mesuring steps.
• Measuring (after pushing [F1])
The antenna is well matched in this range
1.0 : 1
1.5 : 1
2.0 : 1
3.0 : 1
4.0 : 1
■
Measuring SWR
D
Spot measurement
Menu selection (Example: S-1)
• Push
[MENU/GRP]
for 1 sec. once or twice to select
the menu group S
S.
Selection from:
M
M
,
S
S
or
G
G
(Graphic)
• Push
[MENU/GRP]
momentarily one or more times to
select the menu S
S--1
1.
Selection from:
S
S
--
1
1
,
S
S
--
2
2
or
S
S
--
3
3