Yaesu FT-950, Руководство по эксплуатации, Страница: 125 / 132

Page 123 FT-950 O
PERATING
M
ANUAL
I
NSTALLATION OF
O
PTIONAL
A
CCESSORIES
Setup the FT-950
The optional FC-40 Automatic Antenna Tuner provides automatic tuning of a coaxial line to present nominal 50-ohm
impedance to the FT-950 ’s ANT jack.
Before operation can begin, you must instruct the
FT-950
’s microprocessor that the
FC-40
is being used. This is done using
the Menu Mode:
FC-40 E
XTERNAL
A
UTOMATIC
A
NTENNA
T
UNER
(
FOR
W
IRE
A
NTENNA
)
[TUNE] Button
[CLAR/VFO-B] Knob [MENU] Button
[SELECT] Knob
1. Press the [
MENU
] button momentarily, to engage the
Menu mode.
2. Rotate the [ SELECT
] knob to select the Menu Item
“
110 TGEN EXT TUN 110 TGEN EXT TUN 110 TGEN EXT TUN 110 TGEN EXT TUN 110 TGEN EXT TUN
”.
A
DVICE
:
Press the [ SELECT
] knob momentarily to toggle the
Menu item display between “
110 TGEN 110 TGEN 110 TGEN 110 TGEN 110 TGEN
” and “
EXT EXT EXT EXT EXT
TUN TUN
TUN TUN TUN
”.
3. Rotate the [ CLAR/VFO-B
] knob to select “
Etu Etu Etu Etu Etu
(Ex-
ternal Tuner)”.
4. Press and hold in the [ MENU
] button for one second
to save the new setting and exit to normal operation.
Operation
1. Press the [ TUNE
] button briefly to activate the Auto-
matic Antenna Tuner.
2. The “ ” icon will appear in the display.
3. If the transceiver frequency is out of the amateur band,
the “ ” icon will not appear.
4. Press and hold the [
TUNE
] button for one second to
begin automatic tuning. The transmitter will be en-
gaged, and the “
” icon will blink while tuning
is in progress.
5. Tuning will stop automatically when a low SWR is
achieved. You may Press and hold the [ TUNE
] button
for one second while tuning is in progress, to cancel
the automatic tuning.
6. To disable the Automatic Antenna Tuner, press the
[
TUNE
] button briefly again.
N
OTE
:
ˆ Please connect a good earth ground to the GND termi-
nal of FC-40 .
ˆ The carrier signal transmits continuously while tuning
is in progress. Please monitor the operating frequency
before beginning the tuning process. Be sure you are
not interfering with others who may already be using
the frequency.
ˆ It is normal to hear the sound of the relays while tun-
ing is in progress.
ˆ If the impedance cannot be matched by the FC-40 bet-
ter than 2:1, and the “ ” icon blinks, the micro-
processor will not retain the tuning data for that fre-
quency, as the
FC-40 presumes that you will want to
adjust or repair your antenna system to correct the high
SWR condition.