Fc-20 Automatic Antenna Tuner Operation - Yaesu FT-100D Operating Manual

FC-20 Automatic Antenna Tuner Operation
The optional FC-20 Automatic Antenna Tuner provides automatic tuning of a coaxial line
so as to present a nominal50n impedance to the FT-IOO's HF!50 MHz antenna port.
Before operation can begin, you must instruct the FT -1
~O's
microprocessor that the FC-20
is being used. This is done using the MENU:
CD Press and hold in the [FUNC] key for
Y:z
second to activate the MENU mode.
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Rotate the SELECT knob to recall MENU #61 (TUNER/ATAS).
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The default setting for this MENU item is "off." Rotate the MAIN DIAL to change
the setting to "tunEr."
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Press the [FUNC] key momentarily to save the new setting and exit to normal op-
eration.
~
Tum the FT-IOO's power Off, then On again, to re-initialize the FT-lOO's micropro-
cessor regarding the tuner status (no other setting will be affected).
Operation is similar to the procedure for the ATAS-I 00:
I. Press the [FUNC] key, as needed, to recall Operating Function Row 7 [MTR, TUN,
PRO, VOX].
2. Press the [B](TUN) key for
Y:z
second to tum the FC-20 on. The "TUN" icon
will appear on the display.
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II. i 3. Press and hold in the [B](TUN) key to initiate automatic tuning. The FT-IOO
i
l ..
.ii1
transmitter will be activated, a carrier signal will be sent out, and the coils
"TUNING"
and capacitors in the FC-20 will be selected/adjusted for optimum SWR.
ICON
When tuning is complete, the transmission will cease, and you will be ready for opera-
tion on this frequency.
tt ' ' "
Tuning data will be stored in the Fe-20's Memory system. See the discussion
~
belowfior details on how this works.
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..
66 FT-JOO
MICRO MOBILE OPERATING MANUAL