FCC ID: K66FT-857
Operating Manual
Vertex Standard Co., Ltd.
45
External Wattmeters
If you wish to use an external wattmeter in conjunction with the transceiver and your ATAS-100/-120, please check the
wattmeter with an Ohmmeter prior to installation. Be sure there is a direct connection between the “In” and “Out” jacks of
the wattmeter (zero resistance), and also ensure that there is a completely open circuit between the center pin and shield of
the wattmeter’s output jack. Some wattmeters use a coil or other device which shorts the center pin to ground at DC, and
this type of internal wattmeter circuitry will not allow the tuning function of the ATAS-100/-120 to operate.
Operation on 30/17/12 Meters
Although the ATAS-100/-120 is not specified for operation on the above bands, and optimum operation is therefore not
guaranteed, the ATAS-100/-120 generally can be tuned successfully on these bands (some manual adjustment may be
required). Operation of the ATAS-100/-120 on these bands will not damage the antenna’s components; please feel free to
experiment on these bands, if you like.
FC-30 Automatic Antenna Tuner Operation
The optional FC-30 Automatic Antenna Tuner provides automatic tuning of a coaxial line so as to present a nominal 50
Ω
impedance to the FT-857’s HF/50 MHz antenna port.
Before operation can begin, you must instruct the FT-857’s microprocessor that the FC-30 is being used. This is done
using the Menu Mode:
1. Press and hold in the [F] key for one second to activate the Menu mode.
2. Rotate the MEM/VFO CH knob to recall Menu Mode No-020 [CAT/LIN/TUN]. The default setting for this Menu is
“CAT.” Rotate the DIAL to change the setting to “TUNER.”
3. Rotate the MEM/VFO CH knob to recall Menu Mode No-085 [TUNER/ATAS]. The default setting for this Menu is
“OFF.” Rotate the DIAL to change the setting to “TUNER.”
4. Press and hold in the [F] key for one second to save the new setting and exit.
Operation is similar to the procedure for the ATAS-100/-120:
1. Press the [F] key, as needed, to recall Multi Function Row “k” [TUNE, DOWN, UP].
2. Press the [A](TUNE) key to turn the FC-30 on. “Parentheses” will appear on both sides of the “TUNE” indication,
and the “TUNE” will appear on the LCD.
3. Press and hold in the [A](TUNE) key to initiate automatic tuning. The FT-857 transmitter will be activated, a carrier
signal will be sent out, and the coils and capacitors in the FC-30 will be selected/adjusted for optimum SWR. When
tuning is complete, the transmission will cease, and you will be ready for operation on this frequency.
Tuning data will be stored in the FC-30’s Memory system. See the discussion below for details on how this works.
