YAESU HF/50 mHz Transceiver FT-450 User’s Manual
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addition, if CW mode, the display also shows whether the injected beat frequency is LSB or
USB.
When the automatic antenna tuner is engaged, the TUNER indicator is lighted. As long as the
system is receiving (or squelch is open) the BUSY indicator is lighted.
4.1
Transmission
When the system is transmitting, the TX is lighted and the BUSY is not lighted. If an attempt is
made to transmit outside of the amateur radio bands, the status area of the display (lower right
hand corner will show TX ERR and the TX indicator will not be lighted.
4.1.1 Microphone Button
The system will transmit whenever the side button on the microphone is pressed.
4.1.2 Voice Activated Transmitter Switching (VOX)
F-press the “VOX/STO” button to toggle the VOX (voice-actuated transmitter switching) system on or
off when in USB, LSB, AM, or FM modes. When the VOX is active, the VOX indicator will
show on the display. When VOX is active, speaking into the microphone will cause the
Transceiver to transmit. (Note: MH-67 microphone not operative when button released)
4.1.3 CW Break-In
F-press the “VOX/STO” button to toggle the break-in (key-actuated transmitter switching)
system on or off when in CW mode. When the break-in is active, theBK-IN indicator will
show on the display. Break-in should be on for CW transmission. Turning off break-in is
useful for code practice.
4.1.4 Data
An external computer or device may command the transceiver to transmit rtty, packet, or other data.
4.2
Meter
During transmission, one of the three
parameters is monitored (only one of
PO, ALC, or SWR titles will show on
the display). The parameters may be
stepped through by pressing the
“METER/DIM III” button just above the “AF GAIN” knob. They are PO (Power Out),
ALC (Automatic Level Control), and SWR (Standing Wave Ratio) respectively.