YAESU HF/50 mHz Transceiver FT-450 User’s Manual
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BAND
RANGE
AMATEUR RADIO BAND
18 MHz
30 KHz ~ 33 MHz
18.068 MHz ~ 18.168 MHz
21 MHz
30 KHz ~ 33 MHz
21 MHz ~21.45 MHz
24 MHz
30 KHz ~ 33 MHz
24.89 MHz ~ 24.99 MHz
28 MHz
30 KHz ~ 33 MHz
28 MHz ~ 29.7 MHz
50 MHz
33 MHz ~ 56 MHz
50 MHz ~ 54 MHz
Table 3 – Transceiver Bands
3.3
VFO (Variable Frequency Oscillator)
The display shows the current frequency in 10 Hz increments (left field is MHz, mid
field is KHz). The desired frequency is selected by rotating the “DSP/SEL” knob (24
steps per revolution). Tabke 5 shows the incremental step size. Factory defaults are
highlighted.
Press the “DSP/SEL” knob to blink the left 3 digits of
the frequency display and the “DSP/SEL” knob now
moves in 100 kHz increments changing only those
digits. Pressing the “DSP/SEL” knob again (or pressing
any button or moving the “MAIN” dial) stops the
blinking and the “DSP/SEL” knob action returns to the
smaller increment size.
The “MAIN” (large unlabeled) dial (100 steps per
revolution) allows fine-tuning of the frequency. The
“MAIN” dial is, by default, disabled in AM or FM
modes, but may be enabled by adaptation.
MODE(S)
“DSP/SEL” KNOB
“MAIN” DIAL
CW, LSB, USB, DATA
1.0, 2.5, 5.0 kHz
1, 10, 20 Hz
AM
2.5, 5.0, 9.0, 10, 12.5, 25 kHz
100, 200 Hz *
FM
5.0, 6.25,10, 12,.5, 15, 20, 25, 50 kHz
100, 200 Hz *
Table 5 – Base frequency step size for controls
*Note: By default, “MAIN” dial is inoperative for AM and FM modes unless enabled by adaptation.
To change the frequency step size of the “DSP/SEL” knob, f-press the “STEP/SPLIT” (just above “F
■
”).
The current step size will show on the bottom right of the display. Change the step size value by rotating
the “DSP/SEL” knob. When the correct value is displayed, press the “STEP/SPLIT” button to exit that
state.
Press the “FAST” button (to the left bottom of “MAIN” dial) to increase the speed of frequency selection.
The word FAST will be highlighted on the display, the “DSP/SEL” increments will be doubled and the
“MAIN” dial increments will be increased by a factor of 10. Pressing “FAST” again to extinguish the
FAST highlight and returns both knobs to their set increments.
The current frequency may be locked to avoid inadvertently changing it. To toggle the lock function,
press the “LOCK” button to the right of the “MAIN” dial. When locked, the word LOCK will appear