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mobile aeronautics education laboratory
yaesu ft-900 operation
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the yaesu ft-900 is a high-performance transceiver providing up to 100 watts transmitter output power on all amateur radio hf bands using cw, ssb, and fm mdoes, and up to 25 watts carrier in am. the receiver tunes all frequencies between 100 khz and 30 mhz in 2.5-khz steps. the ft-900 can also be used to receive shortwave broadcasts.
operation
the following control descriptions should cover most uses of the ft-900 as a receiver in the mael.
control name function
af the audio frequency (af) control knob in the upper right corner of the panel is the volume control.
sql the squelch control is concentric with the af knob.
ssb/cw/am/fm this column of buttons selects the reception mode. the current mode is shown on the display.
ssb - single sideband (for voice transmissions in the hambands)
cw - continuous wave (morse code)
am - amplitude modulation (for listening to shortwave radio broadcasts)
fm - frequency modulation
ham/gen determines whether the ft-900 tunes only the amateur radio bands or acts as a general coverage receiver.
ham - tunes only amateur radio bands
gen - tunes from 100 khz to 30 mhz (gen highlighted on the display)
main tuning knob changes the frequency of the receiver as shown in the display.
fast this button changes the speed with which the main tuning knob changes the frequency
down/up these buttons operat two ways depending on the state of the ham/gen function.
ham - steps through the different amateur radio bands
gen - shifts the frequency down/up by either 100 khz or 1 mhz
band select the set of 10 buttons on the lower right of the panel let you tune directly to a particular amateur radio band without having to turn the main tuning knob multiple times to move up or down in frequency. the amateur radio bands are indicated by the beginning freqency in mhz: 1.8, 3.5, 7, 10, 14, 18, 21, 24.5, 28, and 29.
att this button controls an attenuator that reduces the sensitivity of the receiver. it should normally be off or out.
nb the noise blanker (nb) can be used to reduce the interference from repetitive static pulsed noise in the received signal.
s-meter the top of the meter scales indicates the signal level of the received signal in db.