Initial Check; Receiver Operation - Yaesu FT-480R Instruction Manual

OPERATION
The all solid-state design of the FT-480R means
that tuning procedures are very simple. The follow-
ing paragraphs will describe the tuning procedures
for receiver and transmitter operation.
INITIAL CHECK
Before connecting the transceiver to the power
supply, be certain that a fuse of the proper rating
is in use, and that a 50 ohm antenna has been
connected to the antenna jack.
FREQUENCY SELECTION USING MAIN DIAL
When the transceiver is initially turned on, the
digital display will read the preset frequency
147.000.0 MHz, and frequency control will be via
the main tuning dial. After memory, scanning, or
priority operation, pressing the DIL button will
return control to the main dial. Rotate the dial to
secure the operating frequency desired. Since tun-
ing steps depend on the combination of the MODE
switch and STEP switch as shown in Table 1, use
the synthesizer step for easy tuning. When the
upper or lower bandedge is reached the next
synthesizer step will automatically be to the
opposite bandedge. Thus, after 148.499.9 MHz,
the next step is 143.500.0 MHz. While transmit-
ting, the operation frequency can not be changed
in any operation modes except the satellite mode.
RECEIVER OPERATION
Preset the controls and switches as follows:
MODE .......... Desired mode
SOE sata: Fully counterclockwise
STEP. ay tite hyenas Desired synthesizer step
VFO A/B TXA...VFO*'A" position
SCAN? sod naked. MAN position
All other switches should initially be turned off.
Rotate the VOL control clockwise to turn the
transceiver on and adjust for a comfortable level.
(1) SSB mode
Using the main tuning dial, tune in an SSB signal.
The STEP switch should be set to M or F position
so that you can secure the operating frequency
desired ir 100 Hz or | kHz steps. When you get
close to the desired frequency, set the STEP switch
to S position for 10 Hz step in order to tune in the
signal clearly. When pulse type noise such as
ignition noise is encountered, press the NB (noise
blanker) switch.
(2) CW mode
With the clarifier off, tune in a CW signal. When
the incoming signal is tuned to a beat note of
800 Hz, your transmit frequency will coincide with
that of the other station. If another beat note is
desired, or if the other station drifts, then use the
clarifier function.
(3) FM mode
Using the main tuning control, tune in an FM
signal for a maximum and steady S-meter reading
and a clear, natural voice output from the speaker.
Set the STEP switch to the M (20 kHz) position,
as almost all FM stations use 20 kHz steps. When
you change the operating mode from SSB/CW to
FM, you may clear the display and operating
frequency to the next lowest 20 kHz step by
pressing the F STEP button. All the digits of the
operating frequency below 10 kHz will be set to
zero by pressing the F.SET button.
When the channel is clear, rotate the SQL control
to the point where the background noise is just
silenced. Do not rotate the SQL control much
beyond this threshold point, or else the receiver
will not respond to weak signals. The BUSY/MOD
lamp will light up when the squelch circuit is
opened. If the S-meter wobbles, or if it is impos-
sible to obtain clear audio, it is possible that the
incoming signal is on another mode such as SSB.
TRANSMITTER
Before transmission, be certain that the frequency
on which you are going to operate is clear to
prevent interruption of the other station's opera-
tion. It is important that an antenna or dummy
load be connected to the antenna jack at all times.
(1) SSB mode
Set the MODE switch to SSB and close the micro-
phone PTT switeh, the ON ATR lamp should light