Operation - Yaesu FT-227RB Instruction Manual

OPERATION
INITIAL CHECK
1. Rotate the VOLUME control in a clock-
wise direction to apply power. The meter
will become illuminated, and the digital
display will indicate "7.000" initially
("5000" on models limited to 144-146
MHz). With the 5 UP button pressed, the
display will indicate "7.1 005" ("5.005").
2. Rotate the SQUELCH control fully counter-
wise.
3. Adust the VOLUME control for a normal
listening level on an incoming signal or the
background noise.
4. Rotate the main tuning dial to find a clear
channel (background noise only). Advance
the SQUELCH control clockwise until the
receiver is just silenced and the BUSY lamp
turns off. Perform this step carefully so as
not to go beyond the threshold point; if
you do, the receiver will not respond to
weak signals.
FREQUENCY SELECTION
The channel selection knob selects the operating
frequency in 10 kHz steps. Clockwise rotation of
the main dial increases the frequency up to
148.000 MHz, while counterclockwise rotation
lowers the frequency to 143.990 MHz. On
143.990 and 148.000 MHz, the transmitter is
disabled, preventing out-of-range operation.
This protection applies, as well, to memorized
frequencies, in addition to dial frequencies.
CAUTION
CHANNEL SELECTION MUST NOT BE MADE
WHILE THE PUSH-TO-TALK SWITCH IS
ACTIVATED FOR TRANSMISSION.
SCANNER OPERATION
The PLL scanner will allow remote scanning for
easy frequency change. Set the BUSY/MAN/
CLEAR switch to MAN. Now, pressing the UP
switch on the microphone for an instant will shift
the operating frequency up 10 kHz. Pressing the
DN switch will, likewise, lower the operating fre-
quency 10 kHz.
Now, press the UP switch, and hold it in the de-
pressed position. After an initial shift of 10 kHz,
and a delay of approximately 1 second, the scanner
will be activated, and the frequency will be shifted
rapidly upward until the UP or DN switch is
pressed again, at which time the scan will be
halted. When the upper band edge is reached, the
scan will reverse itself, and will begin scanning in
a lower direction.
The same relations apply when the DN switch is
pressed, except that when the lower band edge is
reached, the scanner will reverse itself and begin
scanning upward.
To set the scanner for searching for an occupied
channel, set the BUSY/MAN/CLEAR switch to
BUSY. Now, when the scanner is activated, the
scan will be halted whenever the squelch is acti-
vated by an incoming signal. If the squelch is not
adjusted to silence the receiver (with no signal
present), the scanner will advance only 10 kHz
per press, thinking that an occupied channel has
been found.
To set the scanner for searching for a clear channel,
set the BUSY/MAN/CLEAR switch to CLEAR.
Now, the scanner will halt when the squelch is
silenced (no signal present).
Whether in the BUSY, MAN, or CLEAR modes,
the scan may be halted at any time by pressing
either the UP or DN switches while scanning. If
the PTT switch is pressed while scanning, the scan
will be halted and transmission will occur on the
frequency on which the scan was halted.
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