Yaesu FT-227RB Instruction Manual page 12

MEMORY OPERATION
Select the channel desired with the main dial or
scanner controls. Set the FUNCTION switch to
M1 (SIMP), and press the M (Memory) switch.
Now the frequency on the dial is memorized, and
both TX and RX will occur on the memorized
frequency. For instant recall to the memorized
frequency, press MR (Memory Recall). In like
fashion, another frequency may be memorized
for simplex operation, by setting the FUNCTION
switch to M2 (SIMP), and pressing the M button.
Rotation of the FUNCTION switch to positions
Ml—M3 (600 kHz RPT) automatically shifts the
transmit frequency 600 kHz down from the memo-
rized frequency. For example, if you memorize
146.940 MHz in the M1 (SIMP) position, you will
be operating transceive on that frequency. Now,
rotate the FUNCTION switch to M1 (600 kHz
RPT). You will be transmitting on 146.340 MHz,
while receiving on 146.940 MHz. By pressing the
+TX button, you will be transmitting 600 kHz
above the receiving frequency, i.e. 147.540 MHz.
The M4 position may be used for split frequency
operation, with a split of up to 4 MHz possible.
Rotate the main dial or scan to the desired trans-
mit frequency, and press the M button. Now rotate
the dial or scan to the desired receive frequency.
You will transmit on the memory frequency, while
receiving on the dial frequency. The position of
the MR button is not important in the case of
the MR position of the FUNCTION switch.
REPEATER OPERATION
A frequency shift of 600 kHz will be applied to
the dial frequency when the FUNCTION switch
is placed in the 600 kHz RPT position.
When the FUNCTION switch is set to positions
Ml—M3 (600 kHz RPT), and the MR switch is not
pushed, automatic split of —600 kHz will be
applied to the dial frequency. With the FUNCTION
switch set to Ml—M3 (600 kHz RPT), and the MR
switch pushed, the —600 kHz split will be applied
to the memorized frequency.
When operating in the repeater mode, the repeater
shift may be made +600 kHz, by pressing the +TX
button.
Be careful not to transmit outside the amateur
band when using the repeater shift feature.
Remember: placing the FUNCTION switch in the
Ml—M2 (SIMP) position will provide simplex
operation.
When the BURST switch on the bottom of the
transceiver is placed in the ON position, a tone of
1800 Hz of approximately 1 second duration will
be superimposed on the speech signal. This tone is
normally used only with "tone access" repeaters,
and the BURST switch should be turned OFF
when using repeaters not requiring this access tone.
OPTIONAL TONE SQUELCH OPERATION
The tone squelch option allows silent monitoring
of busy channels. When the tone squelch unit is
installed, and the TONE SQ button pushed, a sub-
audible tone will be superimposed on the transmit-
ted signal. On receive, the squelch will not open
unless a subaudible tone is superimposed on the
transmitted signal of the other station. The tone
frequency can be set to any frequency between
70 and 250 Hz, as shown in the Alignment section
of this manual.
To install the tone squelch option, remove the
transceiver from its case. Locate the space provided
for the tone squelch circuit board, and align the
board so that it fits down over the pins, as shown.
Solder the connections shown, and remove the red
jumper wire shown in the illustration.
With the tone squelch option installed, the BUSY
lamp will light up when any signal is received, but
the squelch will open only when a subaudible tone
is received on an incoming signal. The operator
should check the BUSY lamp before transmitting,
out of courtesy to other operators who may be
using the channel. The tone squelch system is
designed to allow silent monitoring of busy chan-
nels; it is not designed to allow two operators -so
equipped to have priority use of a channel.