Yaesu FT-712RH Operating Manual page 33

To record your callsign:
(1) Turn on the radio, and press VOICE to activate the DVS-I.
(2) Press the TONE button, if necessary, so that "M" is displayed at the left (to
select Microphone recording).
(3) Note the number (1 - 4) displayed just to the right of the "M", signifying the bit
rate. You will want to experiment with all four possible bit rates (as detailed
below), but for now, let's start with the fastest rate, number 1. If another number
is displayed, press the REV button, turn to tuning knob until 1 is displayed next
to the "M", and press REV again.
(4) Rotate the tuning knob to select Segmentation Code 1 in the center of the
display. Notice that a "I" also appears in the Starting Phrase display position
(Code 1 always starts with Segment 1).
(5) There should not be any "L"s on the display, since you don't want to lock out
your callsign. If you see an "L" at the right, press the MHz button, repeatedly if
necessary, to clear all "L"s.
(6) Put your finger near the UP button on the microphone, and hold it near your
mouth. Now watch the elapsed recording time indication on the S-meter, press
the UP button and speak your callsign, then either press UP again to stop
recording, or just wait until the Smeter reaches full scale (and recording stops
automatically).
Unless you have a very short callsign, or spoke quickly, you probably didn't have
time to fit it all in between the two beeps that signalled the start of recording and the
beep at the end. Anyway, to check your results, just press the DWN button on the
microphone (and adjust the volume, if necessary).
If you were very close, you might want to just press the UP button main and re-
record, speaking a little faster. Otherwise (or just for fun), change the bit rate to 2
(press REV, turn the tuning knob one click clockwise, and press REV again) and try
again. Notice you have twice the recording time (the S-meter advances more slowly
during recording).
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