Yaesu MARK-V FT-100MP, Руководство по эксплуатации, Страница: 54 / 120

Page 52
O
PERATING
M
ANUAL
If the SWR presented to the transceiver is above
3:1, the tuner will generally not complete the tuning
process (although in certain borderline cases, it may
actually be able to lower the SWR below 1.5:1). If the
pre-tuning SWR is above 3:1, the auto-tuner will
not
store the tuning settings, under the presumption that
corrective antenna work is required.
After using the antenna tuner, the “ TUNER ” indica-
tor will remain on (unless you press the [ TUNER
] but-
ton to turn it off), and the “ WAIT ” indicator will flicker
momentarily when you change frequency, indicating
that the main microprocessor is reporting the frequency
change to the tuner coprocessor (reception is unaf-
fected). If you have tuned far enough to possibly re-
quire rematching, it will reset itself to the new range (if
it has any previously stored settings for the new range).
However, when you first connect a new antenna, the
tuner will not have the correct settings stored in these
memories, so you will need to “train” the tuner, by press-
ing and holding the [
TUNER
] button for ½ second when-
ever you change to a new band or frequency range
(for this antenna).
If you want to use an external antenna tuner, the
internal ATU should be disabled. Menu selection 8-8 pro-
vides a more “fail-safe” method of doing this (as op-
posed to simply turning the [
TUNER
] switch off).
Note : The “G5RV” multiband antenna does not
present an SWR below 3:1 on all HF amateur bands,
despite its reputation as an “all-band” antenna. You will
need to perform additional impedance matching with
respect to the basic G5RV design, especially on 30,
17, and 12 meters.
SSB T
RANSMISSION
To transmit in LSB or USB mode:
r
Make sure the appropriate mode indicator is lit, and
set the meter
ALC/COMP selector to view “ ALC .”
r
If this is the first time you are transmitting SSB with
the
MARK-V FT-1000MP
Field
, preset the MIC and
RF PWR controls to about the 12 o’clock position,
and make sure the VOX is off (button out).
r
Check the “ RX ” and “ TX ” LEDs above the tuning
knobs to determine which frequency you’re going
to transmit on, and make sure “
GEN ” is not show-
ing to the left of the main frequency display.
r
To transmit, just press the PTT (push-to-talk) switch
on your microphone, and talk.
To determine the optimum setting of the MIC con-
trol for your microphone, adjust it while speaking into
the microphone (at a normal level) so that the meter
deflects to about midrange on voice peaks (the upper
end of the red ALC range). Once found, this setting
can be left as-is unless you change microphones. The
proper adjustment point for most commonly-available
amateur microphones is a setting between about 9
o’clock and 10 o’clock.
You can adjust the RF PWR control for more or
less output, from about 5 to 100 watts (on the upper
PO meter scale), as desired. However, you should al-
ways use the lowest possible power output to maintain
reliable communications - not only as a courtesy to
other stations, but to minimize the possibility of caus-
ing overload to nearby home-entertainment devices,
and to reduce heat generation and maximize the life of
the equipment.
Transmitter Monitor
The transmitter monitor is actually a separate re-
ceiver circuit which picks up a sample of your trans-
mitted RF signal, allowing you to hear accurately how
the signal sounds. This feature is very helpful for set-
ting up the speech processor controls, among other
things.
Activate the monitor by pressing the orange [ MONI
]
button (below the AF GAIN control) so that its red LED
lights, and adjust the MONI control beneath the meter
for a comfortable volume while transmitting. Audio feed-
back of your signal from the loudspeaker to the micro-
phone may occur if the
MONI control is not properly
set, you may want to use the monitor with headphones;
if so you should plug them in now.
O
PERATION
T
RANSMITTING
Important Note
Although the antenna tuning process normally is
very fast, certain difficult impedances may require
as long as 50 seconds to match. This is a normal
condition, however, related to the time required for
the variable capacitors to make a complete search
for the optimum setting with the available values of
inductance.