Yaesu FT-950, Руководство по эксплуатации, Страница: 33 / 132

Page 31 FT-950 O
PERATING
M
ANUAL
8. Press the appropriate [ MODE
] button to select the de-
sired operating mode.
Pressing the [
SSB
] button toggles the
LSB and USB mode, and also pressing the
[
AM/FM
] button toggles the AM and FM
mode.
A
DVICE
:
ˆ By convention in the Amateur bands, LSB is used
on the 7 MHz and lower bands (with the exception
of 60 meters), while USB is utilized on the 14 MHz
and higher bands.
ˆ When changing modes from SSB to CW, you will
observe a frequency shift on the display. This shift
represents the BFO offset between the “zero beat”
frequency and the audible CW pitch (tone) you can
hear (the pitch is programmed via the Menu item
“
045 A1A PITCH 045 A1A PITCH
045 A1A PITCH 045 A1A PITCH 045 A1A PITCH
”), even though the actual tone
that you hear is not changing. If you do not want
this frequency shift to appear when changing modes
from (for example) USB to CW, use the Menu item
“
047 A1A FRQDISP 047 A1A FRQDISP 047 A1A FRQDISP 047 A1A FRQDISP 047 A1A FRQDISP
”, described on page 112.
ˆ When operating on the FM mode, rotate the [ SQL
]
(Squelch) knob clockwise to the point where the
background noise is just silenced. This is the point
of maximum sensitivity to weak signals. Excessive
advancement of the [
SQL
] knob will degrade the
ability of the receiver to detect weak signals.
9. Rotate the Main Tuning Dial knob to tune around the
band, and begin normal operation.
B
ASIC
O
PERATION
:
R
ECEIVING ON
A
MATEUR
B
ANDS
A
DVICE
:
ˆ Clockwise rotation of the Main Tuning Dial knob
increases the operating frequency, one “step” of the
synthesizer at a time; similarly, counter-clockwise
rotation of the Main Tuning Dial knob will decrease
the frequency. Two settings, one “normal” and one
“fast”, are available on each operating mode. Press-
ing the [
FAST
] button engages the “Fast” tuning
selection, see chart below.
ˆ It is possible to set the frequency change over one
dial rotation, separately for the CW mode, using
the Menu items “
084 TUN DIALSTP 084 TUN DIALSTP 084 TUN DIALSTP 084 TUN DIALSTP 084 TUN DIALSTP
” and “
085 085 085 085 085
TUN CW FINE TUN CW FINE TUN CW FINE TUN CW FINE TUN CW FINE
”. See page 116.
ˆ If you want to navigate rapidly, so as to effect rapid
frequency change, there are several techniques
available:
y Direct keyboard entry of the frequency (see page
39).
y Use the [ CLAR/VFO-B
] knob to tune in 1 MHz
steps (see page 39).
y
Use the microphone’s [
UP
]/[
DWN
] scanning
keys, if your microphone is so equipped (see
page 39).
M
AIN
T
UNING
D
IAL
K
NOB
T
UNING
R
ATE
O
PERATING
M
ODE
1
STEP
1
DIAL ROTATION
N
ORMAL
[
F
AST
]
N
ORMAL
[
F
AST
]
LSB/USB/CW/AM/ 10 Hz 10 kHz
RTTY/PKT(LSB)
[100 Hz] [100 kHz]
FM/PKT(FM) 100 Hz [1 kHz] 100 kHz [1 MHz]
[ ] : [
FAST
] switch set to “ON”