Yaesu FT DX 9000MP CONTEST - DATA MANAGEMENT OPERATION, Руководство по эксплуатации

Страница: 117 / 180

Page 115 FT
DX
9000MP O
PERATION
M
ANUAL
CW P
ITCH
A
DJUSTMENT
Rotation of the front panel’s [ CW PITCH
] control will
allow adjustment of the center frequency of the receiver
passband, as well as the pitch of your offset CW carrier, to
the tone you prefer. The tone may be varied between 300
Hz and 1050 Hz, in 50 Hz steps.
A A
A A A
D D D D DVICE VICE VICE VICE VICE
The Sub band (VFO-B) frequency display will
show the spot tone frequency for 3 seconds when-
ever the [
PITCH
] knob is turned.
You may disable this feature (displaying the spot
tone frequency) via Menu item “ DISPLAY 022
LEVEL INDICATOR .” See page 148 for details.
CW C CW C
CW C CW C
CW C
ONVENIENCE ONVENIENCE
ONVENIENCE ONVENIENCE ONVENIENCE
F F F F F
EA EA
EA EA EATURES
TURES
TURES TURES TURES
T T
T T
T
ERMINOL ERMINOL ERMINOL ERMINOL ERMINOLOGY OGY OGY OGY OGY
CW Pitch: If you tuned to an exact “zero beat” on
an incoming CW signal, you could not copy it
(“Zero beat” implies a 0 Hz tone). Therefore, the
receiver is offset several hundreds of Hz (typically),
so as to allow your ear to detect the tone. The BFO
offset associated with this tuning (that produces the
comfortable audio tone) is called the CW Pitch.
[BK-IN/SPOT] Switch
VDD TEMP SWR BIAS
CW W
AVE
S
HAPE
The rise and fall times of the CW envelope may be adjusted using the Menu. The default setting of 4 ms. is
ideal for most operation, as it produces a nicely “rounded” shape to the CW character. However, the rise
and fall times may be adjusted to 1/2/4/6 ms, as desired, using Menu item “
MODE-CW 055 CW WAVE
SHAPE ”. We generally do not recommend adjustment of this parameter, but if you are using a linear ampli-
fier that is causing some sharpenng of the CW character, you may wish to try the 6 ms setting. Too fast a
rise/fall time can produce “hard” keying that borders on the creation of key clicks.