Yaesu FT-450D 用户手册
Page 75
FT-450D O
PERATION
M
ANUAL
P
ACKET
O
PERATION
Packet operation is easily accomplished on the FT-450D by connecting your TNC (Terminal Node Controller) to
the transceiver, per the illustration.
the transceiver, per the illustration.
P
ACKET
S
ETUP
(I
NCLUDING
S
UBCARRIER
F
REQUENCY
)
Before operation can commence, change Menu Item
“D TYPE” setting to “USER-L” (for LSB-Based Packet
Operation) or “USER-U” (for USB-Based Packet Op-
“D TYPE” setting to “USER-L” (for LSB-Based Packet
Operation) or “USER-U” (for USB-Based Packet Op-
B
ASIC
S
ETUP
1. Press the [MODE
]/[MODE] buttons several
times to indicate both the “
” and “
” icons
(for LSB-Based Packet) or the “
” and “
”
icons (for USB-Based Packet) on the display. En-
gage the Packet operation.
gage the Packet operation.
2. When the “transmit” command is received from
the TNC, the transmitter of the FT-450D will au-
tomatically be engaged. Likewise, the command
to return to receive will cause the radio to revert
to the receive mode.
tomatically be engaged. Likewise, the command
to return to receive will cause the radio to revert
to the receive mode.
A
DVICE
:
There is no adjustment of the DATA input level
and DATA output level of the DATA jack on the
rear panel; please make any needed level ad-
justments at the TU side.
rear panel; please make any needed level ad-
justments at the TU side.
During Packet operation via the rear panel’s DATA
jack, the front panel MIC jack is cut off, so you
won’t have a “live microphone” problem during
data operation.
won’t have a “live microphone” problem during
data operation.
N
OTE
:
If you anticipate making data transmissions of longer
than a few minutes, we recommend that you reduce
the transmitter power to 1/2 ~ 1/3 of its normal maxi-
mum via Menu Item “RFPOWER”.
than a few minutes, we recommend that you reduce
the transmitter power to 1/2 ~ 1/3 of its normal maxi-
mum via Menu Item “RFPOWER”.
Q
UICK
P
OINT
:
DATA Jack Specifications
DATA IN
DATA IN
Input Level: 60 mVp-p
Input Impedance: 600 Ohms
Input Impedance: 600 Ohms
DATA OUT
Fixed level, does not respond to setting of
[AF GAIN] or [SQL/RF GAIN] knob.
[AF GAIN] or [SQL/RF GAIN] knob.
Output Level: 500 mVp-p
Output Impedance: 600 Ohms
Output Impedance: 600 Ohms
DATA
OUT
PTT
DATA
IN
D
AT
A
IN
D
AT
A
O
U
T
D
AT
A
P
TT
G
N
D
INPUT
DC 13.8V
22A
ANT
GND
EXT
SPKR
CAT
LINEAR
TUNER
DATA
TNC
DATA OUT
GND
PACKET PTT
N.C.
DATA IN
(SQL Control).
DATA JACK
DATA IN (Pin 1)
Pin 6
GND (Pin 2)
DATA PTT (Pin 3)
FSK IN (Pin 4)
DATA OUT (Pin 5)
SQL OUT(
)
eration), to configure your radio for the data mode to
be used.
be used.