Page 73
FT-450 O
PERATION
M
ANUAL
P
ACKET
O
PERATION
Packet operation is easily accomplished on the
FT-450
by connecting your TNC (Terminal Node Controller) to
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-
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.
2. When the “transmit” command is received from
the TNC, the transmitter of the
FT-450
will auto-
matically 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.
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.
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
”.
Q
UICK
P
OINT
:
DATA Jack Specifications
DATA IN
Input Level: 60 mVp-p
Input Impedance: 600 Ohms
DATA OUT
Fixed level, does not respond to setting of
[
AF GAIN
] or [
SQL/RF GAIN
] knob.
Output Level: 500 mVp-p
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.
