Yaesu FT-450D User's Manual | Page 10
Page 8
FT-450D OPERATION MANUAL
REAR PANEL JACKS
INPUT
DC 13.8V
22A
ANT
GND
EXT
SPKR
CAT
LINEAR
TUNER
DATA
DC IN Jack
This is the DC power supply
connection for the transceiver.
Use the supplied DC cable to
connect directly to the car bat-
tery or to a DC power supply,
which must be capable of sup-
plying at least 22 A @13.8
VDC.
ANT Jack
Connect your antenna here, using a type-M (PL-259) co-
axial connector and 50 Ohm coaxial feedline.
Warning!: High Power RF voltage is present at the TX RF
section of the transceiver while transmitting. Absolutely!
Do not touch the TX RF section while transmitting.
DATA Jack
This 6-pin input/output jack provides receiver audio and squelch sig-
nals, and accepts transmit (AFSK) audio and PTT control, from an
external packet TNC.
LINEAR Jack
This 10-pin output jack pro-
vides band selection data,
which may be used for control
of the optional VL-1000 Solid-
State Linear Amplifier.
CAT Jack
This 9-pin serial DB-9 jack allows ex-
ternal computer control of the FT-
450D. Connect a (straight) serial
cable here and to the RS-232C COM
port on your personal computer (no
external interface is required).
EXT SPKR Jack
This 3.5-mm, 2-pin jack provides variable audio output for an external
speaker. The audio output impedance at this jack is 4 - 16 Ohms and
the level varies according to the setting of the front panel’s [AF GAIN]
knob. Inserting a plug into this jack disables the internal loudspeaker.
GND Terminal
For safety and optimum performance, use this termi-
nal to connect the transceiver to a good earth ground.
Use a large diameter, short braided cable for making
ground connections. Refer to page 12 for other notes
about proper grounding.
SQL OUT
FSK IN
GND
DATA IN
DATA PTT
DATA OUT
TXD
TX GND OUT
+13.8V OUT
GND
TUNER SENSE
TX INH IN
RXD
RESET OUT
BAND DATA-A (LSB)
TX GND OUT
+13.8V OUT
TXREG IN
GND
BAND DATA-B
BAND DATA-C
BAND DATA-D (MSB)
TX INH IN
EXT ALC IN
CTS
RTS
GND
SERIAL IN
SERIAL OUT
Connect to
Connect to
N/A
Connect to
TUNER Jack
This 8-pin jack is used for Connection to
the FC-40 External Automatic Antenna
Tuner.
COOLING FAN
Turns at low speed in receive mode.
Turns at high speed when the temperature begins to
rise or in transmit mode.
(viewed from rear panel)
(viewed from rear panel)
(viewed from rear panel)
(viewed from rear panel)
(viewed from rear panel)
+
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