Yaesu FT-450D User's Manual | Page 10

Yaesu Radio User's Manual - FT-450D.
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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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