Yaesu FT-991 Operating Manual page 19

I
nstallatIon and


(as viewed from front panel)
RTTY/DATA
 

 
(as viewed from rear panel)
DC IN
(as viewed from rear panel)
EXT SPKR, REM/ALC
SIGNAL GND
F T-991 O
peraTing
P /C
lug onneCtor
MIC
DOWN

UP

+5V

MIC GND

MIC

PTT

GND

FAST

DATA IN

GND

DAKY


SHIFT

RTYO

BUSY

Manipulator
DOT DASH COMMON
M
anual
I
nterconnectIons
P D
inout iagrams
GPS/CAT
① DCD
② SERIAL OUT/RXD
⑨ ⑧ ⑦ ⑥
（GPS DATA IN）
③ SERIAL IN
④ DTR
⑤ GND
⑥ DSR
⑤ ④ ③ ② ① ⑦ RTS
⑧ CTS
⑨ RI
(as viewed from rear panel)
TUN/LIN



 


 


 



(as viewed from rear panel)
KEY
Single key/Double-speed key
KEY
Do not use
2-conductor type plug
PHONE
SIGNAL (RIGHT)
SIGNAL (LEFT) GND
+13V OUT
TX GND
GND
TX D (BAND A)
RX D (BAND B)
BAND C
RESET (BAND D)
TX INH
GND
Page 17