Specifications

Page 28 FT-950 OPERATING MANUAL
TO
1
ANT
DC IN
2
FROM
GND
ROT
LINEAR
TUNER
PTT
REC
REM KEY
DMU CAT
EXT
SPKR
-TUNE
-TUNE
INPUT
22 A
: DC 13.8 V
REAR PANEL
EXT SPKR Jack
This 3.5-mm, 2-contact, gold-plated jack provides vari-
able audio output for an external loudspeaker. The au-
dio output impedance at this jack is 4 - 8 Ohms, and
the level varies according to the setting of the front
panel
[
AF GAIN
]
knob. Inserting a plug into this jack
disables the internal loudspeaker.
KEY Jack
This 1/4-inch 3-contact jack accepts a CW key or keyer
paddle. A two-contact plug cannot be used in this jack.
Key-up voltage is +3.3 V DC, and key-down current is
0.3 mA. Plug wiring is shown on page 15. This jack
may be configured for keyer, “Bug”, “straight key”, or
computer keying interface operation via Menu item
“
039 A1A R-TYPE039 A1A R-TYPE
039 A1A R-TYPE039 A1A R-TYPE
039 A1A R-TYPE”.
μ-TUNE Jack
This covered 10-pin mini-DIN jack is used for control
of the optional RF μTuning Kit.
DMU Jack
This covered 8-pin mini-DIN jack accepts a cable to
connect an optional DMU-2000 Data Management
Unit.
CAT Jack
This 9-pin serial DB-9 jack allows external computer
control of the FT-950. Connect a serial cable here and
to the RS-232C COM port on your personal computer
(no external interface is required).
PGM-SW Switch
This slide switch is used for updating the transceiver’s
firmware. The update software and instructions are
available for download from the Vertex Standard
website (http://www.yaesu.com/).