Vertex Standard FT-857 Manual Do Utilizador
33
FT-857 Operating Manual
DATA Jack
This 6-pin, mini-DIN jack accepts AFSK input from a Ter-
minal Node Controller (TNC); it also provides fixed-level
Receiver Audio Output, Push-To-Talk (PTT), Squelch Sta-
tus, and ground lines.
minal Node Controller (TNC); it also provides fixed-level
Receiver Audio Output, Push-To-Talk (PTT), Squelch Sta-
tus, and ground lines.
ACC Jack
This 3.5-mm 3-pin jack accepts external ALC (Automatic Level Control) voltage from
a linear amplifier on the tip connection, and accepts a “Transmit Request” command on
the ring connection. The main shaft is the ground return.
The “TX Request” connection, when shorted to ground, puts the FT-
857 into the transmit mode, and sends out a steady CW carrier, for
linear amplifier or manual antenna tuner adjustment.
a linear amplifier on the tip connection, and accepts a “Transmit Request” command on
the ring connection. The main shaft is the ground return.
The “TX Request” connection, when shorted to ground, puts the FT-
857 into the transmit mode, and sends out a steady CW carrier, for
linear amplifier or manual antenna tuner adjustment.
KEY Jack
This 3.5-mm, 3-pin jack is used for connection to a CW keyer paddle or a straight key.
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
audio output impedance at this jack is 4
W ~ 16 W and the level varies
according to the setting of the front panel’s AF control.
144/430 MHz Antenna Jack
Connect your 144 and/or 430 MHz antenna’s 50
W coaxial cable to this M-type (“SO-
239”) connector.
HF/50 MHz Antenna Jack
Connect your HF and/or 50 MHz antenna’s 50
W coaxial cable to this M-type (“SO-
239”) connector.
R
EAR
P
ANEL
C
ONNECTORS
DATA
DATA OUT
1200bps
1200bps
DATA OUT
9600bps
SQL
GND
PTT
DATA IN
EXT ALC
GND
TX REQ
SIGNAL
GND
COMMON
COMMON
DOT
DOT
DASH
DASH
KEY
GND
GND
KEY