Yaesu FT DX 9000 CONTEST Operation Manual page 37

+13.8V
This gold-plated output jack provides regulated, sepa-
rately fused 13.8 VDC at up to 200 mA, to power an
external device such as a packet TNC. Make sure your
device does not require more current (if it does, use a
separate power source).
PTT
This gold-plated input jack may be used to provide
manual transmitter activation using a footswitch or
other switching device. Its function is identical to the
MOX button on the front panel. The same line is avail-
able at the PACKET and RTTY jacks for TNC con-
trol. Open-circuit voltage is +13.5 VDC, and closed-
circuit current is 5 mA.
PATCH
This gold-plated RCA input jack accepts transmitter
audio - either AFSK or voice - for transmission. This
line is mixed with the microphone audio input line,
so the microphone should be disconnected if using
this jack and mixing is not desired. The optimum im-
pedance is 500 ~ 600 Ohms, and the nominal input
level should be 1 mV.
EXT SPKR
The EXT SPKR two-contact output jacks are gold
plated, providing audio from the VFO-A and VFO-B
for an external loudspeaker or speakers, such as the
SP-9000. Inserting a plug into one of these jacks dis-
ables the corresponding internal loudspeaker. Imped-
ance is 4 ~ 8 Ohms.
AF OUT
This gold-plated 3-contact jack provides dual-chan-
nel low-level receiver output, for recording or exter-
nal amplification. Peak signal level is 3 Vrms at 10
kOhms. VFO-A audio is on the left channel (tip), and
VFO-B audio is on the right channel (ring). A stereo
amplifier or recorder is recommended, to record each
receiver's audio separately when dual reception is en-
abled (audio from either receiver, or both, may be used
via this jack). The front panel [ AF GAIN ] knobs do
not affect the signals at this jack.
RTTY
This 4-pin input/output jack provides connections for
an RTTY terminal unit. Pinout is shown on page 107.
The receiver audio level at this jack is at a constant
100-mV (@600 Ohms) level. FSK keying at this jack
is accomplished by a closure of the SHIFT line to
ground by the terminal unit.
PACKET
This 5-pin input/output jack provides receiver audio
and squelch signals, and accepts transmit (AFSK) au-
dio and PTT control, from an external Packet TNC.
Pinout is shown on page 106. The receiver audio level
at this jack is approximately 100 mV (@600 Ohms).
FT 9000 C O
DX ONTEST
M
PERATION ANUAL
TRV
This gold-plated RCA jack provides a low level RF
output for use with a transverter. Maximum output is
approximately –20 dBm (0.01 mW) at 50 Ohms when
the RF PWR knob is fully clockwise position.
ACC
This is an accessory jack which is used at the factory
for adjustment of the radio. Please do not connect any
cable or accessory to this terminal.
TXGND
This jack's center pin is closed to ground while the
transceiver's transmitter is engaged. It may be used
for control of a peripheral device, most typically a
linear amplifier. To enable this jack, please set Menu
item "TX GNRL 175 EXT AMP TX-GND" to the
"ENABLE" selection. This RCA connector is gold-
plated, and the specifications are shown below.
BAND DATA
BAND DATA1
This 7-pin output jack used for control of the VL-
1000 Solid-state Linear Amplifier.
BAND DATA2
This 8-pin output jack provides band selection data
which may be used for control of optional accessories
such as the VL-1000 Solid-state Linear Amplifier.
EXT ALC
This gold-plated RCA input jack accepts negative-going
external ALC (Automatic Level Control) voltage from a
linear amplifier, to prevent over-excitation by the trans-
ceiver. Acceptable input voltage range is 0 to –4 VDC.
ROTATOR
This 6-pin MINI-DIN Jack accepts a cable connected to
a YAESU G-800DXA/-1000DXA/-2800DXA Antenna
Rotator. You may control the antenna azimuth rotation
(and rotation speed) using the Function buttons on the
front panel. (Listed models are current as of early 2009).
KEY
This 1/4-inch gold-plated phone jack accepts a CW
key or keyer paddle. A 2-contact plug cannot be used
in this jack. Key-up voltage is +5 V, and key-down
current is 1 mA. Plug wiring is shown on page 19,
and this jack may be configured for keyer, "Bug,"
"straight key," or computer keying interface opera-
tion via Menu Selection "MODE-CW 051 R-
KEYER TYPE" (see page 137).
CAT
This 9-pin serial DB-9 jack allows external computer
control of the FT 9000 Contest. Connect a serial
DX
cable here and to the RS-232C COM port on your
personal computer (no external interface is required).
GND
Use this terminal to connect the transceiver to a good
earth ground, for safety and optimum performance.
Use a large diameter, short braided cable for making
ground connections, and please refer to page 13 for
other notes about proper grounding.
R R R R R P P P P P
EAR EAR ANEL ANEL
EAR EAR EAR ANEL ANEL ANEL
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