Page 34 FTDX5000 OPERATING MANUAL
RTTY Jack
This 4-pin input/output jack provides connections for
an RTTY terminal unit. Pinout is shown on page 15.
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.
AF OUT Jack
This 3.5-mm, 3-contact jack provides dual-channel
low-level receiver output, for recording or external am-
plification. Peak signal level is 300 mVp-p at 10 k-
Ohms. The VFO-A receiver audio is on the left chan-
nel (tip), and the VFO-B receiver audio is on the right
channel (ring). A stereo amplifier or recorder is rec-
ommended, to record each receiver’s audio separately
when dual reception is enabled (audio from either re-
ceiver, or both, may be used). The front panel
[
AF
GAIN
]
knobs do not affect the signals at this jack.
V-AF Jack
This 3.5-mm, 3-contact jack is used for connection to
the optional SM-5000 Station Monitor.
EXT SPKR Jack
This 3.5-mm, 2-contact jack provides receiving audio
output from the VFO-A and VFO-B receivers for an
external loudspeaker or speakers, such as the SP-2000.
Inserting a plug into the jack disables the internal loud-
speaker. Impedance is 4 ~ 8 Ohms.
E.ALC Switch
This slide switch is used to select the ALC gain; it is
normally set to position “1”. Slide the switch to posi-
tion “2”, if the ALC gain is too high for the connected
linear amplifier.
PTTJack
This RCA 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 available at
the PACKET and RTTY jacks for TNC control. Open
circuit voltage is +13.5 VDC, and closed-circuit cur-
rent is 5 mA.
TRV Jack
This RCA jack provides a low level RF output for use
with a transverter. Maximum output is approximately
–10 dBm (0.1 mW) at 50 Ohms.
In the UK version, 135.7 - 137.8 kHz TX signal is
output from this terminal. Output level is +10 dBm at
50 Ohms.
EXT ALC Jack
This RCA input jack accepts negative-going external
ALC (Automatic Level Control) voltage from a linear
amplifier, to prevent over-excitation by the transceiver.
Acceptable input voltage range is 0 to –4 VDC.
TX GND Jack
This RCA jack is closed to ground while the transmit-
ter is engaged. It may be used for control of a periph-
eral device, most typically a linear amplifier. To en-
able the jack, set Menu item “172 TGEN ETX-GND”
to the “ENABLE”.
The relay circuit used for this jack is capable of switch-
ing an AC voltage of 100 Volts at up to 300 mA, or a
DC voltage of 60 V at 200 mA, or DC 30 V at up to 1
Amp.
REAR PANEL CONNECTIONS
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