FT-2000
Operating Manual
Vertex Standard Co., Ltd.
32
17. REC Jack
This RCA jack provides low-level receiver audio output and transmit audio, for
recording or external amplification. Peak signal level is 3 Vrms at 10 kOhms.
18. 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.
19. TX REQ Jack
When this RCA jack shorted to ground, puts the FT-2000 into the transmit mode, and
send out a steady CW carrier, for linear amplifier or manual antenna tuner
adjustment.
20. TX GND Jack
This RCA 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 “134 tGEn ETX-GND” to the
“ENABLE” selection.
The relay circuit of the FT-2000 used for this jack is capable of switching AC voltage of
100 Volts at up to 300 mA, or DC voltages or 60 V at 200 mA or 30 V at up to 1 Amp.
21. +13.8 V Jack
This RCA output jack provides regulated, separately 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).
22. AF OUT
This gold-plated 3-contact jack provides dual-channel low-level receiver output, for
recording or external amplification. Peak signal level is 3 Vrms at 10 k-Ohms. Main
band (VFO-A) receiver audio is on the left channel (tip), and sub band (VFO-B) receiver
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 enabled (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.
