FT-2000
Operating Manual
Vertex Standard Co., Ltd.
63
When performing tests (such as the setup of the [MIC] or [RF PWR] knobs), be sure
to check the frequency before transmitting, so as to avoid interference to others who
may already be using the frequency.
Four techniques for exercising Transmit/Receive control are provided on the
FT-2000, and you may choose the technique(s) that best suit your operating needs:
Pressing the microphone’s PTT switch will engage the transmitter.
The rear panel PTT jack may be connected to a foot switch or other manual
switching device in order to engage the transmitter.
Pressing the front panel [MOX] button will lock the transmitter on. Press the
[MOX] button again to return to receive.
The VOX (Voice Operated Xmit) circuit will engage the transmitter
automatically when you speak into the microphone. For details of VOX
operation, see page xx.
Using the Automatic Antenna Tuner
The Automatic Antenna Tuner (hereinafter referred to as the “ATU”) built into each
FT-2000 is crafted to ensure a 50-Ohm load for the final amplifier stage of the
transmitter. We recommend that the ATU be used whenever you operate on the
FT-2000.
Advice:
The ATU of the FT-2000, being located inside the station, only adjusts the
impedance presented to the transceiver at the station end of your coaxial cable
feedline. It does not “tune” the SWR at the antenna feedpoint itself. When
designing and building your antenna system, we recommend that every effort be
made to ensure a low SWR at the antenna feedpoint.
The ATU of the FT-2000 includes 100 memories for tuning data. Eleven of these
memories are allocated, one per Amateur band, so that each band has at least one
setting preset for use on that band. The remaining 89 memories are resaved for the
89 most-recent tuning points, for quick frequency change without the need to
retune the ATU.
The ATU in the FT-2000 is designed to match impedance within the range of 16.5
Ohms to 150 Ohms, corresponding to an SWR of 3:1 or less (HF amateur bands, 6
m amateur band: 25 Ohms to 100 Ohms, corresponding to an SWR of 2:1 or less).
Accordingly, simple non-resonant whip antennas, along with random-length wires
and the “G5RV” antenna (on most bands) may not be within the impedance