User's Manual

FT-950
Operating Manual
Vertex Standard Co., Ltd.
62
blinking).
4. While tuning around the band using the Main Tuning Dial knob, you will observe
that the “TUNER” icon blinks momentarily every 10 kHz. This momentary
blinking indicates that a new tuning window has been entered. If you want to save
tuning data associated with this 10 kHz window, repeat step 4 (above) for each
such window. On bands like 1.8 MHz where the impedance may change rapidly,
the storage of a number of tuning points is recommended.
5. To disconnect the ATU from the transmit line, press the [TUNE] button
momentarily. The “TUNER” icon will turn off, confirming that the ATU has been
turned off. In the “Off” mode, the transceiver will be directly connected to the
coaxial cable connected to your antenna, and will operate based on whatever
impedance is present at the station end of the coax.
Advice: The ATU circuit is located between the final amplifier and the rear-panel
antenna jack; reception is not affected by the ATU.
Quick Points:
 As shipped from the factory, only one ATU alignment point is saved on each
Amateur band. This was memorized during the final alignment and performance
verification stages on the production line.
 The momentary flickering of the “TUNER” icon occurs whenever you cross over
into a new 10 kHz ATU memory window.
Note: Please check the operating frequency before beginning the tuning process, to be
sure you are not interfering with others who may already be using the frequency.
Terminology: Antenna Tuner Memories: The microprocessor of the ATU makes a note of
the positions of the tuning capacitors and the selected inductors, and stores the data
for each 10 kHz window in which tuning has occurred. This eliminates the need to
re-tune every time you return to a frequency on which you already have completed the
tuning process.
About ATU Operation
Figure 1 depicts a situation where normal tuning via the ATU has been successfully
completed, and the tuning data has been stored in the ATU memory. The antenna
system as seen by the transmitter is shown.