FT-950
Operating Manual
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
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
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.
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