Automatic Antenna Tuner; Operation - Kenwood TS-450S Instruction Manual

4-9. AUTOMATIC ANTENNA TUNER OPERATION
Note
1. The autotuner function is unavailable on the TS-690S models and on the TS-450S models that do not
contain an antenna tuner.
2. The autotuner does not function in the 1.8MHz Band.
3. To use the 5OMHz Band with the TS-690S, connect the antenna directry to ANTENNA 2.
Output power of the transceiver will automatically be reduced to approximately 10 watts during the tuning
process to protect the finals against damage.
The automatic antenna tuner has the following two modes:
@® Automatic Tune mode
In this mode, tuning signals are transmitted to tune the antenna and transceiver automatically.
1. Set the THRU/AUTO switch to AUTO(=).
2. Set the AT TUNE key to ON.
The transceiver switches to the CW mode, the AT
TUNE indicator lights, and the unit starts tuning. =
1)
AT TUNE indicator
Note
The tuner will not function when the CAR control is
turned fully counterclockwise.
3. When tuning is completed and the AT TUNE indicator
goes out, the frequency display returns automatically.
4. A warning beep tone is sounded if tuning is not
completed within 20 seconds. If this occurs press the
THRU/AUTO switch to THRU, and then repeat steps
(2| 1= 2:
Note
If a warning beep tone sounds, the antenna system
may be defective, so check it.
Once tuning has been done, the tuning state is stored in
memory. If the amateur band is changed, the tuning
state for that amateur band is set automatically. Thus,
the tuning time is reduced.
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