W4RT ELECTRONICS ONE-TOUCH TUNE OTT (01) PDF Document

When you want to tune your station, press the TUNE button and the W4RT ELECTRONICS ONE-TOUCH TUNE OTT takes control of the radio. Regardless of the mode you are using, the device commands the radio to produce a carrier having the same power as previously set by the radio’s PWR function command. When you have completed adjusting the antenna tuner, release the TUNE button and the radio returns to the mode you had previously selected.

If the device is marked OTT-817, it can be used only with the FT-817. If it is marked OTT-897, it can be used with the FT-817, FT-857, and FT-897.

1. Turn the FT-817 power OFF and read these instructions completely before doing anything else.

2. Position the FT-817 so that you are viewing the rear panel with the POWER plug to your left.

3. The W4RT ELECTRONICS ONE-TOUCH TUNE OTT will mount in the open space between the POWER plug and the KEY jack.

4. Take the OTT module and hold it so that the single lead is towards the POWER plug side. Place the OTT in the open space to get a feel for how it will be positioned.

5. Turn the OTT so that you see the covered Velcro pad affixed to the bottom of the OTT.

6. Remove the backing cover.

7. Carefully position the OTT into the mounting area (open space between the POWER plug and KEY jack) with the single cable to your LEFT and the two cables to your RIGHT while being careful to get the OTT positioned not to interfere with either the POWER plug or the KEY jack.

8. Firmly press the module against the FT-817 rear panel to affix the pad. Hold firmly in position for 30 seconds.

9. DO NOT attempt to separate the OTT module from the FT-817 for 24 hours in order to allow the adhesive to achieve maximum strength.

10. If you have anything plugged into the FT-817 ACC jack, then unplug it now.

11. Plug the OTT male DIN plug into the ACC jack on the FT-817.

12. If you had something plugged into the FT-817 ACC jack (Step 10, above), then plug it into the female DIN connector from the OTT.

13. Plug the supplied push-button cable into the remaining OTT Command cable jack. This is a standard 3.5-mm stereo jack. The push-button is connected to the tip and ground. You may attach any switch desired to satisfy your particular operating needs. DO NOT use the ring connection.

14. Turn the FT-817 power ON and set the CAT RATE (Menu #14) to 9600 bps.

15. The standard installation is now complete.

1. Turn the FT-857/897 power OFF and read these instructions completely before doing anything else.

2. If you have anything plugged into the FT-857/897 CAT/Linear jack, then unplug it now.

3. Plug the OTT male DIN plug into the CAT/Linear jack on the FT-897.

4. If you had something plugged into the FT-857/897 CAT/Linear jack (Step 2, above), then plug it into the female DIN connector from the OTT.

5. Plug the supplied push-button cable into the remaining OTT Command cable jack. This is a standard 3.5-mm stereo jack. The push-button is connected to the tip and ground. You may attach any switch desired to satisfy your particular operating needs. DO NOT use the ring connection.

6. Turn the FT-857/897 power ON and set Menu #085 to OFF, Menu #019 to 9600, & Menu #020 to CAT.

7. The standard installation is now complete.

8. If you want to use the OTT with a LDG AT-11MP, AT-897, RT-11, Z-100 or other like LDG autotuners in a highly integrated manner, then connect the OTT to the remote jack on the tuner (remote head if the RT-11).

Once you have the W4RT ELECTRONICS ONE-TOUCH TUNE OTT installed, the operating steps are as follows:

1. Press and hold the OTT Tune button (or whatever button you may be using).

2. Adjust your antenna tuner appropriately.

3. Release the OTT Tune button and return to operation of the radio.

The W4RT ELECTRONICS ONE-TOUCH TUNE OTT is transparent to any auxiliary equipment you have attached to the radio. For example, if you have a CAT controller attached to the radio, you only have to plug it into the OTT ACC input jack. Anything attached to the KEY or DATA jacks will not be interfered with at all.

Another important design consideration was to make the device transparent to the operation of the radio and external devices. When activated, it immediately disables communication lines to/from any external device attached to the ACC port, performs the tuning sequence, and then enables the communication lines to/from any external device attached to the ACC port upon completion.

The OTT Command cable jack is a standard 3.5-mm stereo jack. The switch closure is accomplished by shorting the tip and ground connections together. DO NOT short the ring and ground or ring and tip together. If done, the W4RT ELECTRONICS ONE-TOUCH TUNE OTT will not function. You may attach any switch desired to satisfy your particular operating needs, such as a foot switch, toggle switch, or double action push-button switch.

If you have an LDG Electronics antenna autotuner, you can attach the connecting cable to the autotuner and plug it into the OTT Command jack. Whenever you press the autotuner’s TUNE button, the W4RT ELECTRONICS ONE-TOUCH TUNE OTT commands the radio to produce a carrier as long as required by the autotuner. Upon completion of the tuning process by the autotuner, the radio returns to the mode configuration you had already selected.

When the device is not in use (monitor mode), the current drain is < 25 µA. During the brief time needed for tuning, the device draws about 20 mA. The device derives its power from the radio and functions over the entire range of the radio's power source voltages.

You can use the OTT Tune button to activate the carrier for the Z-11 and then press the LDG Z-11 Tune button. Alternatively, if you install the optional OTT/Z-11 Compatibility Kit and have at least V1.4 of the Z-11 processor, you only need to press the Z-11 Tune button (with the Z-11 in the Semi mode) for the W4RT ELECTRONICS ONE-TOUCH TUNE OTT to automatically spring into action. Once the Z-11 has completed its tuning process, the device returns to its dormant state.

When the W4RT ELECTRONICS ONE-TOUCH TUNE OTT is requested to activate the radio, the carrier is output in approximately 80 ms. The timing delay from the start of the tune command until the radio’s carrier is present is approximately 80 ms.