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Old 12-01-2011, 08:03   #16
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Join Date: Apr 2007
Posts: 718
Originally Posted by Sheriff View Post
you said that the tuner is an AT130.the settings in the radio comes with them set for an AT140.Trying to transmit can and will cause permanent damage to the tuner and radio.
I just confirmed, for the sake of argument, that which I already knew. It doesn't matter which tuner setting you have made in the setup mode as far as the "tune" operation goes. You cannot cause damage to the radio or tuner as a result of having the setting wrong. The only difference in settings is that the AT140 and AH3/4 have a tuner bypass function which can be turned on/off when using the M802. If for example, you have an M802 connected to an AT130 and the M802 is set for using an AT140, when you try to set the tuner to bypass mode, it will instead go into tune mode because it doesn't have a bypass mode. If you set the M802 for using the AT130 and you try to do the bypass function, it will just beep at you letting you know that this function is unavailable. That is the only difference. With the M802, when you press the TUNE button, it sends a negative going pulse via the start (white) wire to the tuner. This will be a 500ms pulse regardless of set mode tuner setting. When setting the bypass function, this pulse is an 80ms pulse which the AT140/AH-3/4 will recognize as the command to go into bypass mode. The AT130/AT120 will not recognize this and will simply go into TUNE mode.


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