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HTI3 Tech Notes

RA8GA, PA5, or HTI3 behave erratically


Product: RA8GA, HTI3
Version: RA8GA serial numbers < 2066, HTI3 serial numbers < 1018
Date Added: 2009-06-02


Timing errors may occur when using the RA8GA, PA5, or HTI3 if the zBUS clock lines become overloaded. This happens most often when two RA8GA devices are placed in the same zBUS caddie but can also happen with any other combination of these devices. Symptoms of this issue include erratic behavior of the LEDs or buttons (i.e. LEDs flash erroneously when a button is pressed or unresponsiveness when a button is pressed)


If possible, rearrange the affected devices so that they are not located in the same zBUS caddie.


If you have experienced this problem, contact TDT for an RMA.

MiniBird not getting identified by the HTI3 interface


Product: HTI3
Version: All
Date Added: 2006-08-18


There are two address modes for the MiniBird - normal and extended. When using the HTI3 interface, the MiniBird must be operated in normal mode. If the MiniBird is not configured correctly it will not be identified by the HTI3 interface. The Data LED on the HTI3 will flash slowly (~1 Hz) to indicate that the motion tracker is not properly connected to the HTI3. The Ch1 Stat and Ch2 Stat LED's will also flash slowly when the HTI3 is not receiving any data from receiver 1 and receiver 2.


When using the MiniBird motion tracker with the HTI3 configure it for Normal Addressing mode. To do this set the DIP switch on the back of the device as shown below. If you need to add a second MiniBird, first refer to the documentation then call TDT for further assistance if needed.

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