What to check when experience intermittent control issues with Spectra IV version 1.08 or newer?
Spectra IV version 1.08
Dip switch settings on the dome drive.
If there are problems with control or behavior such as stopping when a pattern or preset has been called, verify that the DIP Switch 2-3 is set to the "ON" position. Setting the DIP Switch 2-3 to "ON" enhances Coaxitron communication, addresses problems with P and D protocol and may work with other 3rd party applications such as Dedicated Micros and other manufacturer's equipment.
Note: This only apply to Spectra IV version 1.08 and newer.