// ACAM TDC GPX model. Almost as crappy as the real thing, but at least doesn't produce the infamous 4ns errors :-) Thanks ACAM for making reliable chips!
//
// Limitations:
// - I-mode only (81 ps bin size)
// - Internal start retrigger only
// - Doesn't support StartOffset or external starts
// - 5 TTL Stop channels only.
// - Not configurable through the registers (settings are fixed, writes are ignored).