Hi,
I suppose you mean the settings of "offset" or "Period" values of the channel.
The timer ticks unit are supported only if the counter frequency is not set to "Auto select".
You have to specify the Counter frequency to some valid value (if you don't know, type there current value from third column) and then the timer-ticks unit appear in the list of possible units and it can be used.
best regards
Petr Hradsky
Processor Expert Support Team