Hi magvar,
Depending on your application development environment (ADE) API (LabVIEW, CVI, VC++ etc.) you will want to configure the counter for continuous pulse generation. There are two pulse specs that you have to configue. The first configures the delay in number of edges of your source and the second configures the width of your pulse. Therefore if you set pulse spec (ND_COUNT in C code) 'A' to N/2 and pulse spec 'B' to N/2 then your pulse train will output a pulse every Nth pulse on the source.
Each ADE will have a shipping example that demonstrates this configuration. These examples ship with NI-DAQ and can be found in the NI-DAQ folder of National Instruments unless it is LabVIEW or CVI in which case it should be in their respective direc
tories. Hope that helps. Have a good day.
Ron