Counter n Internal Output and Counter n TC SignalsThe Counter n Internal Output signal changes in response to Counter n TC.The two software-selectable output options are pulse output on TC and toggle output on TC.The output polarity is software-selectable for both options.With pulse or pulse train generation tasks, the counter drives the pulse(s) on the Counter nInternal Output signal. The Counter n Internal Output signal can be internally routed to be acounter/timer input or an “external” source for AI, AO, DI, or DO timing signals.Routing Counter n Internal Output to an Output TerminalYou can route Counter n Internal Output to any PFI terminal.Frequency Output SignalThe Frequency Output (FREQ OUT) signal is the output of the frequency output generator.Routing Frequency Output to a TerminalYou can route Frequency Output to any PFI terminal.Worldwide Support and ServicesThe NI website is your complete resource for technical support. At ni.com/support, you haveaccess to everything from troubleshooting and application development self-help resources toemail and phone assistance from NI Application Engineers.Visit ni.com/services for information about the services NI offers.Visit ni.com/register to register your NI product. Product registration facilitates technicalsupport and ensures that you receive important information updates from NI.NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas,78759-3504. NI also has offices located around the world. For support in the United States,create your service request at ni.com/support or dial 1 866 ASK MYNI (275 6964). Forsupport outside the United States, visit the Worldwide Offices section of ni.com/niglobal toaccess the branch office websites, which provide up-to-date contact information.Information is subject to change without notice. Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks forinformation on NI trademarks. Other product and company names mentioned herein are trademarks or trade names of theirrespective companies. For patents covering NI products/technology, refer to the appropriate location: Help»Patents in yoursoftware, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents. You can findinformation about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Referto the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and howto obtain relevant HTS codes, ECCNs, and other import/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES ASTO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S.Government Customers: The data contained in this manual was developed at private expense and is subject to the applicablelimited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.© 2018 National Instruments. All rights reserved.377693B-01 October 29, 2018