external local oscillator

Hello. I have NI PXIe 5673. In what instances do I need to use an external local oscillator instead of the NI PXIe 5652. I will be transmitting a DSB-ASK signal with a carrier frequency of 915 MHz. Sorry, I’m new here in NI so I’m quite confused. Thank you!

These forums are not the place for this kind of question - you really need to use the National Instruments official Developer Zone forums.

https://decibel.ni.com/content/community/zone

-Danny