Geoff,
Thank you for notifying us of this issue. We completed the Agilent PNA series driver at the end of last year and only had a PNA model to test with. We listed support for the ENA family in this driver as there was a fair amount of overlap in the command sets. I am interested in fully updating and testing this driver with the ENA family, however I am having difficulty in obtaining an ENA for this purpose. If you, or anyone else, is interested in loaning this instrument to NI for the purpose of updating and testing this driver, please let me know. In the meantime, I will remove the driver's claim of support for the ENA instrument models.
Thanks,
Jason Hobbs
Instrument Drivers