How fast can I control a E8257D Sig Gen and E4446A Spectrum Analyser using the NI GPIB-USB-HS+ interface card?
The sequence in LabVIEW is
1) Set the Sig Gen freq,
2) Set the spectrum analyzer Cent Freq,
3) Mkr to Peak,
4) read back marker amplitude and freq.
5) Repeat with next Freq.
The span time for E4446A is < 15msec/sweep; yet it takes > 0.8 second per freq. I was expecting as much as 10X faster since E4446A span time is < 15msec and the transfer rate for NI GPIB-USB-HS+ is > 1.8Mbytes/sec. What can I do to improve time?