Can your software simultaneously collect dual frequency for both high and low frequency soundings?

Yes, when your echo sounder has a serial data output capable of transferring dual frequency depth data to a PC, the depth reading for both the high and low frequencies will be stored into the raw data file.

You can check if this work by checking the "Data View" window. It should how both depths after connecting the echo sounder.

Depth values recorded with a dual frequency echo sounder.