Can the Bird VNA perform reverse or backward frequency sweeps?

To date, the Bird series of vector network analyzers does not have the ability to perform reverse frequency sweeps. Note that this is not a limitation of the hardware but a lack of functionality in the software/firmware. To help us understand the need better, we would appreciate customer input on what applications call for this type of capability and allow us to better to prioritize it against other new functionality. Please share by emailing our applications engineering team at [e-mail]. 

Thanks in advance!