Now I just need to be able to do burst and sweep at the same time without having to use a high pass filter.
You have piqued my curiosity there, and with your earlier mention of time-of-flight measurements. Would you mind describing what experiment you have in mind? Thanks!
Sure.
Let's say you have some gas-like medium with a really high index of refraction with respect to an electromagnetic wave with a particular frequency propagating though this medium. Well, then it's fairly easy to map out the propagating electromagnetic field topology, and play it as a movie.
Why? 30MHz has a freespace wavelength of around 10meters. But in a medium with a high index of refraction, that wavelength can shrink down to centimeters as the speed of propagation is slowed down to some percentage of the speed of light.
Sweet. So how do we go about mapping out this time varying electric/magnetic field within the gas-like medium?
Have one antenna as your exciter which is connected to a SDG2042X and another one that is connected to an oscilloscope and mounted to a 2D or 3D movable stage. The SDG2042X will send a sinwave with some amount of cycles to the exciting antenna.
Everytime you trigger your SDG2042X via a software trigger, the AUX out will trigger the oscilloscope, while the other channel on the scope will capture the electric/magnetic field seen by the receiving antenna. As you begin to move the receiving antenna away from the exciter, you will notice an increasing distance between the AUX trigger and the beginning of the sinwave pulse seen on your scope.
You can then use all the data collected, which is a function of position and time, to reconstructed the electromagnetic field topology, and watch it evolve in time.
If you have a few horn antennas, this is pretty easy to do in free space with a high enough frequency. But the equipment will cost you a fortune.