Our new software release (Feb 2015) will enable the SA124B to make occupied bandwidth, channel power, adj. CP, harmonic distortion, as long as all signals analyzed fit within 40 MHz, and are roughly “white” when viewed as narrow-band. Our current software supports everything but occupied bandwidth.
You can easily measure devices with any bandwidth using the TG and SA. However, these would generally be swept scalar measurements (no vector information for impedance matching). We have single-frequency vector capabilities with our Smith Chart utility, but it does not have all of the VNA length correction features, etc, so you might need a calculator and a few complex multiplies to get a useful vector impedance measurement.