P25 Application Note
The TIA-102 has written the methods to accomplish the P25 measurements with swept spectrum analyzers; however, most P25 test engineers are able to simplify the execution of a number of the transmitter tests leveraging the architecture of the Real-Time Spectrum Analyzer (RTSA) platform.
P25 Fact Sheet
Tektronix P25 solution is available on multiple platforms. This fact sheet gives you a summary of the measurements and the instruments supported.