Using The 3920 For P25 Performance Testing

By Aeroflex

TIA has defined a subset of the transceiver tests (from TIA-102.CAAA-B) to be part of the P25 compliance assessment program (CAP). The purpose of the P25 compliance assessment program is to demonstrate that P25 base stations and subscriber units are compliant with a select group of requirements chosen from the P25 suite of standards.

P25 compliance consists of three legs:

1) P25 performance
2) P25 conformance
3) P25 interoperability

This app note will cover the P25 performance leg.

The TIA TR8 subcommittee has outlined the requirements for performance testing in several documents, each covering the requirement for a certain type of radio.

• Conventional mode subscriber unit – TSB-102.CBBA
• Conventional mode fixed station – TSB-102.CBBC
• Trunking mode fixed station – TSB-102.CBBH

With this application note, we will illustrate the role of the Aeroflex 3920 Series Radio Test Set (referred to in this app note as the 3920) and other Aeroflex products in performing these vital tests. The 3920 is an integral part in these tests and can greatly simplify the process of setting up and performing the tests.

We have divided this application note into three sections. The first section will cover the receiver tests, the second section the transmitter tests and the third section the trunking tests. Each of the tests will be described along with a block diagram that illustrates the use of the 3920 in performing these tests. The general setup will always include a 3920 and the radio under test, but will also often include other test equipment.