Freedom R8000C 테스트 - 페이지 2

{카테고리_이름} Freedom R8000C에 대한 테스트을 온라인으로 검색하거나 PDF를 다운로드하세요. Freedom R8000C 4 페이지. Testing motorola p25 phase 2 radios

Application Note

Scope

This application note is focused on testing the P25 Phase 2 digital capabilities of the radio. For additional information on

analog and Phase 1 conventional mode testing, please refer to the appropriate app note. For information on our AutoTune

option for the R8000, please reference the Operator's Manual and radio-specific User's Guide available on our website

(www.freedomcte.com).

This procedure is to be performed after the radio has been aligned and tested in analog mode according the procedures in

the radio's service manual.

Motorola CPS and Tuner Software

Motorola provides a CD containing software programming facilities for the radio's channels and functions (CPS). The Tuner

software is intended to provide adjustment and realignment of several of the radio's parameters, such as RX front end and

RF Power.

Radio Configuration

No custom channels are required to test the Phase 2 capabilities of the radio.

Note: All tests MUST BE conducted in test mode using Motorola's Tuner software.

Conducting P25 Phase 2 Tests with the R8000

It is important to note that Phase 2 makes use of two separate digital modulation schemes for uplink/downlink. For inbound

transmissions, the portable/mobile radios transmit using H-CPM. For outbound transmissions, the base station transmits

using H-DQPSK.

Conducting P25 Phase 2 Tests with the R8000

It is important to note that Phase 2 makes use of two separate digital modulation schemes for uplink/downlink. For inbound

transmissions, the portable/mobile radios transmit using H-CPM. For outbound transmissions, the base station transmits

using H-DQPSK.

P25 Phase 2 voice channels are 12.5 kHz wide and contain two time slots. Each slot carries a separate channel of traffic.

This means the portable/mobile radio is only transmitting 50% of the time.

Transmitter Tests

The following tests are performed to verify the Phase 2 functionality of the transmitter:

Testing Motorola P25 Phase 2 Radios Using the Freedom Communications System Analyzers