Land Mobile Radio Analyzer and Coverage Measurement Guide : P25 Analyzer (Option 521)
 
P25 Analyzer (Option 521)
 
Introduction
Setup Procedure
Direct Connect to the Transmitter
Over the Air (OTA) Analysis Setup
Using the Signal Generator for Receiver or OTA Analysis
P25 Analyzer Graphs
Constellation and Linear Constellation
Histogram Graph
Spectrum Graph
Eye Diagram
Summary Graph
P25 Control Channel Measurements
Decoding Control Channel Measurements
P25 Coverage
P25 Bit Capture
P25 IQ Data
P25 Analyzer Menus
Frequency Menu
Amplitude Menu
Vertical Scale Menu
Setup Menu
Measurement Menu
Display Menu
Control Channel Menu
Sweep Menu
Measure Menu
Trace Menu
Limit Menu
Other Menus
Note 
Option 521 include P25 demodulation (this Chapter) and P25 Phase 2 demodulation (P25 Phase 2 Analyzer (Option 521)).
Introduction
The P25 Analyzer option provides a method to verify the operation of APCO Project 25 (P25) and Linear Simulcast Modulation (LSM) tower, mobile, and portable radio transmitters. Option 521 includes the ability to display constellations, spectrum, histogram, and eye diagram graphs. In addition, a summary graph displays numeric values of received power, frequency error, modulation fidelity (Mod Fid), bit error rate (BER), symbol deviation, Network Access Code (NAC), symbol rate error of the input signal and control channel Signal-to-Interference-plus Noise Ratio (SINR). BER comparisons can be made to the Standard Tone or the Standard Transmitter Test (O.153) pattern, regular voice traffic using a proprietary algorithm, or a Message Error Rate (MER) can be computed using the control channel messages CRC checking. In addition, estimated BER on the control channel uses a proprietary algorithm.
The LMR Master will analyze input signal strengths from +33 dBm (2.0 watts) down to levels approaching the sensitivity of P25 radios, with the ability to automatically adjust the input sensitivity based on input levels.