AutoTune for Motorola APX Series Radios User Guide
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6.17. P25 Phase II Symbol Deviation
NOTE: This test requires an analyzer with P25 Phase 2 Test Mode (R8-P25_II
option) capability.
The purpose of this procedure is to measure the radio transmitter’s P25 Phase 2
Symbol Deviation at a given frequency. Symbol Deviation is estimated by averaging the
normalized frequency deviations (of the FM representation of the phase-based
modulation) at symbol times in the received signal and then scaling by the maximum
symbol value. The TIA/EIA-102.CCAA HCPM ideal deviation is 2992 Hz. The min and
max limits are +/- 5%, or +/-150 Hz. This is a test only; there is no alignment.
Mode
Port
Frequency
Mod Mod Type Test Pattern
Monitor
RF IN/OUT Test Frequency HCPM
1031 Hz Tone
Table 6-32. Analyzer Configuration for P25 Phase 2 Symbol Deviation test
6.17.1. Test
The analyzer is setup as specified in this section’s Analyzer Configuration table. The
radio is placed into Test Mode at the lowest Tx Test Frequency and configured to
generate the indicated P25 Phase 2 waveform signal. The analyzer measures the
Symbol Deviation response which is compared against test limits and the final results
are written to the log file.
Name
Description
Result
Pass or Fail. Measured Symbol Deviation is within Max Limit
Frequency
Test Frequency
Symbol Dev Measured Symbol Deviation at Frequency
Min Limit
Minimum Limit (inclusive) for Symbol Deviation to Pass
Max Limit
Maximum Limit (inclusive) for Symbol Deviation to Pass
Table 6-33. P25 Phase 2 Symbol Deviation test results
