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AutoTune™ User Guide

4.8. Digital Sensitivity (BER)

NOTE: This test requires an analyzer with P25 Conventional test mode capability.

The purpose of this procedure is to measure the radio receiver’s Bit Error Rate at a

given frequency. The TIA/EIA standard BER rate is 5%. This is a test only; there is no

alignment.

RF Control

Port

Frequency

Modulation

Level

Generate

RF IN/OUT

Test Frequency

Framed 1011 Hz Pattern,

2.83 kHz deviation

-116.0 dBm

Table 4-20. Analyzer Configuration for Digital Sensitivity (BER) test

4.8.1. Alignment

No alignment is needed.

4.8.2. Test

The analyzer is setup as specified in this section’s Analyzer Configuration table. The

radio is placed into Test Mode at the lowest RX Test Frequency, ready to receive a

C4FM-modulated signal from the analyzer. Once BER synchronization is detected, the

analyzer output level is decreased until a BER of 5% is measured. The analyzer output

level at 5% BER is compared against test limits and the final results are written to the

log file.

Name

Description

Result

Pass or Fail. Digital Sensitivity (BER) output level within Max Limit

Frequency

Test Frequency

5% BER

Analyzer output level at which the radio BER measures 5%

Max Limit

Maximum Limit (inclusive) for Digital Sensitivity (BER) to Pass

Table 4-21. Digital Sensitivity (BER) test results

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 45 46

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ATCOM AT800 Series User Manual Page 20