Freedom R8100 SERIES, Руководство оператора

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2.2.7.3.1 P25 transmitter tests
Figure 2.2.7.3.1-1 Main screen in Monitor mode Voice Frame Decode
P25 Transmitter tests are performed with the R8100 in Monitor or Duplex mode and protocol specific
tests are accessed with the PROJECT 25 soft key – see Figure 2.2.7.3.1-1. For Bit Error Rate (BER)
testing the manufacturer’s RSS software is required. This configures the radio in a special test mode for
transmitting TIA/EIA-102.CAAA compliant test patterns such as 1011 Hz Tone, Calibration, Standard Tx
(O.153/V.52), etc.
The TIA/EIA-102.CAAA compliant test patterns provided in the R8100 may be classified into two groups:
read-only and modifiable. The read-only test patterns include the Standard Tx (O.153/V52), Symbol Rate,
Low Deviation, C4FM Mod Fidelity patterns and Calibration. With the exception of Calibration, these
patterns are all defined in the standard without a NAC field. Therefore, it would not be appropriate for
the R8100 to allow the NAC value to be changed. Additionally, Calibration is defined in the standard with
a fixed NAC value of 293 that may not be edited. In contrast, modifiable test patterns include 1011 Hz
Tone and Silent because they contain parameters (NAC, VoiceFrame field) that may be edited by the user.
The tests performed are as follows: