Freedom R8100 SERIES, Operator'S Manual

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Note: A transmitter that sends zero will be heard only by radios with the radio access scheme disabled.
Test Pattern (NXDN™ submenu)
Provides selection of bit patterns for testing the radio in receive mode. Some may require the radio to be
under RSS control. The following patterns are available:
1031 Hz Tone – The framed test pattern of the 1031 Hz half-rate vocoder tone (NXDN™ CAI compliant).
1011 Hz Tone – (Only selectable for Bit Rate 9600 bps) The framed test pattern of the 1011 Hz full-rate
vocoder tone. (NXDN™ CAI compliant).
Calibration (O.153 2%) – The test pattern derived from the 511 (O.153) pattern to yield a 2.005871%
BER used to verify BER measurements are operating correctly.
511 (O.153) – The unframed test pattern of continuously repeating 511-bit pseudo random number
sequences generated with a 9 bit shift register (PN9) based on ITU-T O.153 (formerly CCITT V.52) used
to perform BER testing for checking the modulation, encoding, and timing of the transmit signal
(NXDN™ CAI compliant).
511 (O.153) Framed – A framed test pattern consisting of 73 384-bit frames that contain the 20-bit frame
synchronization word and 364 bits of 52 copies of the 511-bit sequences (FSW + PN9) used to perform
BER testing for checking the modulation, encoding, and timing of the transmit signal.
Interference – Interfering Modulation Data Stream – 32767-bit pseudo-random number pattern defined by
ITU-T.
Max Freq Deviation – The maximum frequency deviation test pattern of a continuously repeating stream
of high deviation symbols (+3, +3, -3, -3, …).
1/3 Freq Deviation – The test pattern of a continuously repeating stream of low deviation symbols (+1,
+1, -1, -1, …) for a 1/3 maximum frequency deviation.
Modulation Mode (NXDN™ submenu)
A horizontal submenu provides choice of Off, Continuous, or Burst mode for the selected Test Pattern
modulation. Note: Enabling a test pattern in Generate mode will erase any previously captured Voice
Recordings.