Freedom R8100 SERIES, Operator'S Manual

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3 kHz. This setting is used in conjunction with the Low Pass Filter to determine the audio pass band for
the R8100 baseband circuitry.
Low Pass Filter
Activates a horizontal submenu with audio filter selections that determine the low pass frequency for the
R8100’s baseband response to recovered audio. The “cut-off” frequency selections are 300 Hz, 3 kHz,
and 20 kHz. This setting is used in conjunction with the High Pass Filter to determine the audio pass band
for the R8100 baseband circuitry.
Note: For best audio and measurement quality always set an audio pass band no wider than necessary
for the signal of interest. Example: A typical 2-way radio audio pass band is 300 Hz to 3 kHz. Pass
bands wider than necessary allow more noise in the measurement and degrade the audio quality and the
readings for deviation, frequency error, SINAD, etc. The default settings for the R8100 High and Low
Pass filters are 300 Hz and 3 kHz respectively.
2.2.3.3 Settings for PL, DPL, DPL Invert A/B Sequence, 5/6 Tone, POCSAG and General Sequence
Formats
The following settings appear in Audio Zone submenu pages when specific encoding formats are chosen
in the Format horizontal menu - see Figure 3.2.4.2-1.
PL Table (displayed in Audio Zone submenu when synthesizer Format selected is PL)
Activates a selection table Motorola Private-Line tone coded squelch signaling and provides a listing of
valid codes/frequencies – see Figure 3.2.4.3-1. The codes and associated frequencies are selected using
the Up/Down (▲▼) and Left/Right (◄►) keys to scroll through the table and pressing Enter to complete
the entry. Choosing a blank field removes PL coding from the Audio Sum. For valid codes see Table B-
3 in Appendix B.