CMX7164 Datasheet, PDF (93/146 Pages) CML Microcircuits – Automatic frame sync detect

CMX7164 Multi Mode Modem
1.00E-01
1.00E-02
CMX7164
Pulse shaping: RRC Only
Pulse shaping: RRC + Sinc
1.00E-03
1.00E-04
1.00E-05
1.00E-06
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
Signal to Noise Ratio / dB
Figure 69 12.5kHz Channel Sensitivity With and Without Sinc Filter Comparison
Data transfer may have channel coding applied to it when 4-FSK modulation is selected. The graph in
Figure 70 shows the improvement due to channel coding in the 12.5kHz channel case (4.8ksymbols/s with
an RRC only pulse shaping filter).
1.00E-02
1.00E-03
4FSK Raw
4FSK Block Type 2
1.00E-04
1.00E-05
1.00E-06
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
Signal to Noise Ratio / dB
Figure 70 Sensitivity: 12.5kHz Channel, 4.8ksymbols/s With and Without Coding
 2015 CML Microsystems Plc
Page 93
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