RFX144V24-S23 and RFX96V24-S23 Modem Designer’s Guide
9-4
1070
START
CONFIGURE FOR FSK
20h CONF (6:0-7)
1 SETUP (1F:0)
NO
NO
NO
NO
NO
SETUP = 0?
MONITOR
FR2 BIT
FR2 (8:6) = 1?
YES
YES
YES
YES
TIME OUT
3 SECONDS?
DELAY 600ms
CHECK
FR2 BIT
FR2 = 0?
CHECK
FR2 BIT
FR2 = 1?
DELAY 3.6
SECONDS
CNG DETECTED
CNG NOT DETECTED
PHASE A
1070F9-4
Figure 9-4. Detecting CNG Tone (1100 Hz)
Summary of Contents for RFX144V24-S23
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