RFX144V24-S23 and RFX96V24-S23 Modem Designer’s Guide
1070
8-5
REFERENCE MESSAGE
ENCODING
DISABLE AGC
INCREASE OR
DECREASE LEVEL
AT RIN AS NEEDED
ENCODE A
MESSAGE
PLAYBACK
MESSAGE
SAVE
REFERENCE
MESSAGE
MESSAGE HAS
DESIRED UNIFORM
PLAYBACK LEVEL?
END
Yes
No
AGC ENERGY
REFERENCE LEVEL
MAXIMUM GAIN =
0000h/7FFFh
ENABLE AGC
ENCODE A MESSAGE WITH
UNIFORM ENERGY LEVEL
DISTINCTIVELY GREATER THAN
REFERENCE ENERGY LEVEL
PLAYBACK
MESSAGE
PLAYBACK
LEVEL GREATER THAN
REFERENCE
PLAYBACK
LEVEL?
PLAYBACK
LEVEL LESS THAN
REFERENCE
PLAYBACK LEVEL?
END
No
No
DECREASE
AGC ENERGY
REFERENCE
LEVEL/
DECREASE
GAIN
ADAPTATION
THRESHOLD
INCREASE
ENERGY
REFERENCE
LEVEL
Yes
AGC GAIN ADAPTATION
THRESHOLD
ENABLE AGC
ENCODE A MESSAGE
WITH UNIFORM
ENERGY LEVEL
DISTINCTIVELY
GREATER THAN
REFERENCE ENERGY
LEVEL
PLAYBACK
MESSAGE
PLAYBACK
LEVEL GREATER THAN
REFERENCE
PLAYBACK
LEVEL?
PLAYBACK
LEVEL LESS THAN
REFERENCE PLAYBACK
LEVEL?
END
No
No
INCREASE
GAIN
ADAPTATION
THRESHOLD
DECREASE
GAIN
ADAPTATION
THRESHOLD
Yes
Yes
1070F8-4A
Yes
Figure 8-3. AGC Implementation
Содержание RFX144V24-S23
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