CMX865D2 CML Microcircuits, CMX865D2 Datasheet - Page 37

• Manufacturer Part Number: CMX865D2
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
Notes:
© 2005 CML Microsystems Plc
Receive Bell 103 FSK Mode
Receive V.23 FSK Mode
Receive Bell 202 FSK Mode
Rx Modem Signal
Acceptable baud rate
Mark (logical 1) frequency, high band
Space (logical 0) frequency, high band
Mark (logical 1) frequency, low band
Space (logical 0) frequency, low band
1200 baud
75 baud
1200 baud
150 baud
Signal level
Signal to Noise Ratio (noise flat 300-3400Hz)
Acceptable baud rate
Mark (logical 1) frequency
Space (logical 0) frequency
Acceptable baud rate
Mark (logical 1) frequency
Space (logical 0) frequency
Acceptable baud rate
Mark (logical 1) frequency
Space (logical 0) frequency
Acceptable baud rate
Mark (logical 1) frequency
Space (logical 0) frequency
8. Rx 2 or 4-wire line signal level assuming 1dB loss in line coupling transformer with Rx
Gain Control block set to 0dB and external components as section 4.2.
37
Notes
Notes
Notes
Notes
8
2213
2013
1258
1058
1188
1280
2080
1188
1180
2180
Min.
Min.
Min.
Min.
297
382
442
148
377
477
-45
74
20
2225
2025
1270
1070
1200
1300
2100
1200
1200
2200
Typ.
Typ.
Typ.
Typ.
300
390
450
150
387
487
75
-
-
2237
2037
1282
1082
1212
1320
2120
1212
1220
2220
Max.
Max.
Max.
Max.
303
398
458
152
397
497
76
-9
-
CMX865
Units
Baud
Units
Baud
Baud
Units
Baud
Baud
Units
D/865/3
dBm
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
dB