V.22 bis Modem with AT Commands
CMX866
Rx Modem S1 Pattern Detector
(DPSK and QAM modes)
Will detect S1 pattern lasting for
Will not detect S1 pattern lasting for
Hold time (minimum detector ‘On’ time)
Notes
Min.
90.0
5.0
Typ.
Max.
Units
ms
-
-
-
72.0
-
ms
Rx Modem Energy Detector
Detect threshold (‘Off’ to ‘On)
Undetect threshold (‘On’ to ‘Off’)
Hysteresis
Notes
10,11
10,11
10,11
Min.
-
-48.0
2.0
Typ.
Max.
-43.0
-
-
Units
dBm
dBm
dB
-
-
-
Detect (‘Off’ to ‘On’) response time
QAM and DPSK modes
300 and 1200 baud FSK modes
150 and 75 baud FSK modes
10,11
10,11
10,11
10.0
8.0
16.0
-
-
-
35.0
30.0
60.0
ms
ms
ms
Undetect (‘On’ to ‘Off’) response time
QAM and DPSK modes
300 and 1200 baud FSK modes
150 and 75 baud FSK modes
10,11
10,11
10,11
10.0
10.0
20.0
-
-
-
55.0
40.0
80.0
ms
ms
ms
Rx Answer Tone Detectors
Detect threshold (‘Off’ to ‘On)
Undetect threshold (‘On’ to ‘Off’)
Hysteresis
Detect (‘Off’ to ‘On’) response time
Undetect (‘On’ to ‘Off’) response time
Notes
10,12
10,12
10,12
10,12
10,12
Min.
-
-48.0
2.0
30.0
7.0
Typ.
-
-
Max.
-43.0
-
Units
dBm
dBm
dB
ms
ms
-
-
33.0
18.0
45.0
25.0
2100Hz detector
‘Will detect’ frequency
‘Will not detect’ frequency
2050
-
-
-
2160
2000
Hz
Hz
2225Hz detector
‘Will detect’ frequency
‘Will not detect’ frequency
2160
2335
-
-
2285
-
Hz
Hz
Rx Call Progress Energy Detector
Bandwidth (-3dB points) See Figure 8a
Detect threshold (‘Off’ to ‘On)
Undetect threshold (‘On’ to ‘Off’)
Detect (‘Off’ to ‘On’) response time
Undetect (‘On’ to ‘Off’) response time
Notes
Min.
275
-
-42.0
30.0
6.0
Typ.
-
-
Max.
665
-37.0
-
45.0
50.0
Units
Hz
dBm
dBm
ms
10,13
10,13
10,13
10,13
-
36.0
8.0
ms
Receive Input Amplifier
Input impedance (at 100Hz)
Notes
Min.
10.0
Typ.
Max.
Units
Moh
m
Open loop gain (at 100Hz)
Rx Gain Control Block accuracy
10000
V/V
dB
-0.25
+0.25
ã 2004 CML Microsystems Plc
48
D/866/4
CMLMICRO [ CML MICROCIRCUITS ]
