AX.25 Modem
CMX7031/CMX7041
AC Parameters (cont.)
DTMF Encoder
Notes
Min.
Typ.
Max.
775
5
Unit
Output Signal Level
Output Level Variation
Output Distortion
–
–
360
0.5
–
mVrms
dB
%
GMSK Encoder
Output Signal Level
Output Level Variation
Output Distortion
3rd Harmonic Distortion
Filter Bt
–
1.0
–
775
0
–
–
0.5
–
+1.0
5
mVrms
dB
%
%
–
3
AFSK Encoder
Output Signal Level
Output Level Variation
–
1.0
–
775
0
–
–
+1.0
5
mVrms
dB
%
%
Hz
Hz
Output Distortion
3rd Harmonic Distortion
Logic 1 Frequency
–
–
3
1198
2118
–
1200
2200
–
1202
2202
40
Logic 0 Frequency
Isochronous Distortion (0 to 1 and 1 to 0)
µs
81
82
83
84
AV = 3.3V.
DD
Notes:
Measured at MOD 1 or MOD 2 output.
AV = 3.3V and Tx Audio Level set to 871mV p-p (308mVrms).
DD
AV = 3.3V.
DD
2013 CML Microsystems Plc
Page 46
D/7031/7041_FI-4.x/5
CMLMICRO [ CML MICROCIRCUITS ]
