AIS Baseband IC with/without RF Synthesiser
CMX7032/CMX7042
Marker
1
[T1]
-1.88 dBm
161.97596192 MHz
RBW
VBW
SWT
1
1
kHz
kHz
RF Att
Mixer
Unit
10 dB
-20 dBm
dB
RBW
VBW
SWT
1
1
kHz
kHz
RF Att
Mixer
Unit
20 dB
-20 dBm
dBm
Ref Lvl
Ref Lvl
dBm
-1.9 dBm
150 ms
0
150 ms
1
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1
[T1]
-1.88 dBm
A
A
161.97596192 MHz
LN
LN
1MAX
1SA
1MAX
1SA
61993_25
61993_25
Center 161.9753006 MHz
6
kHz/
Span 60 kHz
Center 161.975 MHz
6
kHz/
Span 60 kHz
Date:
29.AUG.2006 16:09:56
Date:
30.AUG.2006 14:30:14
I/Q Tx spectrum mask
2-point Tx spectrum mask
Delta
1
[T1]
-74.17 dB
99.19839679 kHz
RBW
VBW
SWT
1
1
kHz
kHz
s
RF Att
Mixer
Unit
20 dB
-20 dBm
dBm
RBW
VBW
SWT
1
1
kHz
kHz
s
RF Att
20 dB
-20 dBm
dBm
Ref Lvl
dBm
Ref Lvl
dBm
Mixer
Unit
0
1.25
0
1.25
1
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1
[T1]
[T1]
-1.98 dBm
A
A
161.97449900 MHz
-74.17 dB
LN
LN
1
99.19839679 kHz
1VIEW
2MAX
1SA
2SA
1VIEW
2VIEW
1SA
2SA
61993_25
61993_25
1
Center 161.975 MHz
50 kHz/
Span 500 kHz
Center 161.975 MHz
50 kHz/
Span 500 kHz
Date: 29.AUG.2006 16:04:44
Date: 30.AUG.2006 14:29:11
I/Q wideband spectrum
(lower trace shows un-modulated signal generator)
2-point wideband spectrum
Figure 14 Tx Spectrum Masks
7.7 Reception
The CMX7032/CMX7042 has two receive channels (Rx1 and Rx2) which are capable of receiving AIS
data in either raw mode or burst mode, and either of which may be configured for DSC reception (FSK
1200 baud) in raw or formatted mode. The Rx1 (Input1) and Rx2 (Input2) channels can be configured and
operated independently.
7.7.1 AIS Burst Mode Receive
The operation of receive channel Rx1 in AIS burst mode is described below (the operation of receive
channel Rx2 in AIS burst mode is essentially identical to that of Rx1).
2012 CML Microsystems Plc
38
D/7032/42_FI1.2/13
CMLMICRO [ CML MICROCIRCUITS ]
