CMX981 Consumer Microcircuits Limited, CMX981 Datasheet - Page 53

• Manufacturer Part Number: CMX981
• Description: Advanceddigital Radio Baseband Processor (tetra Etc.)
• Manufacturer: Consumer Microcircuits Limited

Transmit Parameters
Advanced Digital Radio Baseband Processor
 2002 CML Microsystems Plc
Input bit rate (2 bits per symbol)
Number of channels
Modulation type
FIR filter sampling rate
DAC output update rate
DAC resolution
Integral accuracy
Differential accuracy
Signal to noise plus distortion
Offset (without adjustment)
Gain matching, I to Q (without adjustment)
Phase matching, I to Q
Storage time
I, Q output level
Adjacent channel power
TETRA Specific Parameters
Gain matching, (I or Q) to ideal Tx
(normalised, 0 - 9kHz)
RRC Roll-off coefficient ( )
Adjacent Channel Power
at MCLK/384 frequency offset
at MCLK/192 frequency offset
at MCLK/128 frequency offset
at MCLK/96 frequency offset
at MCLK/48 frequency offset
at MCLK/20 frequency offset
|H(f)| 0 - 5.85kHz
|H(f)| at 9kHz
|H(f)| at 10.05kHz
|H(f)| at 12.15kHz
at 25kHz frequency offset
at 50kHz frequency offset
at 75kHz frequency offset
at 100kHz frequency offset
at 200kHz frequency offset
at 500kHz frequency offset
at 5MHz frequency offset
Parameter
Notes
53
1
2
3
4
-30.0
Min.
65.0
-0.1
-2.9
-6.6
1.9
MCLK/256
MCLK/64
/4 DQPSK
MCLK/4
-70.0
-78.0
-80.0
-88.0
-90.0
-92.0
-72.0
-80.0
-82.0
-90.0
-93.0
-95.0
Typ.
-104
70.0
0.35
-3.0
-6.8
10.0
2.0
0.0
14
2
Max.
-68.0
-76.0
-78.0
-86.0
-88.0
-90.0
-70.0
-78.0
-80.0
-88.0
-91.0
-93.0
-102
20.0
+0.1
-3.1
-7.0
20.0
0.25
2.1
0.5
0.3
2
1
Degrees
Symbols
Units
LSB
LSB
Bits
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
bps
mV
dB
dB
dB
dB
dB
dB
dB
Hz
Hz
V
CMX981
D/981/1