FX629 Datasheet, PDF (7/10 Pages) CML Microcircuits – Delta Modulation Codec

Typical Codec Performance ...... relative to the Mil-Std-188-113 Specification
Input Level = -15dBm0
20
15
10
5
0
1
2
3
Input Frequency (kHz)
Fig.10 S/N vs Input Frequency (16kbit/s)
30
Input Level = -15dBm0
25
20
15
10
5
0
1
2
3
3.4
Input Frequency (kHz)
Fig.11 S/N vs Input Frequency (32kbit/s)
0
-6
- 12
- 6dB/octave
- 18
- 24
- 30
10
100
1k
10k
Frequency (Hz)
Fig.12 Principal Integrator Response
100
30% 'run-of-threes
90.0
Beginning of
48.0
discharge
10.0
0%
'run-of-threes
3.0
X
Fig.13 Compand Envelope
X
Time (ms)
+ 10
3
01
2
- 10
- 20
Input Level = -15dBm0
- 30
- 40
- 50
- 60
0
0.3
1
1.4
2
Fig.14 Attenuation Distortion vs Frequency (32kbit/s)
7
2.6
3 3.4
4 ^4.2
5
6
Frequency (kHz)