6

Fig.5 Gain vs Input Level (16kbit/s)

Input Level (dBm0)

- 30

- 20

- 10

0

10

15

20

Ref: 0dBm0 Input Level = 489mVrms

Input Frequency = 800Hz

5

0

0

1

- 1

2

3

- 2

- 3

10

0

- 10

- 20

- 30

Input Level (dBm0)

0dBm0 Input Level = 489mVrms

Input Frequency = 800Hz

Ref Level: -15dBm0 = 87mVrms

ref.

13

Input Level (dBm0)

- 30

- 20

- 10

0

20

15

Ref: 0dBm0 Input Level = 489mVrms

Input Frequency = 800Hz

25

Frequency (kHz)

- 50

- 40

- 30

- 20

- 10

0

+ 10

- 60

01

2

3

4

5

6

0.3

2.6

1.5

1.5

Input Level = -15dBm0

0.8

ref.

4.2

Fig.6 Gain vs Input Level (32kbit/s)

Fig.7 S/N vs Input Level (16kbit/s)

Fig.8 S/N vs Input Level (32kbit/s)

Fig.9 Attenuation Distortion vs Frequency (16kbit/s)

0

1

- 1

2

3

- 2

- 3

10

0

- 10

- 20

- 30

Input Level (dBm0)

0dBm0 Input Level = 489mVrms

Input Frequency = 800Hz

Ref Level: -15dBm0 = 87mVrms

ref.

13