z02215 ZiLOG Semiconductor, z02215 Datasheet - Page 54

• Manufacturer Part Number: z02215
• Description: Single Chip Modem With Integrated Controller, Data Pump, And Analog Front End
• Manufacturer: ZiLOG Semiconductor

Transmitted Data Spectrum
Active Hybrid Circuit and Relay Driver
PS001907-0904
Configuration
V.22 bis 2400
V.22 bis 1200
V.22 1200
V.23 1200/75
V.21
Bell 212A
Bell 103
Bell 202/ Bell
202T 1200/150
Notes:
Mode
V.22
V.22bis
Bell 212A
Note: The carrier and the spectral shaping are selected automatically according to the Configuration.
1. QAM is Quadrature Amplitude Modulation FSK is Frequency Shift Key
2. Tone is Single or Dual Tone (DTMF), TM is Trellis Modulation, DPSK is Dual Phase Shift Keying
Table 9. Selectable Configurations
The transmitted data spectrum, with compromised equalization disabled, is
shaped in the baseband of the Finite Impulse Response (FIR) filter. Table 10
reflects the spectrum characteristics.
Table 10. Spectral Shaping
An active hybrid circuit is added to the Analog Front End (AFE) of the Z02215 to
improve the received signal quality level by 20dB and to improve the modem per-
formance. The on-chip active hybrid reduces system level costs by reducing the
Modulation
QAM
DPSK
DPSK
FSK
FSK
DPSK
FSK
FSK
Carrier Freq
1200/2400
1200/2400
1200/2400
Single Chip Modem with Integrated Controller, Data Pump, and AFE
1,2
Carrier
Frequency
1200/2400
1200/2400
1200/2400
1700/420
1080/1750
1200/2400
1170/2125
1700/437
Spectral Power Shaping Function
square root 75% Raised Cosine at 600 baud
square root 75% Raised Cosine at 600 baud
square root 75% Raised Cosine at 600 baud
Data Rate
(bps)
2400
1200
1200
1200/75
300
1200
300
1200/150
Symbol
Rate
(baud)
600
600
600
1200/75
300
600
300
1200/150 1
Bits
Per
Symbol
4
2
2
1
1
2
1
Transmitted Data Spectrum
Constellation
Points
16
4
4
–
–
4
–
–
Z02215
48