CX28332 Conexant Systems, CX28332 Datasheet - Page 36

• Manufacturer Part Number: CX28332
• Description: (CX28331 - CX28333) Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
• Manufacturer: Conexant Systems

2.0 Functional Description
2.2 Transmitter
2.2.3 Line Driver
Figure 2-3. Pulse Measurement Points
2-4
TX
RX
Pulse/Power Template for E3
0–450 ft COAX
(type 734/728)
0–450 ft COAX
waveform and reduce its high-frequency energy content. This ensures that the
transmit pulse template is met at the cross-connect block, which follows 0–450
feet of transmit-side coaxial cable.
The differential line driver takes the filtered transmit waveform, increases it to the
proper level, and drives it into the transmit magnetics. The two external discrete
back-matching resistors (36 ) aid in line matching. The driver is presented with
an approximately 150
loss in the back-matching resistors.
various data rates.
(type 734/728)
For DS3/STS-1 rates, a pulse-shaper block is used to shape the transmit
Figure 2-3
Pulse/Power Template for DS3/STS-1
illustrates the Pulse/Power template measurement points for the
DSX
Conexant
differential load. Driver gain accounts for the 6 dB gain
DSX
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
0–450 ft COAX
(type 734/728)
0–450 ft COAX
(type 734/728)
CX28331/CX28332/CX28333
RX
TX
100985A
100604_013