cx28331 Mindspeed Technologies, cx28331 Datasheet - Page 26

• Manufacturer Part Number: cx28331
• Description: Single/dual/triple E3/ds3/sts-1line Interface Unit
• Manufacturer: Mindspeed Technologies

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 (31.6 ) aid in line matching. The driver is presented
with an approximately 150
gain 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.
Mindspeed Proprietary and Confidential
Mindspeed Technologies
Pulse/Power Template for DS3/STS-1
illustrates the Pulse/Power template measurement points for the
DSX
differential load. Driver gain accounts for the 6 dB
DSX
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit
0–450 ft COAX
(type 734/728)
™
CX28331/CX28332/CX28333 (-1x)
0–450 ft COAX
(type 734/728)
28333-DSH-001-A
RX
TX
100604_013