xrt7295at Exar Corporation, xrt7295at Datasheet - Page 5

• Manufacturer Part Number: xrt7295at
• Description: Xrt7295at -ds3 / Sts-1 Integrated Line Receiver
• Manufacturer: Exar Corporation

SYSTEM DESCRIPTION
Receive Path Configurations
In the receive signal path (see Figure 1), the internal
equalizer can be included by setting REQB = 0 or
bypassed by setting REQB = 1. The equalizer bypass
option allows easy interfacing of the XRT7295AT device
into systems already containing external equalizers.
Figure 3 illustrates the receive path options.
In Case 1 of Figure 3, the signal from the DSX-3
cross-connect feeds directly into R
user should set REQB = 0, engaging the equalizer in the
data path.
Rev.1.20
Transmitter
XR-T7296
System A
IN
. In this mode, the
or STSX-1
Figure 2. Application Diagram
0-450 ft.
DSX-3
Connect
Frame
Cross
5
In Case 2 of Figure 3, external line build-out (LBO) and
equalizer networks precede the XRT7295AT device. In
this mode, the signal at R
on-chip filters should be bypassed by setting REQB=1.
In applications where the XRT7295AT device is used to
monitor DS3 transmitter outputs directly, the receive
equalizer should be bypassed.
Maximum input amplitude under all conditions is 850mV
pk.
Type 728A
Coaxial Cable
0-450 ft.
System B
IN
XRT7295AT
is already equalized, and the
XRT7295AT
Receiver