XRT83SL216ES Exar, XRT83SL216ES Datasheet - Page 24

• Manufacturer Part Number: XRT83SL216ES
• Description: Peripheral Drivers & Components - PCIs 16 CH E1 LIU SH
• Manufacturer: Exar

Specifications of XRT83SL216ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

XRT83SL216
16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
This applications section describes system considerations along with references to application notes available
for reference where applicable.
The XRT83SL216 supports several loopback modes for diagnostic testing. The following section describes the
local analog loopback, remote loopback, and digital loopback.
With local analog loopback activated, the transmit output data at TTIP/TRING is internally looped back to the
analog inputs at RTIP/RRING. External inputs at RTIP/RRING are ignored while valid transmit output data
continues to be sent to the line. A simplified block diagram of local analog loopback is shown in
F
N
With remote loopback activated, the receive input data at RTIP/RRING is internally looped back to the transmit
output data at TTIP/TRING. The transmit input data at TCLK/TPOS/TNEG are ignored while valid receive
output data continues to be sent to the system. A simplified block diagram of remote loopback is shown in
Figure
F
N
3.0 APPLICATIONS
3.1
3.1.1
3.1.2
IGURE
OTE
IGURE
OTE
: TAOS takes priority over the transmit input data at TPOS/TNEG.
: Remote Loop Back takes priority over TAOS.
16.
15. S
16. S
Loopback Diagnostics
Local Analog Loopback
Remote Loopback
IMPLIFIED
IMPLIFIED
RNEG
TPOS
TNEG
RPOS
TNEG
RPOS
RNEG
TCLK
RCLK
TPOS
RCLK
TCLK
B
B
LOCK
LOCK
D
D
IAGRAM OF
IAGRAM OF
Encoder
Decoder
Decoder
Encoder
L
R
OCAL
EMOTE
JA
JA
JA
JA
A
NALOG
L
OOPBACK
22
Recovery
Data and
Recovery
Data and
Control
Timing
Control
Clock
Timing
Clock
L
OOPBACK
TAOS
TAOS
Tx
Tx
Rx
Rx
TRING
RRING
TTIP
RRING
TRING
RTIP
TTIP
RTIP
Figure
REV. 1.0.0
15.