參數(shù)資料
型號(hào)： XRT82L38
廠商： Exar Corporation
英文描述： Octal E1/T1/J1 Line Transceiver with Clock Recovery and Jitter Attenuator(八 T1/E1/J1線收發(fā)器（帶時(shí)鐘恢復(fù)和振蕩衰減器）)
中文描述： 八進(jìn)制E1/T1/J1線收發(fā)器時(shí)鐘恢復(fù)和抖動(dòng)衰減器（八的T1/E1/J1線收發(fā)器（帶時(shí)鐘恢復(fù)和振蕩衰減器））
文件頁(yè)數(shù)： 19/54頁(yè)
文件大?。?/td> 356K
代理商： XRT82L38
XRT82L38
OCTAL E1/T1/J1 LINE TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
PRELIMINARY
REV. P1.0.5
17
TPOS/TDAT and TNEG input pins are ignored, while
RxClk and received data will continue to be available
at their respective output pins. Simultaneously setting
RLOOP and ALOOP active is not allowed (see Loop-
Back Mode in Figure 3 & Figure 4). Remote loop-
back has priority over TAOS.
DIGITAL LOOP-BACK (DLOOP)
The Digital Local Loop-Back mode allows the trans-
mit clock and data to be looped back to the corre-
sponding receiver output pins through the encoder/
decoder and the jitter attenuator. In this mode, the re-
ceive line signal is ignored, but the transmit data will
be sent to the line uninterrupted. This loop back fea-
ture allows users to configure the line interface as a
pure jitter attenuator. (see Loop-Back Mode in
Figure 5 & Figure 6).
N
OTE
:
Digital Local Loop-Back is not supported in Hard-
ware Mode.
ANALOG LOOP-BACK (ALOOP)
With Analog Local Loop-Back activated, the transmit
data at TTIP and TRING are looped-back to the ana-
log input of the receiver. External inputs at RTIP/
RRING in this mode are ignored while valid transmit
data continues to be sent to the line. Analog Loop-
Back exercises most of the functional blocks of the
line interface (see Loop-Back Mode in Figure 7 &
Figure 8).
F
IGURE
3. R
EMOTE
L
OOP
-B
ACK
WITH
JITTER
ATTENUATOR
SELECTED
IN
RECEIVE
PATH
Tx
Decoder
Timing
Control
Rx
Clock &
Data
Recovery
JA
TxPOS
TxNEG
TxClk
RxClk
RxPOS
RxNEG
Encoder
TTIP
TRing
RTIP
RRing
F
IGURE
4. R
EMOTE
L
OOP
-B
ACK
WITH
JITTER
ATTENUATOR
SELECTED
IN
TRANSMIT
PATH
Tx
Decoder
Timing
Control
Rx
Clock &
Data
Recovery
JA
TxPOS
TxNEG
TxClk
RxClk
RxPOS
RxNEG
Encoder
TTIP
TRing
RTIP
RRing
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