參數(shù)資料
型號: XRT73R06
廠商: Exar Corporation
英文描述: SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述: 六通道線路接口單元E3/DS3/STS-1
文件頁數(shù): 46/68頁
文件大?。?/td> 347K
代理商: XRT73R06
XRT73R06
REV. 1.0.0
á
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
43
6.2.2
When the Digital Loopback is selected, the transmit clock TxClk_n and transmit data inputs (TxPOS_n &
TxNEG_n are looped back and output onto the RxClk_n, RxPOS_n and RxNEG_n pins as shown in Figure 32.
DIGITAL LOOPBACK
6.2.3
With Remote loopback activated as shown in Figure 33, the receive data on RTIP and RRing is looped back
after the jitter attenuator (if selected in receive or transmit path) to the transmit path using RxClk as transmit
timing. The receive data is also output via the RxPOS and RxNEG pins.
REMOTE LOOPBACK
N
OTE
:
Input signals on TxClk, TxPOS and TxNEG are ignored during Remote loopback.
F
IGURE
32. D
IGITAL
L
OOPBACK
F
IGURE
33. R
EMOTE
L
OOPBACK
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxCLK
TxNEG
TxCLK
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
J
A
J
A
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
TRing
TTIP
RRing
RTIP
RxPOS
RxNEG
RxCLK
TxNEG
TxCLK
TxPOS
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
J
A
J
A
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
Tx
Rx
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