參數(shù)資料
型號(hào): XRT73L02MIV
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PQFP100
封裝: 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, QFP-100
文件頁(yè)數(shù): 43/46頁(yè)
文件大?。?/td> 391K
代理商: XRT73L02MIV
xr
XRT73L02M
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
41
8.2.2
The Digital Loopback function is available either in Hardware mode or Host mode. When the Digital Loopback
is selected, the transmit clock (TxClk_n) and transmit data inputs (TPOS_n & TNEG_n) are looped back and
output onto the RxClk_n, RPOS_n and RNEG_n pins as shown in Figure 27. The data presented on TxClk,
TPOS and TNEG are not output on the TTIP and TRING pins.This provides the capability to configure the pro-
tection card (in redundancy applications) in Digital Loopback mode without affecting the traffic on the primary
card.
DIGITAL LOOPBACK:
N
OTE
:
Signals on the RTIP_n and RRING_n pins are ignored during digital loop back.
I
8.2.3
With Remote loop back activated as shown in Figure 28, 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 RPOS and RNEG pins.
REMOTE LOOPBACK:
F
IGURE
25. A
NALOG
L
OOPBACK
F
IGURE
26. D
IGITAL
L
OOPBACK
TRING
TTIP
RRING
RTIP
RPOS
RNEG
RCLK
TNDATA
TCLK
TPDATA
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
J
A
J
A
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
1
if enabled
2
if enabled and selected in either Receive or Transmit path
Tx
Rx
1
1
TRING
TTIP
RRING
RTIP
RPOS
RNEG
RCLK
TNDATA
TCLK
TPDATA
HDB3/B3ZS
ENCODER
HDB3/B3ZS
DECODER
J
A
J
A
TIMING
CONTROL
DATA &
CLOCK
RECOVERY
1
if enabled
2
if enabled and selected in either Receive or Transmit path
Tx
Rx
1
1
相關(guān)PDF資料
PDF描述
XRT73L02 2 Channel E3/DS3/STS-1 Line Interface Unit(2通道 E3/DS3/STS-1線接口單元)
XRT73L03A 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03AIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03B 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
XRT73L03BIV 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT
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