參數(shù)資料
型號(hào): XRT5997
廠商: Exar Corporation
英文描述: Seven-Channel E1 Line Interface Unit(7通道 E1線接口單元)
中文描述: 七通道E1線路接口單元(7通道素E1線接口單元)
文件頁數(shù): 21/37頁
文件大小: 367K
代理商: XRT5997
XRT5997
21
Rev. 1.0.0
TxPOS _x
TxNEG _x
TxClk _x
Data 1 1 0 1 1 0
1
Bit
Period
RZ Pulse is to be
applied in the first
half of the bit-period
No pulse is to be applied
in the second half of the
bit period
No Activity in
TxClk Line
Figure 3. Illustration on how the Terminal Equipment should apply data to the “Transmit Section” of a
given Channel (within the XRT5997 Device), when operating in the “Clockless” Mode
Figure 3, indicates that when the user is operating a
channel in the “Clockless” Mode, then the correspond-
ing Terminal Equipment must do the following:
Not apply a signal on the “TxClk_x” line.
When applying a pulse (to either the TxPOS_x or
TxNEG_x input pin), apply an RZ pulse to the
appropriate input pin. This RZ pulse should only
have a width of one-half the bit-period. Addition,
the RZ pulse should occupy only the first half of
the bit-period. The TxPOS_x and TxNEG_x input
pins must be at 0V, during the second half of
every bit-period.
1.3
The Pulse Shaping Circuit
The purpose of the “Transmit Pulse Shaping” circuit is
to generate “Transmit Output” pulses that comply with
the ITU-T G.703 Pulse Template Requirements for E1
Applications.
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