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参数资料
型号： WJLXT384LEB1
厂商： CORTINA SYSTEMS INC
元件分类： 数字传输电路
英文描述： DATACOM, PCM TRANSCEIVER, PQFP144
封装： 20 X 20MM, ROHS COMPLIANT, LQFP-144
文件页数： 105/140页
文件大小： 1514K
代理商： WJLXT384LEB1
67
Document Number: 248994
Revision Number: 005
Revision Date: November 28, 2005
Intel LXT384 Octal T1/E1/J1 S/H PCM Transceiver with JA
6.9
Performance Monitoring
The LXT384 Transceiver can be set for either one of the following configurations:
All eight channels 0 through 7 operating as regular transceivers
Channels 1 through 7 operating as regular transceivers and the channel 0 transceiver
configured for non-intrusive performance monitoring of one of the other channels, per ITU-T
G.722
The LXT384 Transceiver can be configured to monitor the performance of either (1) one of the
line-side receivers 1 through 7 or (2) one of the line-side transmitters 1 through 7. The
configuration can be performed using either the Hardware mode (see Table 14 in Section 5.7,
“Signal Loss and Line-Code-Violation Signals”) or the Host Processor mode (see Table 39 in
Chapter 8.0, “Registers”).
Performance Monitoring through Clock and Data Recovery. Performance monitoring of either
(1) analog inputs to channels 1 through 7 or (2) analog outputs from any one of channels 1 through
7 can be accomplished through clock and data recovery as follows.
1. As shown in Figure 1 in Chapter 2.0, “Product Summary”, the analog input from the channel
selected for monitoring is processed by the channel 0 transceiver clock and data recovery.
2. The line signal from the channel selected can then be observed digitally at RCLK0/RPOS0/
RNEG0. Channel 0 displays the appropriate LOS state for the line signal of the channel
selected, both in transmit and receive directions.
Performance Monitoring through Remote Loopback. Performance monitoring of either
(1) analog line inputs RTIP/RRING to any one of channels 1 through 7 or (2) analog line outputs
TTIP/TRING from any one of channels 1 through 7 can be accomplished through remote loopback
as follows:
1. Configure the LXT384 Transceiver as shown in Figure 10 in Section 6.7.3, “Remote
Loopback”. (TCLK must be active for remote loopback to operate.)
2. The monitored channel and channel 0 output the same data. By connecting the channel 0
output data (TTIP0/TRING0) to standard test equipment, the line signal from the channel
selected can be monitored.
Note:
A benefit of performance-monitoring is that the monitored signal can be sent to channel 0, where it
can be used as a timing reference clock.
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