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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LXT386LE датащи(PDF) 33 Page - Intel Corporation |
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LXT386LE датащи(HTML) 33 Page - Intel Corporation |
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33 / 78 page  QUAD T1/E1/J1 Transceiver — LXT386 Datasheet 33 3.8 G.772 Performance Monitoring The LXT386 can be configured as a quad line interface unit with all channels working as regular transceivers. In applications using only three channels, the fourth channel can be configured to monitor any of the remaining channels inputs or outputs. The monitoring is non-intrusive per ITU- T G.772. Figure 2 on page 8 illustrates this concept. The monitored line signal (input or output) goes through channel 0 clock and data recovery. The signal can be observed digitally at the RCLK/RPOS/RNEG outputs. This feature can also be used to create timing interfaces derived from an E1 or T1 signal. In addition, channel 0 can be configured to a Remote Loopback while in monitoring mode (TCLK0 must be active in order for this operation to take place). This will output the same data as in the signal being monitored at the channel 0 output (TTIP/TRING). The output signal can then be connected to a standard test equipment with a T1/E1 electrical interface for monitoring purposes (non-intrusive monitoring). Figure 12. TAOS Data Path Figure 13. TAOS with Analog Loopback TAOS mode TCLK TPOS TNEG RCLK RPOS RNEG TTIP TRING RTIP RRING * If Enabled MCLK (ALL 1’s) Timing & Control Timing Recovery JA* TTIP TRING RTIP RRING RCLK RPOS RNEG TCLK TPOS TNEG * If Enabled MCLK TAOS Mode Timing & Control Timing Recovery JA* (ALL 1’s) |
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