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XRT7295ATIW Datasheet(PDF) 5 Page - Exar Corporation |
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XRT7295ATIW Datasheet(HTML) 5 Page - Exar Corporation |
5 / 18 page XRT7295AT 5 Rev.1.20 XR-T7296 Transmitter Cross Connect Frame DSX-3 or STSX-1 Type 728A Coaxial Cable 0-450 ft. 0-450 ft. System A XRT7295AT System B Figure 2. Application Diagram Receiver SYSTEM DESCRIPTION Receive Path Configurations In the receive signal path (see Figure 1), the internal equalizer can be included by setting REQB = 0 or bypassed by setting REQB = 1. The equalizer bypass option allows easy interfacing of the XRT7295AT device into systems already containing external equalizers. Figure 3 illustrates the receive path options. In Case 1 of Figure 3, the signal from the DSX-3 cross-connect feeds directly into RIN. In this mode, the user should set REQB = 0, engaging the equalizer in the data path. In Case 2 of Figure 3, external line build-out (LBO) and equalizer networks precede the XRT7295AT device. In this mode, the signal at RIN is already equalized, and the on-chip filters should be bypassed by setting REQB=1. In applications where the XRT7295AT device is used to monitor DS3 transmitter outputs directly, the receive equalizer should be bypassed. Maximum input amplitude under all conditions is 850mV pk. |
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