1. Introduction SM20 is a serial digital interface (SDI) distribution amplifier module supporting 3G-SDI, HD-SDI and SDI standards. The SDI input is equalized and re-clocked to provide four buffered outputs. SM20 requires 5VDC which is provided via the supplied AC-DC converter.
Connect the 5VDC jack from the adaptor to the +5VDC ‘Power in’ socket on the SM20. Connect an SDI video input to the ‘SDI In’ BNC – SM20 supports SMPTE 259M, SMPTE 292M, SMPTE 296M, SMPTE 372M and SMPTE 425M standards. Any or all of the four ‘SDI Out’ BNCs may be connected.
The +5VDC from the AC/DC power adaptor is filtered and protected from over-range or reverse polarity inputs by a resettable fuse. This fuse will protect the SM20 until the out-of-range condition is removed when it automatically reset itself. The 5VDC input is then regulated to provide a ‘clean’...
Appendix A: AC-DC adaptor The specification for the supplied AC-DC adaptor is shown in Figures 5-7. Figure 5 Power supply specification – Page 1. SM20 User Manual Revision 0.1 Page 9 of 11...
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