Datasheet

Equalizer Output
Figure 12 shows the typical output waveform from the LMH0387 equalizer at 2.97 Gbps with 120m Belden 1694A
cable on the input. The input signal is a 2.97 Gbps PRBS10 from the Agilent 86130A BERT. The input is
connected differentially to the SDI SMA inputs on an SD302 eval board with matched 3’ SMA cables. The SD302
output signal is driven through 120m of Belden 1694A cable and received at the BNC_IO input on the SD387. The
SD387 SDO SMA output is connected via a 3’ SMA cable to the 50Ω SMA input on the Tektronix DSA7125
12.5 GHz Oscilloscope.
FIGURE 12. LMH0387 Equalizer Output at 2.97 Gbps with 120m
SD387EVK User Guide 16 of 23
Rev 1.1 © 2010 National Semiconductor Corp.