Datasheet

Typical Performance
Cable Driver Output
Figure 11 shows the typical output waveform from the LMH0387 cable driver at 2.97 Gbps. 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
the SD387 with matched 3’ SMA cables. The LMH0387 cable driver slew rate is set for HD/3G mode (SD/HD
¯¯¯
= 0).
The SD387 BNC_IO output is connected through 1m of Belden 1694A cable to the TCA75 75Ω input module on the
Tektronix DSA7125 12.5 GHz Oscilloscope.
FIGURE 11. LMH0387 Cable Driver Output at 2.97 Gbps
SD387EVK User Guide 15 of 23
Rev 1.1 © 2010 National Semiconductor Corp.