Figure 9. LMH0307 Register Display
The Load and Save buttons provide a handy mechanism for restoring or saving the register set external to the
evaluation board.
Cable Driver Output Waveform
Test Conditions
The SDO0 output of the LMH0307 on the SD307 is observed in the following example. The input signal is a 2.97
Gbps PRBS10 from the Agilent 86130A 3.6G BERT. The input signal is connected differentially to the SDI SMA
inputs on the evaluation board with matched 3’ SMA cables. The LMH0307 is running in HD/3G mode (SD/HD=0).
The SDO0 output is connected through 1m of Belden 1694A cable to the TCA75 input module on the Tektronix
DSA 71254 12.5 GHz Oscilloscope. SDO0
¯¯¯¯¯ is terminated with a 75
Ω
BNC terminator.
Test Results
Figure 8 shows the typical SDO0 output waveform from the LMH0307.
SD303/SD307 EVK User Guide
14 of 27
Rev 1.2
© 2010, National Semiconductor Corp.
