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Input Return Loss 

Figure 7 shows input return loss of the LMH0394 as measured at the BNC on the SD394.  The return loss is 
measured using the Agilent 8722ES VNA with a 75

 BNC to 75

 Type N connector on the input.  Note that return 

loss is layout dependent. 
 

SMPTE LIMIT

 

FIGURE 7.  SD394 Input Return Loss 

 

 

 

 

 

 

SD394 EVK User Guide 

                           6 of 8 

 

Rev 1.2 

                             © 2010, National Semiconductor Corp.  

Summary of Contents for SD394EVK

Page 1: ...SD SDI Adaptive Cable Equalizer Evaluation Kit Contents The EVK contains the following parts SD394EVK board assembly with the LMH0394 cable equalizer SD394EVK User Guide Evaluation Board Description F...

Page 2: ...operation either Pin Mode or SPI Mode must be selected Do not leave JP6 JP9 open FIGURE 2 Pin Mode Select FIGURE 3 SPI Mode Select MUTEREF JP5 JP5 allows control of the MUTEREF function and may be us...

Page 3: ...turn off bypass for normal operation set the jumper to pull BYPASS to GND The BYPASS pin has an internal pulldown to disable bypass so JP2 may be left unconnected for normal operation JP4 allows contr...

Page 4: ...th various Belden 1694A cable lengths The input signal is a 2 97 Gbps PRBS10 and the output signal is measured on the Agilent DCA J 86100C oscilloscope FIGURE 4 SD394 Output Waveform at 2 97 Gbps with...

Page 5: ...5 SD394 Output Waveform at 1 485 Gbps with 200m Belden 1694A Cable FIGURE 6 SD394 Output Waveform at 270 Mbps with 400m Belden 1694A Cable SD394 EVK User Guide 5 of 8 Rev 1 2 2010 National Semiconduct...

Page 6: ...he BNC on the SD394 The return loss is measured using the Agilent 8722ES VNA with a 75 BNC to 75 Type N connector on the input Note that return loss is layout dependent SMPTE LIMIT FIGURE 7 SD394 Inpu...

Page 7: ...1 3M ESD 929665 01 03 I JP3 JP4 JP6 JP7 JP8 JP9 6 Header 3x1 0 1 3M ESD 929647 01 36 I JP5 1 Header 2x1 0 1 3M ESD 929647 01 02 I L1 1 Inductor 5 6nH 0402 Murata LQP15MN5N6B02D PST1 PST2 2 Power Suppl...

Page 8: ...12 SDO 11 SDO 10 VEE SS 9 DAP 17 U2 LMH0394 VCC GND VCC VCC GND ZDIFF100P_1 ZDIFF100N_1 LAYOUT NOTE GND Do not place JP2 JP4 in SPI Mode C5 1UF C1 0 01UF C2 0 01UF C10 0 1UF C12 0 01UF C11 0 1UF J1 B...

Page 9: ...or use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have...

Page 10: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments SD394EVK NOPB...

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