DS90CR483_04 Datasheet, PDF (17/22 Pages) National Semiconductor (TI) – 48-Bit LVDS Channel Link SER/DES - 33 - 112 MHz

Typical Data Rate vs Cable Length Curve
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DATA RATE VS CABLE LENGTH TEST PROCEDURE
The Data Rate vs Cable Length graph was generated using National Semiconductor’s CLINK3V48BT-112 Evaluation Kit and
3M’s Mini D Ribbon (MDR) Cable under typical conditions (Vcc = 3.3V, Temp = +25˚C). A Tektronix MB100 Bit-Error-Rate Tester
(BERT) was used to send a PRBS (2¹⁵) pattern to 32 of the 48 input channels on the transmitter (DS90CR483). The BERT was
also used to monitor the corresponding 32 receiver (DS90CR484) output channels for bit errors. The frequency of the input signal
were increased until bit errors were reported on the BERT. The frequency on the graph is the highest frequency without error.
Results:
The DS90CR483/4 link was error free at 100MHz over 10 meters of 3M cable using pre-emphasis and DC balance mode off.
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