Other Parts Discussed in Thread: TLK1501,
Hello Tech Support,
Attempting to set up my TLK1501EVM demo board, I've replicated a test scenario from the TLK1501 SERDES EVM Kit Setup and Usage User's Guide. The example I'm using is on pg 2-4 in figure 2-2. The "PRBS_PASS" I/O pin never asserts. I'm powering the EVAL board with 2.5VDC and applying a DC biased CMOS clock at the input of "GTX_CLK." After connecting an oscilloscope to one of the differential pair outputs (TXP), I don't see any activity when I have the EVM set up to produce a pseudorandom bit pattern. I have the EVM wired where the TX+ and Tx- are connected to corresponding RX- and RX+ SMA ports. I also have followed the jumper selection as shown in the example. Thinking there may be an issue with the clock, I've tried applying various clock schemes such as LVPECL & CML with no luck. A CMOS clock seems to best -fit the logic levels as described in the TLK1051 datasheet.
Looking for some advice or direction on what else I can try.
Thank you for your time,
Mike