Hi, we are considering a V-series scope, I would like to know more about the hardware serial trigger. What data rates are supported? What is the lock range and bandwidth of the hardware CDR?
The V-Series hardware serial trigger supports a wide range of data rates up to 12.5 Gb/s. The data rates include those found in the high speed serial and optical standards. Do you have a specific data rate in mind?
The hardware serial does require a few thousand bits for the PLL to lock to the incoming bit stream, and it is done automatically based on the data rate that has been chosen. Additional equalization is applied to the signal so better lock and recovery is applied by the hardware CDR.
Thanks a lot for the reply.
We also will work with non-standard data rates which are multiples of
(40.0786 MHz +/- 4 kHz).
One such rate will be 5.130 Gb/s +/- 100 ppm.
The hardware serial trigger CDR does have the ability to track a wide range of ppm (up to +/- 5000ppm). It currently does not support 5.13 Gb/s specifically since it's a non-standard data rate, but we can quickly add support for it. Please get in touch with your sales representative to get this request logged.
Thanks a lot again for your help. I did not mention, that we are in a
planning stage (of the next high-end scope) and this question about
hardware serial triggering was brought up by colleagues. LeCroy claims
to support a continuous data range for this feature (8Zi-B models), I'm
not sure of any details or possible tradeoffs.
We can add new rates quickly if you need them, just let us know. We do have some advantages including longer bit pattern trigger (up to 160 bits) and spread spectrum clock (wider ppm) tracking support. If you're working with PRBS patterns, we have the ability to trigger on bit error on the PRBS sequence as well. It provides some rudimentary BER test capability.
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