Tesla,
If you want accurate measurements below a ps then use a SSA.
Oscilloscopes have too much A to D noise and only the very latest have a
timebase accurate enough
to make a meaningful measurement below a few picoseconds.
Research it, Frequency domain measurements are orders of magnitude
better than Time domain measurements.
Some of the Higher end N@'s can measure IPN directly, like the R&S FSV-K40
They have a tool on their website that will take your S@ spot
measurements and convert themto the time domain.
AGilent makes a decent phase noise system, E5052B. (85k to 135K)
BNC has a PC based box that performs about the same as the E5052B for
under 35k.
Use a 2:1 balun if measuring differential signals.
(At Sun we verified our SERDES measurements from the BERT with the
101010 pattern, measured on the SSA,
Aeroflex PN9500).
Good Luck
-Bill
On 2/18/2016 1:19 AM, Tesla wrote:
Hi Experts
I am curious about a idea using spectrum analyzer to measure the RMS jitter
of serdes. Because we do not have a high enough bandwidth scope.
For low frequency clock, we can use spectrum method to measure the RMS jitter
of clock source. Suppose we let the Serdes is outputing 101010.... clock
pattern. Can the RMS jitter be measured using spectrum analyzer like low
frequency clock?
Thanks a lot for your advice.
Tesla------------------------------------------------------------------
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