|The major test challenges posed by PAM4 signals|
12 August 2015
06 August 2015
|Figure 1: Here is an example of aliasing that results from|
sampling a signal at less than the Nyquist rate of 2fmax
22 July 2015
|Figure 1: Debugging of I2C on a Teledyne LeCroy|
WaveSurfer 3000 oscilloscope
15 July 2015
|PAM4 doubles the number of bits in serial data transmissions|
by increasing the number of levels of pulse-amplitude modulation,
but does so at the cost of noise susceptibility
08 July 2015
|Figure 1: By using exclusion triggering, the oscilloscope|
is prevented from triggering on the normal signal shape.
The trigger is set to capture only pulses with widths
different by at least 15 μs from the typical 325 μs.
On a digital oscilloscope, the persistence display mode is a little like the sustain pedal on a piano. When persistence display is selected, the oscilloscope will trigger, display the signal trace, then trigger again and add another trace to the display, and so on.
25 June 2015
|Figure 1: In this screenshot, four signals are displayed|
on a single grid. Each signal is only using
64 counts of its ADC, which amounts to 6-bit resolution.