4 ms·
But you can't use equivalent-time sampling for something non-repetitive like network packets.
by Retr0id 8mo ago
But you can't use equivalent-time sampling for something non-repetitive like network packets.
- Aurornis 8mo agoFor measurements like this the SDK will usually include some utilities to send the same data over and over on a port.
- guenthert 8mo agoEven if it's the same data, the bit stream will be a variety of 0 and 1s. The period of that waveform will then be 1 frame length / data transfer rate (or rather 1/4 frame length / data transfer rate as this is a QSGMII link). I wonder how the scope triggers on that. Trigger criterium would be a bit pattern, say the Ethernet frame preamble of 7 octects (* 10/8) spread across four streams ... Otoh, at 5Gbps, a sample rate of "just" 10GS/s would be sufficient (barely). I rather suspect the oscilloscope is capable of 1TS/s equivalent time sampling, but that mode wasn't used.