What is inside the Keysight M8196A 92 GSa/S Arb?

[TheUnnamedNewbie]

Hi guys,

I am aware of very fast ADC architectures, and how once you get past say a few GSa/S you tend to start time-interleaving to go higher. Higher still you often work with mixing to get more samples (such as in the teledyne 100 GHz scope). But I am not that familar when it comes to DACs, and from what I can tell, the keysight M8196A is one of the fastest DACs on the market right now (or at least contains?). Does anyone have any idea what makes these things tick? What special-sauce they use to get these sample rates? (InP? GaAs?).

https://www.keysight.com/en/pd-2583267-pn-M8196A/92-gsa-s-arbitrary-waveform-generators?nid=-33319.1139580&cc=BE&lc=dut

[0xfede]

I don't know for sure, but a quick look on google and IEEE shows some papers of ultra fast DACs (up to 100-Gs/s) using SiGeC or InP HBTs.
Can't ever imagine one of these ARB in my lab...

Best,
0xfede