HP48 Clock error data results

[Dave Shaffer]

(03-01-2021 10:25 PM)TomC Wrote:  Perhaps the stability of the PLL is the issue - Given the technology of the time (1980s-90s), perhaps it simply is the PLL stability.

Unless HP was cutting unnecessary corners, there was nothing wrong with PLL technology in the 80s

We used PLLs in our radio astronomy receivers for Long Baseline Interferometry, with stabilities at the 1e-14 from the mid-70s onward!