HP 54645A - HP 54645 A;D Time Base

HP 54645A/D Time Base
Range 2 ns/div to 50 s/div (HP 54645A)
5 ns/div to 50 s/div (HP 54645D)
Resolution 40 ps
Vernier 1-2-5 increments when Off, 25 minor increments
between major settings when On
Reference Positions Left, Center, Right
Random Repetitive Stop freezes display
Pan and Zoom (Random Repetitive) Shows only 1 trigger
Delay Range
Pre-trigger (negative delay)
Post-trigger (positive delay)
1 screen or 2.5 ms (the greater running repetitively)
500 seconds
Scope delta t accuracy
Same channel
Channel-to-Channel
(non-vernier ranges)
± 0.01% reading ± 0.2% screen width ± 40 ps
± 0.01% reading ± 0.2% screen width ± 80 ps
Logic delta t accuracy
Same channel
Channel-to-channel
(non-vernier ranges)
± 0.01% reading ± 0.2% screen width ± (1 logic
sample period, 2.5 or 5 ns) ± chan-to-chan skew
± 0.01% reading ± 0.2% screen width ± (1 logic
sample period, 2.5 or 5 ns) ± chan-to-chan skew
Delay Jitter 10 ppm
RMS Jitter 0.025% screen width + 100 ps pp
Entrance to Delayed Sweep Not allowed when using any analog channels and
> 8 digital channels.
Performance Characteristics
HP 54645A/D Time Base
9-6