53181A Datasheet, PDF (6/19 Pages) Keysight Technologies – Counters

06 | Keysight | 53131A/132A/181A Counters - Data Sheet
For automatic or external arming: (and signals < 100 Hz using timed arming)
LSD displayed:
t _res
Gate time
x
Frequency
or period
RMS resolution:
t
2
res
+ (2 x Trigger error) ²
Gate time
x
Frequency
or period
Typical
53131A _{t res}
650 ps
53132A _{t res}
200 ps
53181A _{t res}
650 ps
See graphs for worst case resolution performance.
N
For automatic arming: Gate time =
Frequency
where N = 1 for standard channel frequency < 1 MHz
4 for standard channel frequency > 1 MHz
128 for optional channel
Systematic uncertainty: ± Time base error ±
t _acc
Gate time
x
Frequency
or period
Typical
Worst case
53131A _{t acc}
350 ps
1.25 ns
53132A _{t acc}
100 ps
500 ps
53181A _{t acc}
350 ps
1.25 ns
Trigger: Default setting is auto trigger at 50%.