Datasheet

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