User manual

79
UNI-T
®
UT4000 User Manual
Trigger
Trigger sensitivity
≤ 1 div
Internal ± 8 div from the centre of the
screen
EXT ± 3V
Trigger level range
EXT/5 ± 15V
Internal ± (0.3 div x V/div) (within ± 4
div from the centre of the
screen)
EXT ± (6% default value + 40mV)
Trigger level accuracy
(Typical) applied on signals
of ≥20ns rise or fall time
EXT/5 ±(6% default value + 200mV)
Pretrigger capability
N
ormal mode/scanning mode, pretrigger/delayed trigger.
Pretrigger depth is adjustable.
Holdoff range 100ns – 1.5s
Set level to 50% (Typical) Input signal frequency ≥50Hz
Edge Trigger
Edge type Rise, Fall, Rise and Fall
Pulse Trigger
Trigger mode (Greater than, less than, or equal to) positive pulse; (Greater
than, less than, or equal to) negative pulse.
Pulse width range 20ns – 10s
Video Trigger
Internal 2 div peak-to-peak
EXT 400mV
Trigger sensitivity (video
trigger, typical)
EXT/5 2V