Reference
Pulse Width Trigger
Use Pulse Width
triggering to trigger on normal or aberrant pulses.
Options Settings Comments
Pulse With Pulse highlighted, triggering
occurs on pulses that meet the trigger
condition de
fined by the Source,
When, and Set Pulse Width options
Source CH1, CH2, CH3
1
,CH4
1
,
Ext, Ext/5
Select the input source as the trigger
signal
When =, ≠,<,>
Select how to compare the trigger
pulse rela
tive to the value selected in
the Pulse Width option
Pulse Widt
h
33 ns to 10.
0sec
Use the mul
tipurpose knob to set a
width
Polarity Positive
, Negative
Select to trigger on positive or
negative pulses
Mode Auto, Normal
Select the type of triggering; Normal
mode is b
est for most Pulse Width
trigger applications
Coupling AC, DC, N oise Reject, H F
Reject, LF Reject
Selects the components of the trigger
signal applied to the trigger circuitry;
(See pa
ge 96, Edge Trigger.)
More Use to switch between submenu
pages
1
Available only o n a 4-channel oscilloscope.
Trigg er Frequency Readout
The oscilloscope counts the rate at which trigger events occur to determine trigger
frequency and displays the frequency in the lower right corner of the screen.
Key Po ints
Trigger When. The pulse width of the source must be ≥5 ns for the oscilloscope to
detect the pulse.
When options Details
=
≠
Triggers the oscilloscope when the signal pulse width is equal to or
not equal to the specified pulse width within a ± 5% tolerance
<
>
Triggers the oscilloscope when the source signal pulse width is less
than or greater than the specified pulse width
TDS2000C and TDS1000C-EDU Series Oscilloscope User Manual 99