Fluke 225C Getting Started Guide - Page 16

Trigger Point, Trigger Delay, AUTO TRIG, AUTO LEVEL, MANUAL, 12V 1.2V, EDGE TRIG, LEVEL

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Fluke 19xC-2x5C Getting Started Select trigger level control: • at automatic triggering via input A or B (AUTO TRIG): AUTO LEVEL : automatic level control. MANUAL : manual level control. • at triggering via the meter input (Ext): 0.12V 1.2V : select level 0.12V or 1.2V. • at triggering on edges via input A or B (EDGE TRIG, see F4 below): LEVEL : adjust the level manually. Use to adjust the trigger level. Select trigger options: „ Automatic... : automatic triggering on signals >1 Hz or > 15 Hz (faster). „ On Edges... : turns off automatic triggering and opens the Trigger on Edge menu: Update: (screen update) □ Free Run : the test tool updates the trace even if there are no triggers. □ On Trigger : the screen is updated only when valid triggers occur. 12 □ Single Shot : the test tool waits for a trigger. After receiving a trigger, the waveform is displayed and the instrument is set to HOLD. Press to arm for a new trigger. Noise reject Filter: the noise reject filter reduces jitter on the screen when triggering on noisy waveforms. NCycle: Each Nth trigger results in a trace update. „ Video on A... : enables triggering on video signals (input A only). Pulse Width on A... : enables triggering on qualified pulses (input A only). Trigger Point, Trigger Delay The trigger icon shows the trigger point. Initially you have two divisions of pre-trigger view (negative delay). To change the trigger delay, do the following: Hold down to adjust the trigger delay. If you move the trigger icon to the left of the screen, it changes to . The status at the bottom of the screen shows for example: The 500ms indicates the (positive) delay between the trigger point and the waveform display.

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Fluke 19xC-2x5C
Getting Started
12
Select trigger level control:
•
at automatic triggering via input A or B
(
AUTO TRIG
):
AUTO LEVEL :
automatic level control.
MANUAL
: manual level control.
•
at triggering via the meter input (
Ext
):
0.12V 1.2V
: select level 0.12V or 1.2V.
•
at triggering on edges via input A or B
(
EDGE TRIG
, see F4 below):
LEVEL
: adjust the level manually.
Use
to adjust the trigger level.
Select trigger options:
Automatic...
: automatic triggering on
signals >1 Hz or > 15 Hz (faster).
On Edges...
: turns off automatic triggering
and opens the
Trigger on Edge
menu:
Update:
(screen update)
□
Free Run
: the test tool updates the
trace even if there are no triggers.
□
On Trigger
: the screen is updated
only
when valid triggers occur.
□
Single Shot
: the test tool waits for a
trigger. After receiving a trigger, the
waveform is displayed and the
instrument is set to HOLD.
Press
to arm for a new trigger.
Noise reject Filter:
the noise reject filter
reduces jitter on the screen when
triggering on noisy waveforms.
NCycle:
Each N
th
trigger results in a trace
update.
Video on A...
: enables triggering on video
signals (input A only).
Pulse Width on A...
: enables triggering on
qualified pulses (input A only).
Trigger Point, Trigger Delay
The trigger icon
shows the trigger point. Initially you
have two divisions of pre-trigger view (negative delay).
To change the trigger delay, do the following:
Hold down to adjust the trigger delay.
If you move the trigger icon to the left of the screen, it
changes to
. The status at the bottom of the screen
shows for example:
The 500ms indicates the (positive) delay between the
trigger point and the waveform display.