[WAVEFORM]
When activated, a change in signal level will produce a trigger:
[SYS] [SETUP TRIGGER] [SETUP WAVEFORM]
. Pick the channel(s) to
set up and how it will trigger:
[SET TYPE / CLASS]
. When more than one
channel will be used for triggering, you can select OR or AND combinations.
Each channel's trigger levels are independent of the other channels. You can use
window triggering (either inside or outside the window), level triggering (above
or below the level), slope triggering (rising, falling or either slope) and slew rate
triggering.
For window, level and slope triggering, percentage values are listed. This
percent value is with respect to the edge-to-edge location on the chart where 0%
is the bottom of the chart, 50% is the middle of the chart and 100% is the top of
the chart. Knowing the signal placement on the chart from analog setup, you can
pick the appropriate percentage level.
See exercises in Section 9 for use of
waveform triggering.
[EXTERNAL]
Allows TTL or switch closure to ground trigger (
see utility port pin-out
).
[CLOCK]
Produces a trigger at pre-defined periods. For example, if it is set to one hour,
then every hour there will be a trigger. Also, you can set a one-time trigger at a
pre-defined date and time.
Once you have set up the analog, data capture and trigger parameters, you can press the
[ARM]
button (near the encoder
wheel) to start a data capture record. The Dash 4u will be ready for the trigger to complete the record.
8. DATA REVIEW
Once a data capture record is complete, several things can be done with the data. It can be reviewed on the color display,
played back to the chart paper, copied to the Zip disk or sent to a computer by ethernet.
[SCREEN PREVIEW]
[MODE] [DATA RECORD REVIEW] [SCREEN PREVIEW]
Part or all of the data can be acted upon. To help decide what part of the data is
of interest, the color display allows preview of the data record.
In the screen preview, there are two cursors (A, B) for selecting data. You can
page forward and backward through the data as well as expand or compress the
time base. The lower part of the display shows the time and amplitude
measurements.
Once you have selected data of interest, you can print the screen to chart paper,
create a .BMP file on Zip disk, archive data to Zip disk, or play out the data to
the chart paper.
[SETUP PLAYBACK]
[MODE] [DATA RECORD REVIEW] [SETUP PLAYBACK]
For playing the data to the chart paper, there is a dedicated set up menu.
Here is where the format for playback is selected (one of the four charts,
numeric, X-Y plot). Also, you can select how much of the data to play back and
whether to compress or expand the timebase.
Throughout the setup of the Dash 4u, you can use the Help sheets to guide you. The System Report and Chart Report
provide much useful information. The manual gives details on the keystrokes to achieve what you want to do with the
Dash 4u. The above lists the basics of the Dash 4u. Under many of the menus are additional choices for more advanced
capabilities of the Dash 4u. Should you require additional assistance, you can contact our Technical Support Department
toll-free at 800-343-4039 or by e-mail: [email protected]
