Tektronix CSA8000B - Manual (Page 68)

System Overview Maps
2- 6 CSA8000B & TDS8000B User Manual
Process Overview Map
Process overview Process block description
Idling... Reset
Abort
Power On
1 Yes
1. The instrument starts in the idle state; it enters this state
upon power up, upon receiving most control setting changes,
or upon finishing acquisition tasks.
Implement
setup
Stop
condition?
No
2. When you toggle its RUN/STOP control to RUN, the
instrument implements its setup based on the current
control settings (upon start up, these are default or last
setup depending on user-set preferences).
Wait for trigger/
accept trigger
3. The instrument then begins waiting for a trigger. No sampling
takes place until triggering criteria are met or a free-run
trigger is forced (Auto-trigger mode only). The instrument
accepts trigger.
Wait Delay time
Add one
l i t l
4. The instrument then waits a delay time, that is, it delays
taking a sample until a specified time elapses, where:
Delay time = Horizontal Pos. + Ch. Deskew + N sample intervals
In the above calculation, N = Current sample count -- 1
For example, if taking the 6
th sample in the waveform record,
5 sample intervals are added.
Take 1 sample
per active
sample interval
to Delay time
5. The instrument takes one sample for each waveform record
(channel) for each active (on) timebase. This instrument
sequentially samples: one sample is taken per trigger for
each active channel in each displayed timebase.
Waveform
No
per active
channel
6. If averaging or enveloping is on, each record becomes part of
a multi-acquisition record that these modes produce (see
page 3--22). The process loops back to step 3 above to
acquire additional records until the number of acquisitions
required for the acquisition mode currently set are processed,
and then processing continues as for step 8 below.
Waveform
record
complete?
No
Yes
7. If FrameScan mode is on, the acquisition process is
modified. See FrameScan Acquisitions on page 3--30 for
information on how FrameScan works.
1
Note: if acquiring when powered down, the oscilloscope may skip the
idle state and resume acquisition starting with step 3.
Waveform
available
8. At this point the acquisition record is in channel acquisition
memory and is available to the instrument for measurement
of its parameters, display, output, and so on.
The instrument then checks for user-specified stop condition
and either returns to its idle state or continues at step 3,
according to what it finds.