Rigol DS2000E Series, User Manual, Page: 202 / 283

RIGOL Chapter 10 Waveform Record
10-4 DS2000E User’s Guide
Record Constant On
DS2000E provides record "Open" (record constant on) mode for waveform recording.
When this mode is enabled, the oscilloscope records the waveform continuously
according to the current memory depth. The length of the waveform recorded is
limited by the memory depth (sample rate and horizontal time base) and the
waveform data recorded before will be overwritten by the waveform currently
recorded. In this mode, the other oscilloscope operations (except "Pass/Fail Test",
"Protocol Decoding" as well as "Acquisition Mode" and "Memory Depth" in the
sample system setting and "Time Base Mode" in the horizontal system setting) are
not affected.
Press Utility

Record

Mode and use to select "Open". At this point, the
waveform record key on the front panel turns red and the oscilloscope records
the waveform continuously according to the current memory depth. The oscilloscope
stops recording until users press RUN/STOP and at this point, users can play back
or analyze the waveform.
In constant on mode, the oscilloscope can capture the accidental abnormal signals
during the adjustment. Following is an application example of the record constant on
mode. Use DS2000E (CH1) to observe a pulse which might contain runt pulses.
1.
Connect the pulse under test to CH1 of the oscilloscope. Adjust the oscilloscope
to make it trigger stably.
2. Enable record constant on mode.