6-10
IM DLM4038-03EN
Item
Specifications
Horizontal (time) scale
The TIME/DIV knob can be used to set the time per grid division.
For the selectable range, see “Selectable time scale range” in section 6.3, “Time Axis.”
If you change the time scale while the DLM4000 is stopped, you can expand or reduce waveforms
along the time axis.
Roll mode
The DLM4000 switches to roll mode display when the trigger mode is set to Auto, Auto Level, or
Single for the following time scale ranges. For details on the trigger modes, see “Trigger modes” in
section 6.2, “Triggering Section.”
Specified Record Length
Time Scale
1.25 M points or less
100 ms/div to 500 s/div
6.25 M points
500 ms/div to 500 s/div
12.5 M points
500 ms/div to 500 s/div
25 M points
1 s/div to 500 s/div
62.5 M points
5 s/div to 500 s/div
125 M points
5 s/div to 500 s/div
250 M points
10 s/div to 500 s/div
Signal Acquisition and Screen Display
Item
Specifications
Acquisition modes
Normal, Envelope, and Averaging.
Normal: Normal sampling without special processing.
Envelope: From the data sampled at the maximum real-time sample rate, the DLM4000 acquires
the maximum and minimum values for each memory acquisition interval.
Average: Averages normally sampled data over multiple acquisitions. Exponential averaging
is performed when the trigger mode is set to Auto, Auto Level, or Normal, and linear
averaging is performed when the trigger mode is set to Single. The trigger mode is
handled as Normal when N Single is specified. The attenuation constant for exponential
averaging and the linear average count can be set to a value from 2 to 1024 in 2
n
steps.
Averaging cannot be used on logic waveforms. For details on the trigger modes, see
“Trigger modes” in section 6.2, “Triggering Section.”
Sampling modes
Real-time, repetitive, or interpolation sampling. When you use a short time scale that would cause
the sample rate to exceed the real-time sampling maximum sample rate with the specified record
length kept constant, the DLM4000 operates as follows: For the maximum sample rates, see
“Maximum sample rate” in section 6.1, “Signal Input Section.”
Realtime: Achieves the desired time scale by reducing the display record length.
Interpolation: Performs interpolation sampling. If you decrease the time scale further and the upper
limit of the interpolation sampling rate is exceeded, the DLM4000 reduces the display
record length to achieve the desired time scale.
Repetitive: Performs repetitive sampling. If you decrease the time scale further and the upper limit
of the repetitive sampling rate is exceeded, the DLM4000 reduces the display record
length to achieve the desired time scale.
High resolution mode
Improves the analog waveform S/N ratio by combining the high resolution mode and the digital
filter.
Improves the vertical resolution up to 12 bits.
Record lengths
Standard model: 1.25 k points, 12.5 k points, 125 k points, 1.25 M points, 6.25 M points (single ),
12.5 M points (interleave and single)
/M1 option: 1.25 k points, 12.5 k points, 125 k points, 1.25 M points, 6.25 M points (single ),
62.5 M points (interleave and single)
/M2 option: 1.25 k points, 12.5 k points, 125 k points, 1.25 M points, 12.5 M points,
62.5 M points (single), 125 M points (interleave and single)
/M3 option: 1.25 k points, 12.5 k points, 125 k points, 1.25 M points, 6.25 M points, 12.5 M points,
25 M points, 62.5 M points (single), 125 M points (single), 250 M points (interleave and
single)
History
Automatically saves history waveforms (past waveforms that have been acquired using the same
acquisition conditions).
Cannot be used in average mode, repetitive mode, or roll mode. Cannot be used at record lengths
that only allow Single trigger mode.
The maximum number of acquisitions that can be held is as follows:
Standard model: Up to 2500 acquisitions (when the record length is set to 1.25 k points)
/M1 option: Up to 10000 acquisitions (when the record length is set to 1.25 k points)
/M2 option: Up to 20000 acquisitions (when the record length is set to 1.25 k points)
/M3 option: Up to 50000 acquisitions (when the record length is set to 1.25 k points)
6.5 Features
