5-8
IM 710105-03E
Item
Specifications
Logic channel threshold
level preset
You can choose from the following preset threshold level settings.
CMOS (5V) = 2.5 V, CMOS (3.3V) = 1.65 V, CMOS (2.5V) = 1.25 V, CMOS (1.8V) = 0.90 V,
ECL = -1.30 V
Deskewing
The waveform display position can be adjusted for CH1 to CH4
1
and LOGIC
2
separately.
Trigger skew cannot be adjusted.
Logic waveforms can be adjusted at the pod (8-bit) level. Adjustment at the bit level is not possible.
The adjustable range is ±100 ns in 0.01-ns steps.
Horizontal position setting
Horizontal position knob can be used to set the trigger position and trigger delay.
What the knob controls is indicated by the DELAY key LED.
LED off: Trigger position
LED on: Trigger delay
For trigger position and trigger delay specification details, see "Trigger position" or "Trigger delay" in
section 5.2, "Triggering Section."
Delay cancelling
You can select whether or not to apply the specified delay to the time measurement values.
ON:
Measures time with the trigger position set to 0 s (does not apply the delay to time
measurement).
OFF:
Measures time with the trigger point set to 0 s (applies the delay to time measurement).
Time scale setting
The TIME/DIV knob can be used to set the time scale.
For the selectable range, see "Selectable time scale range" in section 5.3, "Time Axis."
If you change the time scale while the DLM2000 is stopped, you can expand or reduce waveforms
along the time axis.
Roll mode
The DLM2000 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 5.2, "Triggering Section."
1.25 M points or less: 100 ms/division to 500 s/division
6.25 M points:
500 ms/division to 500 s/division
12.5 M points:
500 ms/division to 500 s/division
25 M points:
1 s/division to 500 s/division
62.5 M points:
5 s/division to 500 s/division
125 M points:
5 s/division to 500 s/division
250 M points:
10 s/division to 500 s/division
1 CH1 and CH2 on the DLM2022, DLM2032, and DLM2052.
2 Logic only available on the DLM2024, DLM2034, and DLM2054.
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 DLM2000
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
set to Normal for N Single. 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 5.2, "Triggering Section."
Sampling modes
You can select real-time, repetitive, or interpolation sampling mode. 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 DLM2000 operates as follows:
For the maximum sample rates, see "Maximum sample rate" in section 5.1, "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 DLM2000 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 DLM2000 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.
5.5 Features
