YOKOGAWA DL6000 Series User Manual

7-4
IM DLM6054-01EN
Real-time Sampling Mode (Realtime)
When you change the time axis setting, the sample rate changes. You can sample data at a
maximum sample rate of 2.5 GS/s.
1
(The maximum sample rate is 5 GS/s when Interleave mode is
on.)
2
In this mode, the DL6000/DLM6000 can only display waveforms whose frequency is up to one-
half the sample rate, in accordance with the sampling theorem.
3
Therefore, this mode is suitable for
observing waveforms whose frequency is lower than one-half the sample rate.
1
On the DL6054, DL6104, DLM6054, and DLM6104 (1.25 GS/s in high resolution mode). On the
DL6154, the sample rate is 5 GS/s (2.5 GS/s in high resolution mode).
2
On the DL6054, DL6104, DLM6054, and DLM6104 (2.5 GS/s in high resolution mode). On the
DL6154, the sample rate is 10 GS/s (5 GS/s in high resolution mode).
3
If the sample rate is comparatively low with respect to the input signal frequency, the harmonics
contained in the signal are lost. When this happens, some of the harmonics will be misread as low-
frequency waves due to the effects described by the Nyquist sampling theorem. This phenomenon
is called aliasing. You can avoid aliasing by acquiring waveforms with the acquisition mode set to
Envelope.
Interpolation Mode (Interpolation)
The DL6000/DLM6000 interpolates the data sampled at 2.5 GS/s up to 1000 times (2000 times in
High Resolution mode) using the (sinx)/x function.
1, 2
This essentially increases the sample rate to
up to 2.5 TS/s.
Interpolation mode is effective for single-shot signals. If the input signal frequency is high relative to
the sample rate (2.5 GS/s here), aliasing may occur.
1
1
This sample rate applies to the DL6054, DL6104, DLM6054, and DLM6104. For the DL6154, the
sample rate is 5 GS/s.
2
These interpolation numbers apply to the DL6054, DL6104, DLM6054, and DLM6104. For the
DL6154, the maximum number of interpolations is 500 (1000 in High Resolution mode).
Repetitive Sampling Mode (Repetitive)
In this mode, one waveform is created from several cycles of a repeating signal. This is equivalent
to sampling the signal at a higher sample rate than the actual sample rate. The equivalent sample
rate is 2.5 TS/s maximum.
The DL6000/DLM6000 uses random sampling, which takes ad
vantage of the fact that the time
difference between the trigger point and sampled points is random. The DL6000/DLM6000 realigns
the trigger point each time it acquires a waveform.
This mode is ef
fective for repeating signals, and aliasing rarely occurs.
Display record length
Acquisition mode
Sample rate
Sampling mode (IntP: Interpolation, Rep: Repetitive Sampling)
Note
• Even if Interpolation or Repetitive Sampling mode is selected, the DL6000/DLM6000 runs in real-time
sampling mode when the sample rate is less than or equal to 1.25 GS/s,
1
or 2.5 GS/s when Interleave
mode is on.
2
When the DL6000/DLM6000 is running in Interpolation or Repetitive Sampling mode, “Intp”
or “Rep” appears at the upper right of the screen.
• When the sample rate is at the maximum rate in real-time sampling mode, if you decrease the time
axis setting, the number of displayed data points (the display record length) is reduced. However, after
the display record length reaches 100 points, if you decrease the time axis setting further, the DL6000/
DLM6000 switches to Repetitive Sampling mode.
3
• When the sample rate is at its maximum rate (2.5 TS/s) in Interpolation or Repetitive Sampling mode, if
you decrease the time axis setting, the display record length is reduced.
• If the trigger mode is set to N Single and the sampling mode is set to Repetitive Sampling, the DL6000/
DLM6000 actually runs in Interpolation mode.
1
This sample rate applies to the DL6054, DL6104, DLM6054, and DLM6104. For the DL6154, the sample
rate is 5 GS/s.
2
This sample rate applies to the DL6054, DL6104, DLM6054, and DLM6104. For the DL6154, the sample
rate is 10 GS/s.
3
For the DL6054, DL6104, DLM6054, and DLM6104, the maximum sample rate is 2.5 GS/s. For the
DL6154, the maximum sample rate is 5 GS/s.
7.1 Setting Conditions for Waveform Acquisition

YOKOGAWA DL6000 Series Specifications

General

Brand	YOKOGAWA
Model	DL6000 Series
Category	Test Equipment
Language	English