YOKOGAWA DLM4038, Руководство по началу работы

Страница: 84 / 109

6-9
IM DLM4038-03EN
Specifications
1
2
3
4
5
6
App
Index
6.5 Features
Vertical and Horizontal Control
Item Specifications
Channel on/off CH1 to CH8 and LOGIC can be turned on and off separately.
Either CH8 or LOGIC (L) can be turned on at any given time.
When interleave mode is on, all even-numbered channels, including LOGIC (L), are automatically
are turned off.
Logic signal bus display The bits of the LOGIC(L) port can be assigned to Bus, and the bits of the LOGIC(A|B) ports can
be assigned to Bus2 or Bus3. The assigned bits can be shown on a bus display. The bus display
shows the logic signal in accordance with the specified format (Format) and bit order (Bit Order).
Logic signal state display Displays logic signals that have been sampled on the edges of a clock signal. Even when the input
signal changes, a state is retained until the clock source edge changes.
For the LOGIC(L) port, you can select the clock source from CH5 to CH7 or from L0 to L7. For the
LOGIC(A|B) ports, you can select from A0 to A7 and B0 to B7.
Vertical position Turning the vertical position knob moves the vertical position of a waveform in the range of ±4 div.
Analog waveforms (analog signal waveforms):
A waveform can be moved in the range of ±4 div from the center of the waveform display frame.
CH1 to CH8 are moved separately.
Logic waveforms (logic signal waveforms):
The center of logic waveforms can be moved in the range of ±4 div from the center of the
waveform display frame.
Press the vertical position knob to reset the position to its default value (0 div).
Vertical scale The vertical SCALE knob can be used to set the voltage per grid division (V/div) or the current per
grid division (A/div).
Press the SCALE knob to switch between a mode in which you can set values in 1-2-5 steps or a
mode in which you can set values in detail (FINE).
For the selectable range when using 1-2-5 steps, see “Analog Signal Input” in Section 6.1, “Signal
Input Section.”
FINE vertical sensitivity is achieved through digital zooming.
If you change the scale while the DLM4000 is stopped, you can vertically expand or reduce
waveforms.
Logic waveforms can be expanded to three different display-size levels.
Input filtering Bandwidth limit can be specified for CH1 to CH8 separately.
For the available filter types, see “Bandwidth limit” in section 5.1, “Signal Input Section.”
Offset cancelling Can be set to on or off for CH1 through CH8
OFF: Does not apply the specified offset to the result of cursor measurements, computations, and
automated measurement of waveform parameters.
ON: Applies the specified offset to the result of cursor measurements, computations, and automated
measurement of waveform parameters.
Inverted display Waveforms can be inverted around the vertical position for CH1 to CH8 separately.
Configuration and measurement are executed on the waveforms before the inversion.
Linear scaling Scaling coefficient, offset value, and unit can be specified for CH1 to CH8 separately.
Logic signal 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 time offset (skew) between CH1 to CH8 and logic signals can be adjusted.
CH1 to CH8 can be adjusted separately. Logic waveforms can be adjusted at the port (pod (8-bit))
level. Adjustment at the bit level is not possible. Trigger deskewing is also not possible.
The adjustable range is ±100 ns in 0.01 ns steps.
Horizontal position You can set the waveform’s horizontal display position by using the horizontal position knob to set
the trigger position or 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 “Selectable
trigger delay range” in section 6.2, “Triggering Section.”
Delay cancelling You can select whether 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).
* The LOGIC(A|B) ports are available on models with the /L16 option.