5-1
IM 701510-01E
Setting the V
ertical and Horizontal
Axes
5
5.1
Turning Display of Input Signal Waveforms ON/
OFF
1.
The waveform will appear on the display after you have pressed the
CH key
. The indicator above the
CH key
will light up.
2.
If you want to display all waveforms, press all the
CH keys
, and
verify that all the indicators light up.
3.
In order to turn the display of a waveform off, press the corresponding
CH key
once more.
Explanation
Maximum display record length and limits on waveform acquisition (when 1
MW for 1520L or 2 MW for DL1540L is selected)
The channels which acquire/display the waveform are limited to channel 1 on DL1520L and
channel 1 and 2 on DL1540L. Channel 2 on DL1520L and channel 3 and 4 on DL1540L do
not acquire/display the waveform.
When the time axis setting is set to 50 ns to 5 ns range; when the trigger mode is not single
mode; or when one of the two, channel 2 or trace math in the case of DL1520L and one of
the two, channel 3 or 4 in the case of DL1540L is ON, maximum display record length of 1
MW for DL1520L and 2 MW for DL1540L can not be selected.
For information about selection of maximum displayable record length, refer to Section 7.1
(page 7-1).
CH key operation during waveform math
The math waveform will be displayed at trace 3 (for DL1540/DL1540L, location where the
input signal of channel 3 is usually displayed). For DL1540/DL1540L, even if you press the
CH3 key, and the indicator is lit, the math waveform will be displayed. For DL1520/
DL1520L, the math waveform will be displayed at trace MATH.
The math waveform consists of data of channel 1 and channel 2. Even when you turn off the
display of channel 1 or 2, the math waveform will remain.
For DL1540/DL1540L, to display the input signal waveform of channel 3, you have to turn
OFF waveform math. Refer to page 8-16.
CH key operation during display of a recalled waveform
When you recall waveform data from the internal memory, that waveform will appear on the
screen.
To turn the display of the recalled waveform off, press the CH key corresponding to the
number of the recalled waveform (displayed as “MEM”), and select OFF at the appeared
menu. Refer to page 11-2, step 13 and 14.
CH key operation during display of a loaded waveform
When you load P-P waveform data or acquisition waveform data from a floppy disk, that
waveform will appear on the screen.
To turn the display of the P-P waveform off, press the CH key corresponding to the number
of the P-P waveform (displayed as “MEM”), and select OFF at the appeared menu. Refer to
page 12-5, step 19 and 20.
To turn the display of the acquisition waveform off, press the CH key corresponding to the
number of the acquisition waveform.
CH key operation during display of a GO/NO-GO zone waveform
Pressing a CH key turns display of both the corresponding input signal waveform and the
zone waveform ON/OFF.
Note
• If the START/STOP key is pressed to start acquisition while loaded waveforms are displayed, the
displayed waveforms will be cleared from the screen. It is possible to retain a desired waveform on
screen by stopping acquisition of the corresponding channel. For a description of this operation, refer
to page 12-6.
• For DL1520L/DL1540L, if you have saved ACQ data to multiple floppy disks, you can opt to load all
of this data or only part of it (for example, data from one disk only). If you do a partial load, the
waveform display will not appear over the entire time axis, but only over a portion of it. Refer to the
procedures for saving and loading of ACQ waveform data, beginning on page 12-5.
• Pressing the SNAP SHOT key also keeps the waveform on the screen. To clear the snapshot waveform,
press the CLEAR TRACE key.
• In the following cases erroneous waveforms might appear on channel 3 or 4 (channel 2 for DL1520).
Acquiring the waveform once again will result in a correct display.
• For DL1540, when the record length is 120KW, the trigger mode is SGL (L) and waveform
acquisitioning has ended and you turn CH3 or CH4 ON, while they had been OFF until then.
• After acquiring waveforms at 200 MS/s and you stop acquisition, and then you switch CH3 or CH4
(CH2 for DL1520/DL1520L) ON.
Keys and Procedure
CH key
