Keysight 1000B Series, User Manual

Page: 40 / 148

40 Keysight 1000B Series Oscilloscopes User’s Guide
2
Displaying Data
When the time/div is set to 50 ms/div or slower, the oscilloscope enters Slow
Scan mode (see “Slow Scan Mode” below).
When the horizontal scale is set to 20 ns or faster, the oscilloscope uses
sine(x)/x interpolation to expand the horizontal time base.
• Push the horizontal scale knob to toggle between the zoomed time base and
the normal time base display (see “To display the zoomed time base” on
page 41).
The time/div setting is displayed in the status bar at the top left of the screen.
Because all channels are displayed in the same time base (except in the Alternate
trigger mode), the oscilloscope displays one time/div setting for all channels.
Slow Scan Mode
When the horizontal scale is set to 50 ms/div or slower, the oscilloscope enters
Slow Scan mode.
In the Slow Scan mode, peak detect acquisition is used so that no data is missed
(even the though the Acquire menu may show a different acquisition mode
setting). The oscilloscope acquires sufficient data for the pre-trigger part of the
display, then waits for the trigger. When the trigger occurs, the oscilloscope
continues to capture data for the post-trigger part of the display.
When using the Slow Scan mode to view low frequency signals, the channel
coupling should be set to “DC”.
The Slow Scan mode lets you see dynamic changes (like the adjustment of a
potentiometer) on low frequency waveforms. For example, Slow Scan mode is
often used in applications like transducer monitoring and power supply testing.
To adjust the horizontal position
• Turn the horizontal position knob to change the position of the trigger point
relative to the center of the screen.
The position knob adjusts the horizontal position of all channels, math
functions, and reference waveforms.
• Push the horizontal position knob to “zero” the trigger point (in other words,
move it to the center of the screen).