Thermo Scientific APEX 100 User Manual page 191

Here are a few tips on using the scope-configuration functions.
• If you cannot see a signal trace on the oscilloscope screen, go to the amplitude
menu (on page 1 of the scope-configuration menu) and enter a higher or lower
value to bring the signal within range.
• If the signal trace is either very compressed or very spread out along the
horizontal (time) axis, go to the time-base menu (on page 1 of the scope-
configuration menu) and enter a higher or lower value to get the signal "spread"
you want.
• If you cannot get the Channel 1 and Channel 2 signals to display together along
the oscilloscope screen's horizontal center-line, go to the offset function (on
page 1 of the scope-configuration menu) and enter a higher or lower value to
display the signals to your satisfaction.
Using the Oscilloscope's Trigger Functions
There are three settings for the oscilloscope's trigger function, as follows. (These
functions are accessed from the lower-right corner of the start-up oscilloscope screen.)
• No Trigger
This function is abbreviated in the start-up oscilloscope screen as "TRIG: FREE"
and tells the oscilloscope to continuously process signal at the rate specified in
the time-base menu. Thus, when using this function, the screen scrolls
continuously.
• Wait-for-Detection Trigger
This function is abbreviated in the start-up oscilloscope screen as "TRIG: WAIT
DETECTION" and tells the oscilloscope to wait until a signal is detected, and then
display it at the rate specified in the time-base menu. Thus, when using this
function, the screen scrolls continuously.
• Hold-After-Detection Trigger
This function is abbreviated in the start-up oscilloscope screen as "TRIG: HOLD
DETECTION" and tells the oscilloscope to wait until a signal is detected, and then
freeze the display, so the signal does not scroll off the screen. Thus, when using
this function, the screen is static, making captured signals easy to see and study.
Thermo Scientific APEX User's Guide Page 191