BRIEF CHECKING PROCEDURE
3 - 9
-
Press the left of the DELAYED TIMEBASE TIME/DIV keys and verify that the
number of the displayed signal periods increases. The lowest TIME/DIV range
is 100
µ
s/division.
-
Press the right of the DELAYED TIME BASE TIME/DIV keys and verify that
the number of displayed periods increases. Proceed until the time scale of
50
.
0
µ
s/division is reached.
-
Select ’trig’d’ from the DELAYED TIME BASE menu.
-
Press the front panel key TRIG1 if the DELAYED TIMEBASE is not triggered
on CH1. This is indicated in the lower right corner of the display.
-
Use the
∆
control to adjust the trigger level of DELAYED TIMEBASE for
-
a triggered display (signal on DEL’D TB time scale visible).
MAIN TB trigger slope and time coeficients in digital mode:
-
Press the ANALOG key (’DIGITAL MODE’ is displayed briefly). The
oscilloscope is now in digital mode.
-
Press the AUTOSET key.
-
Adjust the AMPL keys to an input sensitivity of 100 mV/division.
-
Adjust the MAIN TB TIME/DIV keys to 100
µ
s/DIV.
-
Press the TRIG1 key and verify that the displayed square wave starts with a
negative going signal.
-
Press the TRIG1 key and triggering on the positive slope is obtained again.
-
Press the left side of the MAIN TB TIME/DIV keys and verify that the number
of signal periods increases.
-
Select 500
µ
s/division and verify that one signal period is displayed per
division.
-
Press the right side of the MAIN TB TIME/DIV keys and verify that the number
of signal periods decreases.
-
Use the MAIN TB TIME/DIV to select 20.0
µ
s/division.
ST6655
CH1 0.2V
MTB ...
DTB ...
400
µ
s
DELAY TB DISPLAY
MAIN TB DISPLAY
POS
TRACK
Figure 3.9