o. Disconnect the test setup.
n. Repeat parts d through k to check the B TRIGGER
POSITION function.
m. Press A/B TRIG to select the B Trigger System and
set the HORIZONTAL mode to B. Use the TRIGGER
LEVEL control to trigger the display as required.
I. Set the TRIGGER POSITION menu to 7/8 and verify
that the Trigger Point Indicator is positioned on a time
marker approximately 2.5 divisions to the right of the
center graticule line.
k. Set the TRIGGER POSITION menu to 3/4 and verify
that the Trigger Point Indicator moves to a time marker
that is approximately at center screen.
j.
Use the HORIZONTAL POSITION control to position
the time marker with superimposed Trigger Point Indicator
to the extreme left graticule line.
i. Set the TRIGGER POSITION menu to 1/2 and verify
that the Trigger Point Indicator moves to a time marker
that is approximately at center screen.
h. Use the HORIZONTAL POSITION control to posi-
tion the time marker with superimposed Trigger Point Indi-
cator to the extreme left graticule line.
g. Set the TRIGGER POSITION menu to 1/4 and verify
that the Trigger Point Indicator moves to a time marker
that is approximately at center screen.
f. VERIFY-That the Trigger Point Indicator (a "T"
symbol on screen) is positioned on a time marker approxi-
mately 2.5 divisions to the right of the extreme left grati-
cule line.
e. Select TRIG POSITION and set 1/8 on.
d. Position the start of the display to the extreme left
graticule line.
c. Set the generator marker period to 1 ms.
4-22
b. Connect the MARKER output of the Time Mark
Generator to the CH 1 input through a 50 Q cable.
1 VCH 1 VOLTS/DIVSet:
Off
Select VERTICAL MODE
Set: CH 2
7. Verify A and B Trigger Position Function.
a. Recall the Initial Front Panel Setting by performing
the following sequence: Select SAVE/RECALL SETUP,
press the menu button labeled RECALL (menu will
change), and then press the menu button labeled 1. Make
the following changes to the front panel setup:
d. Disconnect the test setup.
The Trigger Point Indicator, a small
"T"
riding on the
displayed waveform, indicates the point the instru-
ment is triggered on for the displayed waveform.
NOTE
c. Using the TRIGGER LEVEL control, VERIFY that
the display can be triggered on the positive-going slope of
the ac waveform for the + (plus) selection of the SLOPE
button and on the negative-going slope for the - (minus)
selection of the SLOPE button.
b. Connect a 10X probe to the CH 1 input connector
and connect the probe tip to an ac (line) source.
~
DO NOT connect the probe ground lead to the ac
(line)power source when performing this step.
On
Select TRIGGER SOURCE
Set: LINE
5V
5
ms
Set: CH
1
VOLTS/DIV
A SEC/DIV
OFF
Select CH
1
COUPLING/INVERT
Set: 50 Q ON:OFF
Off
Select VERTICAL MODE
Set: CH
2
change), and then press the menu button labeled 1. Make
the following changes to the front panel setup:
Performance Check and Functional Verification Procedure
2430 Service
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