w. Disconnect the test setup.
v. CHECK-That the positive-going edge of the
second negative pulse is located between the two cursors.
u. Adjust the generator to reduce the PERIOD of the
waveform. Reduce the period until the display is stably
triggered, but any further decrease in period causes an
unstable display.
t.
Select CH 1 COUPLING/INVERT and set INVERT
ON:OFF to ON. Switch TRIGGER SLOPE to + (plus).
s. Adjust the generator to return the waveform
PERIOD to 7 1/2 divlslons.
r. CHECK-That the negative-going edge of the
second negative pulse is located between the two cursors.
q. Adjust the generator to reduce the PERIOD of the
waveform. Reduce the period until the display is stably
triggered, but any further decrease in period causes an
unstable display.
p. Set the CH 1 VOLTS/DIV control to 200 mV.
o. Press CURSOR SELECT and use the
CURSOR/DELAY control to adjust the right-most cursor
for a readout value of 13.000 II-S.
n. Return the A SEC/DIV control to 211-s.Press CUR-
SOR SELECT and use the CURSOR/DELAY control to
realign the left-most cursor to the falling edge of the pulse.
m. Select SET TV and set TV LINE on.
I.
Select TRIGGER CPLG and set TV on.
k. Adjust the generator PULSE DURATION until the
negative-going portion of the square wave is aligned to the
two cursors (i.e., is equal to 2.000 II-s).
j. Press CURSOR SELECT to select the right-most
cursor and adjust it for a readout of 2.000 II-S.
4-34
i. Use the CURSOR/DELAY control to align the left-
most cursor to the falling edge of the negative-going pulse
(aligned to the graticule line in part d).
h. Select CURSOR FUNCTION and set TIME on.
g. Switch the A SEC/DIV control to 500 ns.
f. Adjust the generator PULSE DURATION control until
the negative-going portion of the square wave is approxi-
mately 1 horizontal division in duration.
e. Adjust the generator PERIOD control for a 7.5 divi-
sion (approximately 15 II-s)period for the displayed square
wave.
d. Use the HORIZONTAL POSITION control to posi-
tion the Trigger Point Indicator (small "T" riding on the
waveform) to the vertical graticule line 4 divisions left of
graticule center.
c. Set the amplitude for a 3 division pulse, stepping
negative from ground.
b. Connect the square-wave output of a Pulse Genera-
tor to the CH 1 input connector via a 50 11cable and a
50 11termination.
Select CH 1 COUPLING/INVERT
Set: 50 11ON:OFF OFF
On
Select BANDWIDTH
Set: 20 MHz
50 mV
211-s
- (Minus)
Set: CH
1
VOLTS/DIV
A SEC/DIV
TRIGGER SLOPE
Off
Select VERTICAL MODE
Set: CH 2
11. Check Sync Separation (± SLOPE)
(TV Option 05 only).
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:
Performance Check and Functional Verification Procedure
2430 Service
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