Initial Control Settings

PROCEDURE STEPS

POWER

AUTO INTENSITY AUTO FOCUS

ON (button in)

As desired

Best focused display

1. Adjust Trigger Slope Balance (R482)

a. Connect the leveled sine-wave generator output via a 50-S2 cable and a 50-i2 termination to the CH 1 OR X input connector.

b. Adjust the generator output for a 50-kHz, 5-division display.

Vertical (both)

POSITION VERTICAL MODE VOLTS DIV VOLTS/DIV Variable INVERT AC-GND-DC

Midrange

CH 1

20 mV

CAL detent

Normal (button out)

c. ADJUST—Slope Bal (R482) for a positive vertical shift of 0.15 division at the sweep start when changing the TRIGGER SLOPE switch fromto J.

2. Check/Adjust Auto Trigger Centering (R511 and R512) and TRIG'D LED Operation a. Set:

Horizontal

POSITION

HORIZONTALMODE SEC/DIV SEC/DIV Variable X10 Magnifier

Midrange NO DLY 20 ¡is

CAL detent Off (knob in)

TRIGGER LEVEL TRIGGER SLOPE

Fully clockwise

b. Adjust the generator output for a 1-division display.

c. ADJUST—(+) Auto (R511) so that the display just triggers on the positive peak of the signal.

Trigger

VAR HOLDOFF

A TRIGGER MODE

SLOPE

LEVEL

SOURCE EXT COUPLING

NORM

AUTO

Midrange VERT MODE INT DC

TRIGGER LEVEL TRIGGER SLOPE

Fully counterclockwise

"V

e. ADJUST-(-) Auto (R512) so that the display just triggers on the negative peak of the signal.

f. Set TRIGGER MODE to NORM.

g. CHECK—TRIG'D LED is illuminated when a stable display is present and is off when the display is not triggered.

j. Move the generator output from the CH 2 OR V input connector to the CH 1 OR X input connector. Set VERTICAL MODE to CH 1.

k. Repeat part d.

I. Disconnect the test setup.

3. Check Internal Triggering a. Set the CH 1 VOLTS/DIV switch to 2 mV.

b. Set the generator output to produce a 4-division, 2-MHz display.

c. Set the CH 1 VOLTS/DIV switch to 20 mV.

d. CHECK-Stable display can be obtained by adjusting the TRIGGER LEVEL control for each switch combination given in Table 5-9.

Table 5-9

Switch Combinations for Triggering Checks

Table 5-9

Switch Combinations for Triggering Checks

TRIGGER MODE

TRIGGER SLOPE

NORM

S

NORM

"V

AUTO

AUTO

J

e. Move the generator output from the CH 1 OR X input connector to the CH 2 OR Y input connector. Set VERTICAL MODE to CH 2.

f. Repeat part d.

g. Set the SEC/DIV switch to 0.05 jus.

h. Set the generator to produce a 1.5-division, 60-MHz display.

i. Repeat part d.

4. Check External Triggering a. Set:

VOLTS/DIV (both) 10 mV

SEC/DIV 20 mS

VERTICAL MODE CH 1

b. Connect the test setup as shown in Figure 4-1.

c. Set the leveled sine-wave generator to produce a 5-division, 50-kHz display.

SEC/DIV 0.2 mS

SOURCE EXT

VERTICAL MODE CH 2

e. Move the signal from the CH 1 OR X input connector to the EXT INPUT connector.

f. Set the generator to 2 MHz.

g. CHECK-Stable display can be obtained by adjusting the TRIGGER LEVEL control for each switch combination given in Table 5-9.

h. Remove the 10X attenuator from the test setup and set the EXT COUPLING switch to DC+10.

i. Repeat part g.

VOLTS/DIV (both) 50 mV

VERTICAL MODE CH 1

SEC/DIV 20 mS

SOURCE INT

k. Reconnect the test setup as shown in Figure 4-1.

I. Set the leveled sine-wave generator to produce a 5-division, 50-kHz display.

VERTICAL MODE CH 2

SEC/DIV 0.05 fis

X10 Magnifier On (knob out)

SOURCE EXT

n. Repeat part e.

o. Set the generator to 60 MHz.

p. Repeat parts g and h.

q. Repeat part g.

r. Disconnect the test setup.

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