Horizontal

POSITION

HORIZONTAL MODE SEC/DIV SEC/DIV Variable X10 Magnifier DELAY TIME MULTIPLIER

Midrange NO DLY 0.05 jus CAL detent Off (knob in) 0.5 ¿us <X1

d. CHECK-Timing accuracy iswithin 3% (0.24 division) at the 10th vertical graticule line. Exclude the first 50 ns of the sweep from the measurement.

e. Repeat parts b through d for the remaining SEC/DIV switch settings and corresponding time-mark generator output (Normal) settings given in Table 4-4.

f. Pull out the X10 Magnifier knob.

Trigger

VAR HOLDOFF

MODE

SLOPE

LEVEL

SOURCE EXT COUPLING

NORM NORM

Midrange VERT MODE EXT

DC-MO

g. CHECK—Magnified timing accuracy for each SEC/ DIV switch setting and corresponding time-mark generator output (X10 Magnified) setting given in Table 4-4. At each setting combination, timing must be accurate within 5% (0.4 division) at the 10th vertical graticule line. Exclude the first 50 ns of the sweep and any portion past the 100th magnified division.

Table 4-4 Settings for Timing Accuracy Checks

SEC/DIV

Time-Mark Generator Output

Switch

Setting

Normal

X10 Magnified

0.05 ms

50 ns

10 ns

0.1 MS

0.1 ms

10 ns

0.2 ms

0.2 ms

20 ns

0.5 ms

0.5 ms

50 ns

1 ms

1 ms

0.1 ms

2 MS

2 ms

0.2 ms

5 ms

5 ms

0.5 ms

10ms

10 ms

1 ms

20 ms

20 ms

2 ms

50 ms

50 ms

5 ms

0.1 ms

0.1 ms

10 ms

0.2 ms

0.2 ms

20 ms

0.5 ms

0.5 ms

50 ms

1 ms

1 ms

0.1 ms

2 ms

2 ms

0.2 ms

5 ms

5 ms

0.5 ms

10 ms

10 ms

1 ms

20 ms

20 ms

2 ms

50 ms

50 ms

5 ms

0.1 s

0.1 s

10 ms

0.2 s

0.2 s

20 ms

0.5 s

0.5 s

50 ms

3. Check Delay Time Range a. Set:

Channel 1 AC-GND-DC GND HORIZONTALMODE INTENS

b. CHECK-Each DELAY TIME and SEC/DIV combination under "MULTIPLIER <X1" in Table 4-5 produces a nonintensified display of length shown in the "Display Length" column.

c. Rotate the MULTIPLIER control to >X20.

d. CHECK-Each DELAY TIME and SEC/DIV combination under "MULTIPLIER >X20" in Table 4-5 produces a nonintensified display of length shown in the "Display Length" column.

Table 4-5 Delay Time Range Checks

MULTIPLIER <X1

MULTIPLIER >X20

DELAY TIME Setting

SEC/DIV Setting

Display Length (Divisions)

SEC/DIV Setting

Display Length (Divisions)

0.5 ms

0.1 ms

<5

2 ms

>5

10 ms

2 ms

<5

50 ms

>4

0.2 ms

50 ms

<4

1 ms

>4

2. Check SEC/DIV Variable Range a. Set:

CH 1 VOLTS/DIV SEC/DIV SEC/DIV Variable X10 Magnifier

Fully counterclockwise Off (knob in)

b. Select 0.5-ms time markers from the time-mark generator.

c. CHECK-Time markers are 1 division or less apart.

d. Return the SEC/DIV Variable control to the CAL detent.

4. Check Delay Time Jitter a. Set:

CH 1 VOLTS/DIV 0.5 V

Channel 1 AC-GND-DC DC

SEC/DIV 50/us

DELAY TIME 10jus

MULTIPLIER <X1

b. Select 50-ßs time markers from the time-mark generator.

c. Align the 1st time marker with the 1st graticule line. Adjust the MULTIPLIER control so that the intensified sweep starts on the 5th time marker to produce a 200-fis delay.

d. Set the SEC/DIV switch to 0.05 (is and set the HORIZONTAL MODE switch to DLY'D. Adjust the MULTIPLIER control slightly to bring the leading edge of the time marker within the graticule area, if it is not already visible.

e. CHECK—Jitter on the leading edge of the time marker does not exceed 0.8 division. Disregard slow drift.

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