Table 5. Sweep Timing

TB-9-6625-149-50 Oscilloscope Tektronix Type 541A (AN/USM-164) and Current Probe Amplifier Tektronix Types 131-1 Through-4 With Current Probe Manual
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TB 9-6625-149-50

Table 5. Sweep Timing - Continued

Time-mark

Test instrument

generator

Markers

TIME/CM

setting.

Per/cm.

switch setting

5 MILLISEC

5 mS

10 MILLISEC

10 mS

20 MILLISEC

10 mS

50 MILLISEC

50 mS

.1 SEC

.1 S

.2 SEC

.1 S

.5 SEC

.5 S

1 SEC

2 SEC

5 SEC

1Adjust

C375 (fig. 2) and C348 (fig. 1). (R)

2Adjust

C160 A (fig. 1). (R)

3Adjust C160C (fig 1). (R)

4Adjust C160E (fig 1). (R)

(4) Position TI controls as listed in (a) through (c) below:

(a) TIME/CM switch to .1 SEC.

(b) HORIZONTAL DISPLAY switch to 5X MAG.

(5) Connect TRIGGER OUTPUT of time-mark generator to TI TRIGGER

INPUT, using cable (B4 or B5) and if necessary, adapter (B2).

(6) Set time-mark generator to 20 nS output.

(7) Position second cycle behind second vertical graticule line with HORIZONTAL

POSITION control. If ninth cycle is not between 7.6 and 8.4 centimeters from second

cycle, perform b(2) below.

(8) Position 13th cycle from end of trace behind second vertical graticule line with

HORIZONTAL POSITION control. If fourth cycle from end of trace is not between 7.6 and

8.4 centimeters from 13th cycle, perform b(3) below.

b. Adjustments

(1) Adjust the respective adjustments listed in table 5 footnotes.

(2) Adjust C364 (fig. 2) for 1 cycle/cm over middle 8 centimeter. (R)

(3) Adjust C384 (fig. 2) for 1 cycle/cm over middle 8 centimeter. (R)

17. External Dc Balance

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