Tektronix 1780-R

Connectors, Controls, Indicators

1780R-Series Operator’s Manual 2–13

and continuously increase the magnification factor. Magnifica-

tion factors are shown in Table 2–2.

Table 2–2: Waveform Magnification

> tton

Magni ication

msec/Div

tton

Setting

Magni

ication

Factor 1 Line 2 Line 3 Line

Off X1 5.0 ms 10.0 ms 15.0 ms

One Push X5 1.0 ms 2.0 ms 3.0 ms

Two Pushes X10 0.50 ms 1.0 ms 1.50 ms

Three Pushes X20 0.25 ms 0.50 ms 0.75 ms

Four Pushes X25 0.20 ms 0.40 ms 0.60 ms

Five Pushes X50 0.10 ms0. 20 ms 0.30 ms

Six Pushes X100 0.05 ms 0.10 ms 0.15 ms

30. OFF <. Push and release to decrease magnification (up to six

steps). Turns off the magnifier when pushed enough times, or

when held.

31. VAR / SLOW (Switch). This switch toggles between Variable

Sweep, Slow Sweep, and Off (calibrated sweep).

32. SWEEP RATE (Control). Use the knob to control the sweep rate

when VAR is selected, and sweep duration when SLOW is

selected. VAR and SLOW control settings are saved and

reinstated each time the mode is entered. To return to calibrated

sweep, push the VAR/SLOW button until the red LEDs are off.

Gain

33. VAR / X5 (Switch). This switch controls the waveform monitor

vertical gain. Push and release to toggle through variable gain,

X5 gain, and off. The waveform knob controls the amount of

variable gain when VAR is selected. Push and hold to enable both

X5 and Variable Gain.