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waveform to the VIDEO TRIGGER and CRT Y-Axis Deflection circuits, allowing several
of the fast sweep times (10 psec to 200 psec) to be checked. Key in INSTR PRESET or
FREQUENCY SPAN
TRIGGER LEVEL control to display a two-cycle waveform; then, increase the (-TIME)
setting to check sweep times up to 200 psec.
As an alternative, a function generator can be set for a 0.0 to 1.0 V dc, 100 Hz square wave
output, and then connected to A3A2Jl to check all the fast sweep times (1 psec to 10 msec).
Key in INSTR PRESET or
TRIGGER and adjust the TRIGGER LEVEL control to display a two-cycle square wave
similar to the waveform of Figure 3. Then, decrease the [SWEEP) setting and increase the
function generator frequency setting in steps as listed in Table 1, checking that a two-cycle
waveform is displayed for each step.
0 Hz, (-TIME) 10 psec, @iZ5) TRIGGER and adjust the
)
FREQUENCY SPAN
Table 1. Fast Sweep Time Check
Sweep Time
10 msec
5 msec
2 msec
1 msec
500 psec
200 psec
100 psec
50 psec
20 psec
10 psec
5 psec
2 psec
1 psec
0 Hz, (-TIME) 20 msec, @ii%Z)
)
Frequency
200 Hz
400 Hz
1 kHz
2 kHz
4 kHz
10 kHz
20 kHz
40 kHz
100 kHz
200 kHz
400 kHz
1 MHz
2 MHz
9
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