PERFORMANCE TEST
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4.3.43
Auto range functions
The AUTO RANGE function of the vertical channels automatically selects the
input sensitivity. The result is that the input signal is displayed with 2 to 6.4
divisions amplitude.
The AUTO RANGE function of the main time base (MAIN TB) adjusts the time
base automatically so that approximately 2 to 6 waveform periods are displayed.
Test equipment:
Fluke 5500A mode: wavegen, wave sine (Alternative: function generator,
PM 5136)
Settings/procedure:
1
-
Apply a 50kHz sine-wave signal of 2 V(pp) to CH1.
2
-
Press the AUTOSET key.
3
-
Adjust the generator output voltage to maximum (20 ... 30 V
approximately). The signal amplitude now exceeds the 8 div screen
height.
4
-
Press the ANALOG key (’DIGITAL MODE’ is displayed briefly) to switch
the digital mode to on.
5
-
Press the CH1 AUTO RANGE key. Check that the vertical amplitude is
automatically adjusted to between 2 and 6.4 divisions.
6
-
Vary the generator output voltage from maximum to 100 mV.
Requirements:
-
Check that the signal amplitude stays between 2 and 6.4 divisions.
-
Repeat this procedure for the other vertical channels that have an AUTO
RANGE key.