Agilent Technologies InfiniiVision 3000 X- Series Advanced Training Manual page 26

2
Oscilloscope Familiarization Labs
26
27
28
The frequencies at the X1 and X2 cursor locations are displayed near the
bottom of the scope's display.
Let's now verify the fundamental frequency of this signal using the scope's
"counter" measurement.
29
30
31
The "counter" measurement measures the average frequency over a fixed
gate time to provide a very high resolution (5 digits) measure of frequency,
similar to a standalone counter. But the measurement requires that the
input signal be repetitive.
The "frequency" measurement measures the period of just one cycle of the
signal, and then computes the frequency by taking the reciprocal.
26
After the Cursors menu closes, turn the Entry knob until the X1 cursor
is on top of the highest frequency peak (near the left side of the
display).
Push the Cursors knob again and select the X2 cursor.
After the Cursors menu closes, turn the Entry knob until the X2 cursor
is on top of the 2nd highest frequency peak.
Press the [Meas] front panel key.
Press the Type softkey; then turn the Entry knob until the arrow points
to Counter.
Now either push the Entry knob to select this measurement, or press
the Add Measurement softkey.
3000 X-Series Oscilloscopes Advanced Training Guide