Agilent Technologies 54622D Especificações descarregar pdf (Página 10)

5) Leave averaging ON and set the # of Avgs to 4,096. Connect the probe tip to the Probe

Comp output. Note that the change in the display (from flat line to squarewave) is very slow

indeed. QUESTION TO PONDER: If time base is set to 200 µs/div, and there are 10

divisions on the graticule, how long does it take before 4,096 complete “sweeps” have

occurred? This is the time needed for the display, with squarewave removed, to become a

flat line, if one sweep begins right after the prior one ends. Turn averaging OFF (by

pressing the NORMAL softkey) when done with this step.

Features to Try - Using Cursors to Measure Time & Voltage:

In the “good old days”, the user of an analog ‘scope spent a lot of time measuring key

parameters of a waveform by counting divisions. The number of horizontal divisions gave

information about time (the period of a waveform, or pulse width, or time difference between two

waveforms). The number of vertical divisions told the user how big the voltage was (peak-

peak, maximum, minimum, average value, etc.).

Let’s do some measurements by manually positioning the cursors on our Probe Comp

waveform.

1) Connect Channel 1 probe to the Probe Comp output terminal, and press the Autoscale

hardkey.

2) Press the Cursors hardkey, and you will see the waveform and softkey labels as shown

below in the left picture:

3) Press the X2 softkey, and turn the Entry Knob to move the X2 cursor to the rising edge

nearest the right side of the display.

In this picture note that the (X Y) softkey

has X checked, and both the X1 and X2

cursors (dashed vertical lines) are at 0.000s

(this is the horizontal center of the display).

ow the X1 cursor is at 0.000s, the X2

cursor is at 836.0us, and ∆X = 836 – 0.00 =

836 us. Frequency = 1/∆X = 1.1962 kHz.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 30 31

Sem comentários

Agilent Technologies 54622D Especificações Página 10