Agilent Technologies Weather Radio 1680 Bedienungsanleitung PDF herunterladen (Seite 40)

Chapter 3: Testing Performance

To test the single-clock, single-edge, state acquisition

Verify the test signal

1 Check the clock period. Using the oscilloscope, verify that the master-to-

master clock time is 5.000 ns, +0 ps or −100 ps:

a In the oscilloscope Timebase menu, select Scale: 1.000 ns/div.

b In the oscilloscope Timebase menu, select Position. Using the

oscilloscope knob, position the clock waveform so that a rising edge

appears at the left of the display.

c On the oscilloscope, select [Shift] Period: channel 2, then select [Enter]

to display the clock period (Period(2)). If the period is not less than

5.000 ns, go to step d. If the period is less than 5.000 ns, go to step 2.

d In the oscilloscope Timebase menu, increase Position 5.000 ns. If the

period is not less than 5.000 ns, decrease the pulse generator Period in

until one of the two periods measured is less than 5.000 ns.

2 Check the data pulse width. Using the oscilloscope, verify that the data

pulse width is 2.500 ns, +0 ps or −100 ps.

a In the oscilloscope Timebase menu, select Position. Using the

oscilloscope knob, position the data waveform so that the waveform is

centered on the screen.

b On the oscilloscope, select [Shift] + width: channel 1, then select

[Enter] to display the data signal pulse width (+ width(1)).

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Agilent Technologies Weather Radio 1680 Bedienungsanleitung Seite 40