Agilent Technologies Weather Radio 1680 Manuel d'utilisateur télécharger pdf (Page 41)

Chapter 3: Testing Performance

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

c If the pulse width is outside the limits, adjust the pulse generator

channel 2 width until the pulse width is within limits.

Check the setup/hold combination

The following setup/hold combinations will be tested:

Setup/Hold Combinations

1 Disable the pulse generator channel 1 COMP (with the LED off).

2 Using the Delay mode of the pulse generator channel 1, position the pulses

according to the setup time of the setup/hold combination selected,

+0.0 ps or −100 ps as measured on the oscilloscope:

a On the Oscilloscope, select [Define meas] Define ∆ Time - Stop edge:

rising, Edge number 2.

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

oscilloscope knob, position the data waveform so the falling edge is near

the center of the display.

Te s t

Combination

Setup/Hold

Times

Setup/Hold

Window

Sample Position

(in middle of Window)

1 4.50/-2.0 ns 2.5 ns -3.25 ns

2 -2.0/4.50 ns 2.5 ns +3.25 ns

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 173 174

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Agilent Technologies Weather Radio 1680 Manuel d'utilisateur Page 41