Agilent Technologies 54657A Betriebsanweisung PDF herunterladen (Seite 43)

Press the Set 100% softkey to set the t1 marker to 0° and the t2 marker

to 360°. All readings (except second ∆t display in seconds) are now

relative to the established t1/t2 marker positions.

•

t1 reads the phase the t1 marker has moved from established 0° position.

Negative readings indicate marker has moved away from the t2 marker.

•

t2 reads the phase the t2 marker has moved from established 360°

position. Negative readings indicate marker has moved through the

established t1 marker position.

•

∆t in degrees reads the phase difference between the t1 and t2 marker

repetitive to the established positions. Negative readings indicate markers

have crossed.

•

∆t in seconds reads the time difference between the t1 and t2 marker

positions. Negative readings indicate markers have crossed.

Additional FFT Function Keys

When the FFT function is selected (refer to Math Functions), two additional keys

are available as follows:

Find Peaks Pressing this key sets Vmarker1 and the start marker (f1) on the FFT

trace peak with the highest amplitude and sets Vmarker2 and the stop marker

(f2) on the peak with the next highest amplitude. Marker values in dBV or

frequency (dependent on the active cursor)are automatically displayed at the

bottom of the oscilloscope screen. The difference in dBV (∆V) or frequency ( ∆f)

between the two peaks is also displayed.

Move f1 To Center Pressing this key changes the center graticule (or center

frequency) to the current f1 marker frequency. If f1 cannot be found, a message

is displayed on the screen.

Operating the Measurement/Storage Module

To make additional cursor measurements

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Agilent Technologies 54657A Betriebsanweisung Seite 43