Agilent Technologies 4000 X Instrukcja Obsługi Pobierz pdf (Strona 31)

Oscilloscope Familiarization Labs 2

4000 X-Series Oscilloscopes Advanced Training Guide 31

Lab #5: Using Segmented Memory Acquisition Mode

All oscilloscopes have a limited amount of acquisition memory. The

amount of acquisition memory that your scope has will determine the

length of time it can capture while still using a fast sampling rate. You can

always capture a long time span by simply setting the timebase to a long

time/div setting. But the scope may automatically reduce its sample rate in

order to capture the long time- span which will reduce acquired waveform

detail and measurement resolution. Using this scope’s Segmented Memory

acquisition mode is another solution to optimize memory depth and

sample rate; especially when attempting to capture multiple low duty cycle

type signals. Agilent 4000 X-Series Oscilloscopes come with segmented

memory as a standard option. Let’s now attempt to capture and display a

simulated low duty cycle radar burst.

1 Connect the channel-1 probe to the Demo 1 terminal and ground.

2 Press [Default Setup] on the scope’s front panel.

3 Press [Help]; then press the Training Signals softkey.

4 Select the RF Burst signal.

5 Set channel- 1’s V/div setting to 500.0 mV/div.

6 Set the scope’s timebase to 200.00 ns/div.

7 Set the scope’s trigger level to approximately +900 mV (~2.0 divisions

above center- screen).

8 Press the [Intensity] button (under the Entry knob); then set the

waveform trace intensity to 100% using the Entry knob.

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Agilent Technologies 4000 X Instrukcja Obsługi Strona 31