Technical data

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.