LeCroy DDA-3000A, Operator'S Manual

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WM-OM-E Rev I
except a combination of channels 1 and 2, or channels 3 and 4, which yield 10 GS/s. The basic rule
is to choose either channel 1 or 2 for your first input, and either channel 3 or 4 for the second input.
Refer to Acquisition Modes in the specifications for maximum sample rates.
To Combine Channels
1. In the menu bar, touch Timebase ; the "Horizontal" setup dialog opens.
2. Under Active Channels , touch 4 , 2 or Auto . The maximum sample rate is shown
alongside each button.
SDA 11000 DBI Controls
The SDA 11000 scope’s 11 GHz bandwidth and 40 GS/s sampling rate are achieved by an
innovative LeCroy technology called Digital Bandwidth Interleaving (DBI). This technology allows
resources to be borrowed from unused channels to multiply not only sample rate but also
bandwidth.
When 11 GHz is selected, the active channels are either C2 or C3
or both, providing 40 GS/s sampling on each channel. For 6 GHz
bandwidth, all four channels can be used, providing 20 GS/s
sampling on each channel. Channels can be set to allow 11 GHz
and 6 GHz bandwidths at the same time, as shown at left.
Bandwidth
Number of
Channels
Sample Rate
11 GHz 2 40 GHz
6 GHz 4 20 GHz
SMART Memory
Note: When the SDA 11000 is in 11 GHz mode, only Fixed Sample Rate sampling is available.
LeCroy's SMART Memory feature ensures the highest time resolution for the time window
displayed, without aliasing. SMART Memory provides these advantages:
•
Acquisition memory is automatically allocated as needed.
•
Memory size optimization: Set Maximum Memory optimizes memory to obtain highest
sampling rate, reducing the risk of aliasing. You can set a maximum memory up to 48
Mpts.
•
Fixed Sample Rate allows setting of a specific sample rate, with the scope calculating
the amount of memory needed for a timebase setting.
•
The entire acquisition is displayed on the screen.
•
High-speed compaction shows all significant features of your waveform.
You can set a maximum memory up to 48 Mpts.