100 and 50 MHz, Programmable-Voltage
Digital Waveform Generator/Analyzers
NI 655x
• 100 MHz maximum clock rate
Operating Systems
• Windows 2000/NT/XP
• LabVIEW Real-Time
• -2.0 to 5.5 V programmable voltage
levels in 10 mV steps
• 20 channels with per-channel, per-cycle
bidirectional control
• 1, 8, or 64 Mb/channel onboard memory
• Real-time hardware comparison of
acquired data
Recommended Software
• LabVIEW
• LabWindows/CVI
• SignalExpress
• Complex triggering and pattern
sequencing
• Interactive waveform and script
editor software
• Synchronization and Memory Core
(SMC) for tight synchronization with
other SMC-based devices
Driver and Editing Software
(included)
• NI-HSDIO driver
• Script Editor
• Digital Waveform Editor
(included with 8 and
64 Mb/channel models)
Calibration
• NIST traceable
• 2-year external calibration cycle
Maximum Clock
Rate (MHz)
Memory
(Mb/channel) (Linking/Looping)
Scripting
Programmable Per-Cycle
Hardware
Comparison
Product Platform
Channels
Voltage Levels
Data Delay
Tristate
NI 6552
NI 6551
PCI, PXI
PCI, PXI
20
20
100
50
Programmable, 10 mV steps
Programmable, 10 mV steps
1, 8, or 64
1, 8, or 64
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Table 1. NI 655x Selection Guide
Overview
Design High-Performance Tests
For building high-performance stimulus-response systems, the NI 655x
The National Instruments 6552 and
6551 are 100 and 50 MHz digital
waveform generator/analyzers,
respectively, for characterizing,
validating, and testing digital
Applications
Semiconductor
devices include:
• A sophisticated timing engine to adjust for the timing parameters
of the device under test
Mixed-signal design validation and test
Interfacing to digital electronics
Aerospace/Defense
Subsystem emulation
• Programmable voltage levels for testing multiple devices or
characterizing a single device under changing conditions
• Per-cycle tristate for bidirectional communication
• A versatile memory architecture for maximum flexibility of waveform
and scripting memory
Bit error rate tester (BERT)
electronics. These modules feature
20 channels with per-channel,
Communications
Multimedia chipset emulation
per-cycle direction control and deep
onboard memory with triggering and
pattern sequencing. You can program
the voltage levels on NI 655x devices
Consumer Electronics
CMOS and CCD imaging sensors
Digital display tests
The hardware architecture is designed to preserve high signal quality,
and an eye diagram of the PXI-6552 generation is shown in Figure 1.
You can use the internal clock or an external clock, such as from the
NI PXI-5404, through the front panel. You can also shift the data
generated, data acquired, and exported sample clock relative to the
onboard clock for clock frequencies above 25 MHz, which is critical to
adjust for propagation delays and setup-and-hold times in the device
under test.
with 10 mV resolution. You can use them with the NI Digital Waveform
Editor, an interactive software tool for creating, editing, and importing
digital waveforms. With the SMC, you can create mixed-signal test
systems with digitizers, arbitrary waveform generators, and other digital
waveform generator/analyzers, or you can synchronize multiple digital
waveform devices to build high-channel-count test systems.
Programmable voltage levels are needed when testing different
devices or when characterizing how a given device performs under
changing conditions. With NI 655x devices, the high and low levels for