17 Digital Channels
378 InfiniiVision 7000B Series Oscilloscopes User’s Guide
Best Probing Practices
Because of the variables L, di, and dt, you may be unsure how much
margin is available in your measurement setup. The following are
guidelines for good probing practices:
• The ground lead from each digital channel group (D15–D8 and D7–D0)
should be attached to the ground of the device under test if any
channel within the group is being used for data capture.
• When capturing data in a noisy environment, every third digital channel
probe’s ground should be used in addition to the channel group’s
ground.
• High- speed timing measurements (rise time < 3 ns) should make use of
each digital channel probe’s own ground.
When designing a high-speed digital system, you should consider designing
dedicated test ports that interface directly to the instrument’s probe
system. This will ease measurement setup and ensure a repeatable method
for obtaining test data. The 01650- 61607 16- channel logic probe and
termination adapter is designed to make it easy to connect to
industry- standard, 20-pin board connectors. This probe consists of a 2 m
logic analyzer probe cable and a 01650- 63203 termination adapter that
provides the proper RC networks in a very convenient package. Three
20- pin, low- profile, straight board connectors are included. Additional
board connectors can be ordered from Agilent Technologies.
To Next Page
Loading...
Need help?
General
