Oscilloscope Probes - Analog Devices Blackfin ADSP-BF537 Hardware Reference Manual

Oscilloscope Probes

When making high-speed measurements, be sure to use a "bayonet" type
or similarly short (< 0.5 inch) ground clip, attached to the tip of the oscil-
loscope probe. The probe should be a low-capacitance active probe
with 3 pF or less of loading. The use of a standard ground clip with
4 inches of ground lead causes ringing to be seen on the displayed trace
and makes the signal appear to have excessive overshoot and undershoot.
To see the signals accurately, a 1 GHz or better sampling oscilloscope is
needed.
Recommended Reading
For more information, refer to High-Speed Digital Design: A Handbook of
Black Magic, Johnson & Graham, Prentice Hall, Inc., ISBN
0-13-395724-1.
This book is a technical reference that covers the problems encountered in
state of the art, high-frequency digital circuit design. It is an excellent
source of information and practical ideas. Topics covered in the book
include:
• High-speed properties of logic gates
• Measurement techniques
• Transmission lines
• Ground planes and layer stacking
• Terminations
• Vias
• Power systems
• Connectors
ADSP-BF537 Blackfin Processor Hardware Reference
System Design
21-13