HP 16600A Series Installation Manual page 27

Probing
Probing
HP Logic Analyzer Modules
General-Purpose Probing
The signal and ground leads can be connected directly to the target system. This requires
installing 0.63 mm (0.025 inch) square pins, or round pins with a diameter between 0.66 and
0.84 mm (0.026 and 0.033 inch) directly on the board. You can also use an IC test clip with pins
with those dimensions.
You can also connect the leads using through-hole grabbers, which have small enough hooks
to fit around adjacent IC pins, or by using surface-mount grabbers designed for fine surface-
mount component leads.
Proper grounding will improve the signal quality and is essential for high speed measurements.
Each pod has a pod ground lead, which must be used. You can use only this ground, but signal
quality for high speed signals will be poor.
For better results, ground not only the pod, but every third or fourth lead.
For best results, and when probing signals with rise and fall times of 1 ns or less, ground each
probe lead with no more than a 2-inch ground lead as well as grounding the pod with the pod
ground lead.
You can replace damaged leads. Disconnect individual probe leads by pushing on the
latch at the lead base with a ball-point pen.
Connect grabbers to the leads by slipping the end of the lead over the recessed pin
located in the side of the grabber.
The minimum input overdrive is the greater of 250 mV or 30% of signal amplitude. The
maximum probe input voltage of each logic analyzer probe is 40 volts peak.
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