HP 1652B Getting Started Manual page 103

14
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Pod Grounding
Each pod is grounded by a pod ground lead that should always be
used. You can connect the ground lead directly to a ground pm on your
target system or use a grabber. The grabber connects to the ground
lead the same way it connects to the probe lead. To connect the ground
lead to grounded pins on your target system, you must use 0.63 mm
(0.025 in.) square pins or round pins with a diameter of 0.66 mm (0.026
in)
to
0.84 mm (0.033 in).
Probes
The probe consists of a l2-inch twisted pair cable and one grabber.
The probe tip, which connects to the target system, has an integrated
R-C network with an input impedance of 100 kS): in parallel with
approximately 8 pF. See figure 24 below.
R-C NETWORK
EQUIVALENT CIRCUIT
I
I PROBE ~CABLE~ LOGIC ANALYZER ;
I I I
I
SIGNAL
GROUND
I
0166OBOQ
I
90: 9K
Figure 2-4. Probe Input Circuit
The other end of the probe has a two-pin connector that snaps into the
pod's probe housing. See figure 2-5.
.
R-C NETWORK
\
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2-5. Probe
HP 16528/1653B
Fro&Panel Reference
Probing
2-5