Atec Agilent-346a - Manual (Page 8)

8
General-Purpose Probing
Wedge Adapters
The Agilent Technologies Wedge
technology provides very reliable
probing of a few channels on
0.5 mm and 0.65 mm pitch QFPs.
No clear area is required around
the device. Each Wedge of the
probe slides between the legs of
the QFP. The side of each Wedge
probe contacts the package legs.
An insulation core electrically
isolates the sides of each Wedge
(see Figures 2.1 and 2.2). Various
3-signal, 8-signal, and 16-signal
probes are available (see Table 1).
Figure 2.1. Three-signal Wedge
electrical connection
Figure 2.2. Eight-signal and 16-signal Wedge (16-signal Wedge has a common ground plane)
Top view of 16 signal pins Bottom view of 16 ground pins (connected to common ground plane)
Ground connector pins
Wedge connector pins
Removable jumper
1
Gaps
16
Miscellaneous Probing Accessories
The ferrite core assembly can be
added to the probe cable to sup-
press EMI and RFI noise that can
corrupt the measurement.
Figure 2.3. Ferrite core assembly, 16555-60001
IC Leg Number Number Model
Spacing of Signals of Wedges Number
in Pack
0.5 mm 3 1 E2613A
0.5 mm 3 2 E2613B
0.5 mm 8 1 E2614A
0.5 mm 16 1 E2643A
0.65 mm 3 1 E2615A
0.65 mm 3 2 E2615B
0.65 mm 8 1 E2616A
0.65 mm 16 1 E2644A
Table 1. Wedge probe adapter