2
Installing the Probe
24
Keysight W2630 Series DDR2 DRAM BGA Probes Installation Guide
Connecting the BGA Probe to an Oscilloscope
How to Connect the Oscilloscope to “A” Series Probes
The BGA probes incorporate a set of pads to which oscilloscope probes may be soldered. Several
options are available for connecting an oscilloscope: solder-in probes or ZIF probes.
Solder-in probe
Use a high-bandwidth solder-in probe to connect the oscilloscope to the pads on the BGA probe.
The following probes are recommended:
• Keysight N5381A InfiniiMax II 12 GHz differential solder-in probe head. (Recommended for use
with 1130/31/32/34A InfiniiMax probe amplifier.)
• Keysight E2677A InfiniiMax 12 GHz differential solder-in probe head. (Recommended for use with
InfiniiMax II 1168A/69A probe amplifier.)
ZIF probe
An alternative is to solder a ZIF probe head onto the pads on the BGA probe and probe with a ZIF
probe tip. The following probe is recommended:
• Keysight N5425A 12 GHz InfiniiMax differential ZIF probe head with the Keysight N5426A 12 GHz
InfiniiMax ZIF Tip.
Where to Connect the Oscilloscope: W2631A
Where to Connect the Oscilloscope: W2631B, W2633B
The primary method of connecting the oscilloscope to the W2631B and W2633B probes is using the
W2639A adapter. See:
•
•
“Reworking the W2639A Adapter for W2631A/B and W2633A/B Probes"
There are, however, a few test points on the BGA probes for signals that are not available on the
W2639A adapter. The signal names are silkscreened by the test points.
Figure 10 W2631A pad numbering as seen through the board from the top side of the probe
48 GND
50 GND
52 GND
54 GND
56 GND
58 GND
60 GND
62 GND
64 GND
66 GND
68 GND
70 GND
72 GND
74 GND
76 GND
78 GND
80 GND
82 GND
84 GND
86 GND
88 GND
90 GND
92 GND
94 GND
DQ15 49
DQ8 51
DQ10 53
55
57
59
DQ7 61
DQ0 63
DQ2 65
DQ5 67
CK 69
CK# 71
ODT 73
RAS# 75
CAS# 77
CS# 79
A0 81
A2 83
A4 85
A6 87
A8 89
RFU#2 91
A11 93
46 A12
2 UDM
4 DQ14
6 DQ9
8 DQ11
10 DQ12
12 LDM
14 DQ6
16 DQ1
18 DQ3
20 DQ4
22 VREF
24 WE#
26 CKE
28 BA1
30 BA0
32 BA2
34 A1
36 A10
38 A5
40 A3
42 A7
44 A9
GND 45
GND 1
GND 3
GND 5
GND 7
GND 9
GND 11
GND 13
GND 15
GND 17
GND 19
GND 21
GND 23
GND 25
GND 27
GND 29
GND 31
GND 33
GND 35
GND 37
GND 39
GND 41
GND 43
GND 47
95 96
LDQS#
LDQS
DQ13
UDQS#
UDQS