Keysight Infiniium 8000 Series, Руководство по обслуживанию

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Chapter 2: Preparing for Use
Digital probe lead set
30
Figure 2-12
Equivalent Load including oscilloscope
Direct connection through 40- pin connector
The probe cable can also be directly plugged into various 40- pin connectors on the
circuit board under test. This requires each signal pin of the 40- pin connector to have
an isolation network (see Figure 2- 11) on the circuit board. The pinout of the 40- pin
connector is shown in Figure 2- 13.
Figure 2-13
40-pin Connector Pinout
C A U T I O N
Do not exceed the maximum input voltage rating of ±40 V peak, CAT I. The isolation
network (see Figure 2- 11) must be used on all digital channels for this to be valid.
For more information on digital probing solutions, search for document number 5968-
4632E on the Keysight Technologies web site at www.keysight.com. This document is
titled “Probing Solutions for Logic Analysis Systems.” It appears under the heading
Note: +5 V is supplied by the oscilloscope to provide power for the demo board. DO
NOT connect these pins to the circuit board under test.
370
Ω
7.4 pF 1.5 pF
100 k
Ω
Signal
D0 37
D1 35
D2 33
D3 31
D4 29
D5 27
D6
25
D7
23
D8
21
D9 19
D10 17
D11 15
D12 13
D13 11
D14 9
D15
7
Do not connect
5
Unused
3
+5 V (see note) 1
+5 V (see note)
39
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
40
Power Gnd
Power Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
Signal Gnd
!