Agilent Technologies 54830 Series Service Manual page 41

Chapter 2: Preparing for Use
Digital probe lead set
Figure 2-11
Signal
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
(Figure 2-10) on the circuit board. The pinout of the 40-pin connector is shown in Figure 2-12.
Figure 2-12
40-pin Connector Pinout
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.
CA UT IO N
Do not exceed the maximum input voltage rating of ±40 V peak, CAT I. The isolation network
!
must be used on all digital channels for this to be valid.
For more information on digital probing solutions, search for the document titled "Probing
Solutions for Logic Analysis Systems" (Agilent part number 5968-4632E) on the Agilent
Technologies web site at www.agilent.com.
2–14
370 Ω
1.5 pF 7.4 pF
+5 V (see note) 1
Unused 3
Do not connect 5
D15 7
D14
9
D13
11
D12
13
D11 15
D10 17
D9 19
D8 21
D7 23
D6 25
D5
27
D4
29
D3
31
D2 33
D1 35
D0
37
+5 V (see note)
39
100 kΩ
2 Power Gnd
4
Signal Gnd
Signal Gnd
6
Signal Gnd
8
Signal Gnd
10
Signal Gnd
12
Signal Gnd
14
Signal Gnd
16
Signal Gnd
18
Signal Gnd
20
Signal Gnd
22
Signal Gnd
24
Signal Gnd
26
Signal Gnd
28
Signal Gnd
30
Signal Gnd
32
Signal Gnd
34
Signal Gnd
36
Signal Gnd
38
Power Gnd
40