Direct Connection Through 40-Pin Connector - Agilent Technologies 54831A User's Quick Start Manual

Setting Up the Oscilloscope
Digital probe lead set

Direct connection through 40-pin connector

The probe cable can also be directly plugged into various 40-pin connectors on
circuit board under test. This requires each signal pin of the 40-pin connector
to have an isolation network (Figure 1-12) on the the circuit board. The pinout
of the 40-pin connector is shown in Figure 1-14.
Figure 1-14
+5 V (see note)
Do not connect
+5 V (see note)
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.
C A U T I O 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.
1-20
1 2
Unused
3 4
5 6
D15 7 8
D14
9 10
D13 11 12
D12 13 14
D11
15 16
D10
17 18
D9 19 20
D8 21 22
D7
23 24
D6
25 26
D5 27 28
D4 29 30
D3
31 32
D2 33 34
D1 35 36
D0 37 38
39 40
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
Power Gnd