Agilent Technologies L4400 - Manual (Page 62)

50 L4400 User’s Guide
3 Operating and Programming
L4400 Instrument Rear Panel Overview
The rear panel of an L4400 series instrument is shown in Figure 3- 2.
Note that the ports and connectors available are based on the
instrument’s options and functionality.
Analog Bus Port
External Trigger/Alarm DIO Port
GPIB Interface
(optional)
LAN Port
Power
LAN Reset
Figure 3-2. L4400 Instrument Rear Panel (L4421A shown).
Analog Bus Port
The Analog bus port, available on the rear panel of the L4421A
40- Channel Armature Multiplexer Module and the L4433A Dual/Quad 4x8
Reed Matrix Module, allows signals to be routed to external instruments
such as digital multimeters (DMMs). There are four busses (ABUS1 -
ABUS 4) on the port. Figure 3- 3 defines each bus and corresponding pin
numbers.
1 5
6 9
ABus1 LO (pin 4)
ABus2 LO (pin 3)
ABus3 LO (pin 2)
ABus4 LO (pin 1)
Current
ABus1 HI (pin 9)
ABus2 HI (pin 8)
ABus3 HI (pin 7)
ABus4 HI (pin 6)
(2A Max.)
(L4421A only)
Figure 3-3. L4400 Analog Bus Port Pinouts.