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64 L4400 User’s Guide
3 Operating and Programming
Once the Visual Basic environment opens, start the program using the
“Start” arrow shown in Figure 3- 9. The program prompts you for the
instrument address as shown.
Figure 3-9. Changing the Address String (VISA COM Programs).
Using L4400 Instruments in Agilent 34980A Applications
The L4400 series LXI instruments have counterparts that are available as
plug- in modules for the Agilent 34980A Multifunction Switch/Measure Unit.
Table 3- 4 lists the L4400 series instruments and the corresponding 34980A
products.
Table 3-4. Agilent L4400 Series and 34980A Module Cross Reference.
IO address dialog box
“Start” arrow
L4400A Instrument
34980A Plug-In Module
L4421A: 40-Channel Armature Multiplexer
34921A
L4433A: Dual/Quad 4x8 Reed Matrix
34933A
L4437A: General Purpose Switch
34937A
L4445A: Microwave Switch/Attenuator
34945A
L4450A: 64-Bit Digital I/O
34950A
L4451A: 4-Channel Isolated D/A Converter
34951A
L4452A: Multifunction Module
34952A