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Connecting the DUT Power Supply Cables

Connecting the Power and GPIB Cables

Plug the DUT Power Supply’s power cord (8120-5244)

into the nearest power outlet box, with the proper

voltage, in the testhead or support bay. In the 79000, the

power outlet for the DUT power supplies is at the rear of

the pod. The power outlet boxes in the Series I, Series

II/3 testhead shipped prior to June 1999 do not always

have the same voltage. Each outlet box is marked with

its voltage. The recommended location to plug in DUT

power supplies varies with the system type and system

power option. The

Repair Manuals, Chapter 1,

"Troubleshooting" contains tables which show desired

the desire location to plug in DUTS for load balancing

for all system types and power options. The

Site Prep

Manual, Appendix B, "Power Reduction Conversion"

has diagrams showing the same information for Series 3

systems shipped after June 1999.

Add GPIB cables (8120-3444) by connecting them to

existing supplies. The DUT supplies handshake faster

than most other devices on the bus. If they are cabled

directly to the controller, the glitches they generate can

cause GPIB timeout errors.

NOTE

In 3070 systems, the DUT Power Supply GPIB

cables must be at the end of the GPIB cable string

(see

Figure 36 on page 70) to prevent GPIB

timeout errors.

In 79000 systems, due to the E1421A VXI

mainframe being on the GPIB bus, the DUT

power supplies can be connected as shown.

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Agilent Technologies 6634A Manual do Utilizador Página 72