Agilent Technologies E8401A, User And Service Manual, Page: 58 / 66

56 Agilent E8401A, E8403A Appendix A
Mains Power Installation
Category II
+5VSTDBY: Power may be provided by the user to the +5VSTDBY bus on
the VXI backplane.
Current:
1A Max
Voltage Range: 5.25V Max, 4.875V Min
Connector: Pins 8 and 21 of the Diagnostic Connector.
Chassis Ground Connection: M4 x 0.7 threaded nut insert on rear panel.
Cooling Specifications
High performance impeller provides cooling air to modules. Unique air
distribution system (patent applied) and positively-pressurized plenum
provide quiet operation and uniform airflow from slot to slot and from front
to rear of modules. Outstanding back pressure performance insures airflow
through dense modules. Separate power supply cooling fan(s) provides an
independent air path for reliable cooling of power supply.
Cooling
Specification Charts
•
VXI-8 Specification Draft 2.0. Fixture revision 1.7.
•
VXI-8 Standard Modules installed in all other slots.
•
Performance shown for Worst Slot (slot 1) and Best Slot (slot 10).
•
Front-to-Rear Variance 13% worst case. Typically 10%-12% in most
slots.
•
Fans on Full Speed. Minimum airflow is approximately 50% with
fans on Variable Speed.
•
Air Filter Kit not installed. Airflow is reduced approximately 10%
with clean air filters installed.
•
Measurements taken at 1,500m altitude.
3.0
2.0
1.0
5.0
2.0 4.0 6.0 8.0 10.0
Airflow Through Module (liters/sec)
0.0
Worst Slot
Pressure Drop
Across Module
(mm H
2
0)
4.0
Best Slot
12.0