Service manual

2-6 85330A Multiple Channel Controller

Performance Verification

Verifying the Multiple Channel Controller

This portion of the veriﬁcation will check the 85330 multiple channel switch

controller to ensure that it is operating correctly. It will also check the

Switch Control Unit of the Agilent 85331/2 to make sure that it is switching

correctly. Document the test results by plotting or printing the test

instrument screens as each test is performed.

Turn-On Turn the multiple channel controller ON; the following screen should

appear:

Select an instrument._

SYSTEM 85330A IBASIC

(see note below)

NOTE IBASIC is only present if the IBASIC option is installed.

If you see the above display, the unit has passed its turn on tests and is

working properly. If you do not see this display, load the 85330A

downloadable driver ﬁles as explained in the “Loading the Driver from a

Personal Computer” on page 1-6.

Voltage Check Check the voltage on the switch control unit’s OUTPUT connector. This is

the connector that is used to daisy-chain the switch control units together.

The voltages are shown in Table 2-2. If an external power supply is used to

bias the switch control units, the supply may require some adjustment to

keep the voltage within the tolerances.

Table 2-2 Switch Control Unit Voltages

Pin Voltage

E, L, V

+12 ±1.8 Vdc

−12 ±1.8 Vdc

F, M, W, b ground