Agilent Technologies Infiniium 90000 A, Service Manual

Page: 27 / 148

Chapter 3: Testing Performance
Offset Accuracy Test
27
15
Set the channel 1 offset value to 400.0 mV. This can be done using the front panel control
or:
a Pull down the Setup menu and select Channel 1 or click the Channel 1 setup icon.
b Click the Offset control arrows to change the offset value or click on the offset value
and enter 400.0 mV in the dialog box.
c Enter 400.0 mV in the Enter Offset dialog box.
16
Set the Aux Out voltage (V
Aux Out
) to +400.0 mV as follows:
a
Pull down the Utilities menu and select Calibration.
b Change the Aux Output function to DC (top left corner).
c
Set the Level to 400.0 mV.
d Click on Close.
17
Press the Clear Display key on the scope, wait for the #Avgs value (top left corner of
screen) to return to 256 and then record the DMM voltage reading as V
DMM+
and the
scope Vavg reading as V
Scope+
in the Offset Gain Test section of the Performance Test
Record.
Channel 1
setup icon