HP E8402A, User And Service Manual, Page: 200 / 249

202 Calibrating and Verifying Performance
Chapter 4
CALibration:VALue:VOLTage <supply>,<value>
CALibration:VALue:VOLTage? <supply>
CALibration:VALue:VOLTage <supply>,<value> provides the enhanced monitor
with the externally measured voltages of the VXI power supplies measured at the
diagnostic connector of the mainframe. The value will be used to calibrate each
power supply-related measurement of the enhanced monitor. This value is stored in
non-volatile memory by the CAL:STOR command.
CALibration:VALue:VOLTage? returns the externally measured voltage stored for
the <supply> by the CALibration:VALue:VOLTage command.
Parameters
Returned Data
Note
Make certain you measure the power supplies at the pins labeled "VM" on the
Diagnostic Connector. These are high impedance lines to the power supplies.
Comments
•
The measurements made of each VXI power supply made at the Diagnostic
Connector should have an accuracy of 0.5%. Refer to
“Diagnostic Connector”
on page 42 for additional information on the Diagnostic Connector.
•
Optionally, you can also calibrate the measurements for the +5 volt external
supply (used for the RS-232 port) and the +5 volt standby supply. Measure the
supply voltages where they enter the mainframe (rear panel for the +5 volt
external, Diagnostic Connector for +5 volt standby). If these are not supplied,
the measurements will not be calibrated.
Name Type Range Default Description
< supply> enum. P5, P12, N12, P24,
N24, N5PT2, N2,
P5ST, P5EXT none Selects the VXI power supply.
< value> float64 allowed VXI limits
for each supply
+5 for P5,
+12 for P12,
-12 for N12,
+24 for P24,
-24 for N24,
-5.2 for N5PT2,
-2 for N2 Provides the external
measurement of each supply.
Type Range Default Description
float64 allowed VXI limits
for each supply Returns the stored external
measurement of each supply.