HP 8360 L Series User Manual page 74

If an HP-IB error message is displayed verify that the interface
connections are correct. Check the HP-IB address of the power
meter and ensure that it is the same address the swept CW
generator is using (address 13 is assumed). Refer to the menu
map 8, System, for the key sequence necessary to reach softkey
Meter Adrs.
9. When the operation is complete, (a message is displayed)
disconnect the power meter/sensor. The swept CW generator has
stored the compensation information in its memory and is using it
to calibrate the detector's output voltage relative to power.
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