Keysight U3606B Mode D'emploi page 160

4 System-Related Operation
The dBm function is logarithmic, and is based on a calculation of power delivered
to a reference resistance, relative to 1 mW. The following procedure shows you
how to select an appropriate dBm reference resistance value. The factory default
dBm reference resistance value is 600 Ω .
Press [ ] or [ ] to change the dBm reference resistance value (0001 Ω to 9999 Ω).
Performing a self-test
A power-on self-test occurs immediately when you turn on the instrument. This
limited test assures you that the U3606B is operational.
The following procedure shows you how to perform a more extensive self-test.
A complete self-test performs a series of internal tests, and may take up to 30
seconds to complete. For remote interface operation, refer to the *TST command
in the U3606B Programmer's Reference.
Before performing the complete self-test, ensure that all test leads are
CAUTION
removed from the input and output terminals.
Press [ ] or [ ] to select "YES" and then press [Shift] > [Save] to save. The
instrument will automatically exit the Utility menu and execute the self-test.
If the self-test is successful, the U3606B will return to normal operation.
If the power-on or complete self-test fails, the Error annunciator illuminates, and
an error is stored in the error queue.
160 Keysight U3606B User's Guide