Viavi 8100 V2 Series User Manual page 451

6 Press Yes in the dialog box to start reference and wait for the end of reference
measurement.
Once the reference is correct, the message "ready to start Measurement"
appears in the blue bar.
Figure 203 Example of a reference for a broadband source
A bargraph indicates the source power level
Low
If the reference measurement does not provide a correct result, check the
following potential causes:
Error message
Acquisition impossible
Hit any key to continue
Signal level too low!
Check source and connec-
tions.
Hit any key to continue.
High
Possible problem
Auto-calibration is not
completed
The OBS-5XX (or other
source) is not switched on
The OBS-5XX (or other
source) battery is too low
Defective connections
User Manual
Chapter 13 Attenuation profile
Possible solution
Wait for the calibration to be termi-
nated
Press the ON/OFF button to switch
on the source, verify if <Make refer-
ence> is still set to <Yes>, then repeat
step step 5
Check if the LOW-BATT red led is
lighted. If yes, then recharge the bat-
tery.
Check that the cables are properly
connected, and the notches on the
connectors are correctly aligned.
78000010220 Rev. 024
AP Reference Measurement
415