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When the reference calibration is complete, the Cali
-
bration menu is displayed.
External Reference Not Connected
If a calibration is attempted without an external
10 MHz reference signal connected to the rear panel
10 MHz REF IN connector, the instrument will beep
and the Calibration Status menu displays the fol
-
lowing message:
No External Reference is connected!!!
Reference
Loop
Bandwidth
The MG369XB provides a user selectable external
reference loop bandwidth. Bandwidths of 10 Hz,
30 Hz, 100 Hz, or 300 Hz can be selected from the
front panel system configuration menu. Selecting a
narrower bandwidth provides greater immunity
from reference related phase noise; however, refer
-
ence tracking will not be optimal. Selecting a wider
bandwidth increases phase tracking of the external
reference; however, it also increases the susceptibil
-
ity to reference noise.
To select an external reference loop bandwidth, first
connect the external 10 MHz reference signal to the
MG369XB rear panel 10 MHz REF IN connector.
3-90 MG369XB OM
Reference Loop Adjustments Local (Front Panel) Operation
NoExternalReferenceis Connected!!!