ILT.2600
Does the pulse modulation feedthrough occur
only
below
2 GHz?
Continue
Go To
RF.2490
ILT.2601
Is Option 006 installed?
Go To
RF.3890
Go To
RF.4290
ILT.2610
Line related spurs are spurious signals oset from
the carrier by multiples of the line frequency. If, for
example, the line frequency is 60 Hz, line related spurs
can occur at 60, 120, 180, 240 Hz, and so on. The most
prevalent spur is the second harmonic.
The most likely cause of line related spurs is EMI
(electromagnetic interference) from other sources or
from poor grounding. EMI can occur as a result of
shielding degradation in the synthesizer due to damage
or faulty reinstallation of the top or bottom covers,or
the braided shielding. A faulty line lter (FL1) can also
cause spurs. Recheck the measurement and set up for
faulty grounds. Check the synthesizer shielding. Check
the environment for unusually strong line currents close
to the measurement.
If there is no likely external source, replace FL1. After
taking action, go to the Troubleshooting Foldout, block 1
(located just prior to the \Special Cases" tab).
Agilent 8360 Instrument Level Troubleshooting 1a-43
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