1. Instrument Model
Keysight/Agilent E4428C Signal Generator
Fault phenomenon
Error 210.256.315.514; phase noise is poor.
UNLEVEL error
Testing process
According to the customer's description of the fault, we started to detect it. After disassembling the machine, we found that the instrument source module was seriously damaged, which caused the abnormal output fault.
Repair process
After confirming the fault, the engineer replaced the damaged components of the source module and adjusted the testing equipment of the entire machine.
5. Repair results
The fault phenomenon disappears and the instrument is repaired.
Precautions for using radio frequency instruments:
1. You must have a clear understanding of the various indicators of the instrument, be aware of them when using them, operate them in a standardized manner, and avoid various input and output operations that exceed the rated limits.
2. Pay attention to the matching of output impedance to avoid overload.
3. Pay attention to signal backfeed: No signal can be input into the output terminal. When high-frequency signal is output, the output terminal is prohibited from being open-circuited.
4. Take good electrostatic protection to prevent electrostatic damage.
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