Repair of Keysight signal generator N5183B self-test error case

1. Instrument Model

Keysight N5183B Signal Generator

2. Fault phenomenon

The customer reported that there was a problem with the power of the instrument

3. Testing process

After receiving the instrument, the engineer turned it on for specific testing. First, the instrument performed an internal self-test and found 16 errors, including the output UNlevel above 3.2G, the amplitude was 10 dBm lower, and the output UNlock at 3.6G/7.2G. With so many faults, this instrument is truly a "critical patient". With so many problems found, the Antai network analyzer maintenance engineer will take you to see what went wrong;

4. Maintenance process

After disassembling the instrument for inspection, we found that the RF board of the instrument was seriously damaged. If it was repaired at the original factory, the entire RF board would have to be replaced, and the repair cost would be very high. Our engineers repaired the RF board at the chip level, saving customers most of the repair costs.

5. Post-repair inspection: Turn on the machine for self-test, eliminate all error messages, and repair faults.

This type of radio frequency instrument is generally not prone to malfunction, and most instrument failures are caused by improper use.

Precautions for use:

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.