This message is displayed when the instrument has detected an external reference but couldn’t lock to the reference. It automatically switches to the Internal Reference.
When there is a lock failure detected from any of the internal LOs, this message is displayed. The xx is usually an error code in hex that can be interpreted by a service center to obtain more information on which LO had the failure.
When the software detects that the internal ADC is being overloaded, this message is displayed. Depending on the settings, either a “decrease input power” or “adjust range” message is also displayed with this message.
When the software detects that there is too much power outside the current frequency range, this message is displayed. This usually means that the instrument is currently tuned to a frequency with a very low amplitude signal or no signal and there is a strong signal at another frequency outside the current IF bandwidth.
When the software does not measure enough signal power at the input, this message is displayed. Measurement results are cleared (‘--’ is seen in the result area). The instrument will continue to check the signal power and start showing results when the power is increased.
