When the software does not detect a Downlink short preamble in the burst, this message is displayed on the screen. All Demodulation measurement results are cleared (‘--‘ is seen in the result area). The short preamble is required for all Demodulation measurements.
The short preamble is also required for the Power versus Time trace to be synchronized but if the preamble is not present, an unsynchronized time domain trace is displayed and all but the Channel Power result is cleared.
The instrument will continue to check for the presence of the short preamble.
DL Long Preamble not found
When the software does not detect a Downlink long preamble in the burst, this message is displayed on the screen. All Demodulation measurement results are cleared (‘--‘ is seen in the result area). The long preamble is required for all Demodulation measurements.
The instrument will continue to check for the presence of the long preamble
FCH decoder failed
This message is displayed when there is an error detected in the FCH decoder that is used to determine the base station ID.