Description: A read-write string: The threshold, in exponential format, and the number of seconds in exponential format that the uncorrected BER must exceed this threshold are programmed by the user. An example of the format of the string is as follows: '1.2e-4 1.1e-1'. The first parameter is uncorrected BER threshold point, the second is the time in seconds that the threshold must be exceeded. In this example the threshold is set to 1.2 bits every 1000 and the time is set to 0.11 of a second. The single quote marks i.e. ' ' are not used in the command. Uncorrected BER is the bit error rate as measured before frame error correction.