This attribute specifies the name of the file with the upstream triggered spectrum capture data at the CCAP that is to be transferred from the CCAP using TFTP to the PNM server or other TFTP client. The content of the sample data file transferred from the CCAP using TFTP is the same as the content returned in attribute Output of the corresponding Result table. If the value of this attribute is an empty string, then a default filename value will be used. Otherwise, the value set will be used as the filename. If a default filename is generated, then that value will be returned in this attribute and will represent the filename that was used for the test. All subsequent tests should set this attribute to a meaningful value or to an 'empty string' value (to generate a new default filename) before starting a new test. If a default filename value is used, it is generated as the test name, plus a unique CCAP identifier (either a loopback address (IPv4 or IPv6) or FQDN), plus the 'epoch time'. The epoch time (also known as 'unix time') is defined as the number of seconds that have elapsed since midnight Coordinated Universal Time (UTC),Thursday, 1 January 1970. Hence, the format would be: PNMCcapUsTrigSpecCapt_<Unique CCAP Identifier>_<epoch> Hence, the upstream spectrum sample capture filename format would be as shown in the following example: PNMCcapUsTrigSpecCapt_ccap1.boulder.cablelabs.com_1403405123 Refer to the Reference for the Format of upstream triggered spectrum capture file.