Appendix A Test Results
Link Stats results
268
HST-3000 Ethernet Testing User’s Guide
The Signal category is not applicable when testing 10/100/1G
electrical Ethernet.
Link Stats results
The Link Stats category lists link statistics such as the average
frame or packet rate, maximum frame or packet rate, and the
maximum, minimum, and average round trip delay measure-
ments. Results in this category accumulate after you transmit
layer 2 Ethernet, layer 3 IP, or layer 4 TCP/UDP traffic over the
link. Table 21 describes the results that appear in the Statis-
tics category.
Table 20 Signal test results
Result Description
SFP Valid Indicates whether the SFP is recog-
nized as a supported SFP (Yes, or No).
SFP Vendor Name Displays the name of the SFP vendor
(for example, JDS UNIPHASE).
SFP Id Displays the SFP ID (for example,
SX850).
Signal Level (dBm) Displays the signal level in dBm.
Table 21 Link Stats test results
Result Description
Delay, Avg (us) The average round trip delay calculated
in microseconds. Your near end HST
must originate an Acterna payload and
receive traffic from a far end JDSU
Ethernet test set (in loopback mode) to
measure delay accurately.
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