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FTTx – In Service OTDR Test Settings screen
This screen is used to congure FTTx – In Service to:
• test the customer drop ber only
• or test through the splitter
When Test [Through Splitter] is selected, the user must specify the PON split ratio. Available PON
split ratio settings are 1x8, 1x16, 1x32, and 1x64. If cascaded splitters are used and you wish to see
through both, multiply together the larger numbers of the two cascaded splitters and use this value to
select the PON split ratio.
Example: Cascaded 1x4 and 1x8: Multiply 4 and 8 = 32. Select PON split ratio of 1x32.
FTTx – In Service Test Mode Settings (OFL280-103 only)
In the FTTx – In Service mode (available only in the OFL280-103 model) the rst page displays received
FTTx PON power at 1490 and 1550 nm. On dark bers users can test at 1310/1550 nm. On live bers
users can test only at 1625 nm.
In all other models, if users try to test a live ber, a warning message is displayed and users are not
allowed to continue the test.
• If a live ber is detected, the ‘Live Fiber’ screen is displayed (OFL 280-103 only). Press the -
Test key to continue testing at 1625 nm
• If a live ber is not detected, an OFL280-103 OTDR will continue testing at the selected wavelengths.
Press to display OTDR
Test Settings screen
[Freeze]/[Unfreeze] holds/resumes
updating power readings continuously
Press to toggle display of power in
dBm or Watts (mW, uW, nW)
Press to display PON power meter screen
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