ACCESSING OPM MODE
TEST PROCEDURES
Power on the Fiber OWL 7+.
Or, if meter is already powered on, press
MENU.
Press to POWER METER, then to
continue.
The meter will immediately begin to display optical power (dBm; ABS) or loss (dB; REL) readings.
OPM MODE
WAVE
OPM
WAVE:
1310
ENTER
LOW
1310nm ABS
dBm
AVAILABLE FUNCTIONS
Select next wavelength
Set optical reference
Toggle display units between dBm (optical power) and dB (optical loss)
Load a previously stored link (make sure that references are re-set before taking further
measurement)
Switch to SIMPLE OTDR mode (see OTDR section)
Return to STARTUP MENU
DISPLAYED RESULT
LOW
No measurable amount of incoming optical power
HIGH
Incoming optical power is too bright to be measured
(black)
Normal optical power/loss measurement
(blue)
INVALID OPERATING MARGIN (indicates invalid
“
negative loss
” or “
gain
” test condition;
recommended to re-set the reference using the ZERO
function)
WAVE
ZERO
UNITS
LOAD
OTDR
MENU
Possible causes for “LOW”:
– Test cable not connected to OPM port
– Light source not powered on
– Light source set to incorrect port
– Too much link loss
– Transmitter power too low
– No continuity
STARTUP MENU
CERTIFICATION MENU
POWER METER
SIMPLE OTDR
SETUP MENU
HELP TOPICS
SELECT
EXIT
BACK
Optical power meter without
storage mode