Power Up the FPM 101
The power button provides two functions:
•Press and hold the power button, 
, for a short time until the display lights up to turn the meter on. When the meter is on, press and release the button to turn the FPM 101 off.
•Press and hold the button when the meter is on to disable/enable the
•If the
•If the
Wavelength/Backlight Button
The wavelength/backlight button, λ provides two functions:
•Press and hold to toggle the backlight on or off.
•To manually select a wavelength, press and release to cycle through the wavelengths as shown.
850 nm >1300 nm >1310 nm >1490 nm >1550 nm >850 nm ...
NOTE: When using the FLS 101 set to a WAVE ID output, the FPM 101 
automatically switches to the WAVE ID wavelength. The WAVE ID indicator
appears on the display and the wavelength is displayed in the calibrated wavelength indicator field.
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WAVE ID |
| WAVE ID | nm |
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Indicator |
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Calibrated
Wavelength
Indicator
Calibrated
Wavelength
Indicator
Single or Dual WAVE ID Mode
dB/dBm/μW Button
dB
The dB/dBm/uW button, dBm , provides two functions:
•Press and release to toggle display readings between insertion loss (dB) or power (dBm).
•Press and hold to view power in microwatts (μW).
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REF | dB dBm | |||||
WAVE ID | nm | |||||
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Power (µW)
Power (dBm) or Insertion Loss (dB)
Single and Dual WAVE ID mode
Fiber Optic Test Meters • Operation | 6 |