Exfo PM-1100 Optical Power Meter Instrukcja Użytkownika Pobierz pdf (Strona 27)

Operating the Optical Power Meter

Optical Power Meter 17

Relative Power

When you access relative mode, the Optical Power Meterdisplays the last

reference value entered at the current wavelength. One reference value

can be stored for each wavelength in the shortlist and will remain in

memory until a new reference value is stored at the same wavelength.

However, if you use dB/ΔW, the reference value will be converted from

dBm to watts (and vice versa) when the measurement unit of the relative

power toggles between dB and watts.

Note: If you set a reference while an offset is active, the reference measurement

will take into account the offset (only when using dB measurement units).

Entering the Current Power as the Reference Value

The power of the signal currently received at the detector can be stored as

the reference value.

To enter the current power as the reference value:

1. Use λ to select the wavelength.

2. Use dBm/Watt to select the measurement units.

3. Press Ref.

Relative power

Unit of measurement

for the relative power

Reference value

Unit of measurement

for reference value

A delta symbol indicates

that the PM-1100 is in relative

mode and measuring in watts.

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Exfo PM-1100 Optical Power Meter Instrukcja Użytkownika Strona 27