OLP-5, OLP-6, OLP-8 4-7
Switch to dBm display as follows
⇒ If you are already in dB display mode, press
the “dBm/dB” key. (Toggle function)
Fig. 4-5 Absolute power level display in dBm.
Evaluation of unmodulated light (the
modulation frequency field is empty)
Absolute power level range
• OLP-5: -60 to +5 dBm
• OLP-6: -65 to +10 dBm
• OLP-8: -50 to +23 dBm
The display resolution is 0.01 dB;
resolution OLP-6 at < -60 dBm: 0.1 dB,
resolution OLP-8 at < -45 dBm: 0.1 dB.
During system power level measurements in
dBm display mode, unmodulated light is
evaluated. With modulated light sources, the
average power level is displayed.
Relative power level (dB)
When the relative power level or attenuation is
displayed, the current measured level is shown
with respect to a reference level:
The reference level must be recorded
beforehand; see Sec. 4.5.
EL dB[] ABS dBm[]REF dBm[]–=
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