[2]
It is an arrow which indicates if the value exceeds (arrow pointing up) or does
not arrive (arrow pointing down) to the minimum levels in order to be
graphically represented.
[3]
Absolute optical signal power at the selected wavelenght. Absolute
measurement mode represents the absolute signal power value in dBm (dB
referred to 1 mW). Power measure is right only when the measured input
signal power is at the same wavelenght as selected in the instrument.
[4]
Relative signal losses (attenuattion) at the selected wavelenght. It is in dB. It
is equal to:
[5]
Signal status with respect to threshold values. Three status are possible:
LOW, PASS, HIGH.
[6]
Upper threshold value.
[7]
Maximal power value recommended for the selected wavelenght.
[8]
Selected threshold group of values. Threshold values are grouped and saved
on the memory of the instrument, then later they can be selected in order to
the quality criterium to meet.
[9]
Lower threshold value.
[10] Graphical representation of the power.
[11] Reference value from which is calculated the relative losses. Reference value
can be changed.
[12] Modulation frequency.
To navigate through the editable fields on the screen press SEL
selected field changes to shaded.
To edit the wavelenght or the threshold group, select it and press
[5].
To capture a new reference value, select the current reference value and press
both keys
and
To make or consult a logger refer to the section LOGGER Function.
4.2.3 OPTICAL LOSS TEST SET Function
This function measures signals emitted by a test source (e.g. PROLITE-105). It
measures the attenuation for GPON networks by identificating modulation of 270 Hz for
1310 nm, 1 kHz for 1490 nm and 2 kHz for 1550 nm. It should be used in combination
with a PROLITE-105. It shows on screen absolute measures, relative measures and
measurement with respect to the threshold value.
Page 14
ATTEN = Ref (dBm) - POT (dBm)
simultenously.
USER'S MANUAL. PROLITE-63
[4]. The
or
06-2011