7-27
IM AQ1210-01EN
Using the Utility Feature
7
• Deleting Measured Data
10.
Tap the Delete Data soft key. A data delete soft key menu appears.
Deletes the measurement data of the selected
core number
When you delete data, the screen returns to the
Save Data menu after the data is deleted.
Deletes collectively the measurement data of
all core numbers
Explanation
The PON power meter features can be applied only to models with the /PPM option.
Wavelength
The wavelength when measuring the optical power of a PON system is shown below. It is different
depending on the transmission direction.
Transmission direction Wavelength
ONU -> OLT
1
1310 nm
OLT -> ONU
2
1490 nm and 1550 nm
1 Measures the optical power of the signal wavelength in the upstream direction, from the ONU (Optical
Network Unit: optical line termination on the subscriber side) to the OLT (Optical Line Termination: optical
line termination on the station side). Measures the optical power of the signal whose wavelength is 1310
nm (for data).
2 Measures the optical power of the signal wavelength in the downstream direction from the OLT to the
ONU. Measures the optical power of the signals whose wavelength is 1490 nm (for data) and 1550 nm (for
video).
Unit
Set the optical power display unit from the following.
dBm (absolute value), W (absolute value)
• Unt W is preceded by a prefix m (10
‒3
),
µ
(10
‒6
), n (10
‒9
), or p (10
‒12
).
• The following relation holds between the absolute display unit dBm and W.
P
dBm
= 10×log (P
w
×10
3
)
P
dBm
: optical power (unit dBm), P
w
: optical power (unit W)
Average Times
The average value is displayed as the measured value. Select the average count from the following.
1, 10, 50, 100
Offset
For each wavelength, you can add a specified value (the offset value) to measured input optical power
values and display the results as measured values.
The range is –9.900 to 9.900 dB.
7.4 Using the PON Power Meter (/PPM option)
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