User's Manual

Advanced RF Technologies, Inc.
60
Optic loss compensation should be performed when the color of “Commissioning” button is orange. The
“Commissioning” button will turn orange when the difference between the compensated attenuation and the
actual compensated attenuation level is greater than 1.5 dB. Optic compensation can be performed by clicking the
orange “Commissioning” button.
x The optic loss compensation for uplink and downlink are performed separately.
- The optic loss compensation for downlink will be performed based on the LD level of the ODU
and the PD level of the Master RU.
- The optic loss compensation for uplink will be performed based on the LD level of the Master
HRU and the PD level of the ODU.
x Optic loss compensation adjusts the attenuation based on Table 7-1 and the calculated optic loss (LD level-PD
Level).
- The calculated optic loss is displayed when a mouse is placed on the circle of each link. (Refer to
section 7.2.1.1)
- Based on the table below, when the calculated optic loss is 1dB, the attenuation will be set to
11dB.
- The attenuator for downlink optic loss compensation is located at the Master RU.
- The attenuators for uplink optic loss compensation are located at the ODU.
Table 7-1 Optic loss compensation table
Optic Loss (dBo) Compensated Attenuation (dB)
0
13
0.5
12
1
11
2
9
3
7
4
5
5
3
x Example: Let’s say that this ADX-H-ODU had previously been commissioned in a system where the optic loss
was 3 dBo. In the previous system, the correct amount of attenuation is 7dB. The ADX-H-ODU was moved to
another site and the new system has an optic loss of only 1dBo. At 1dBo of loss, the correct amount of
attenuation should be 11 dB. When this system powers on, optic commissioning will need to be performed
because the difference between the old attenuation level and the new attenuation level is 4dB which exceeds
the 1.5 dB threshold. Once optic commissioning is performed, it will set the attenaution level to 11 dB.