Руководство По Установке для Cisco Compact Broadband Amplifier 93211 and 93221
4029501 Rev F
Operation
3-21
Using Temperature Back-off Feature
Introduction of Temperature Back-off Feature
The temperature back-off feature is used to off-set the attenuator and equalizer when
the amplifier is auto aligned at a non-room temperature, to allow the AGC module
working as at room temperature. This feature is used in auto alignment function
only, and is turned off when the auto alignment is completed.
the amplifier is auto aligned at a non-room temperature, to allow the AGC module
working as at room temperature. This feature is used in auto alignment function
only, and is turned off when the auto alignment is completed.
Notes:
45 dB cable loss at 1 GHz is used to simulate the network variation over
temperature (Reference: CommScope RG6).
temperature (Reference: CommScope RG6).
Room temperature is defined as 20℃.
Using Temperature Back-off Feature
To use the temperature back-off feature, set up the desired value in submenu “731
Cable Temp” as per instructions on page 3-18.
Cable Temp” as per instructions on page 3-18.
There are two ways to determine the temperature compensation needed.
1. When the amplifier‟s environmental temperature is very different from the
cable‟s environmental temperature, the user should enter the cable‟s estimated
environmental temperature manually, by selecting from the available values in
the submenu, including -20℃, -10℃, 0℃, 10℃, 20℃, 30℃, 40℃, 50℃, and 60℃.
If 20℃ is selected, the temperature compensation function is turned off.
environmental temperature manually, by selecting from the available values in
the submenu, including -20℃, -10℃, 0℃, 10℃, 20℃, 30℃, 40℃, 50℃, and 60℃.
If 20℃ is selected, the temperature compensation function is turned off.
2. When the amplifier‟s environmental temperature is about the same as the cable‟s
environmental temperature, the user can select AUTO in the submenu, and a
sensor inside the amplifier will measure and calculate the temperature
automatically.
sensor inside the amplifier will measure and calculate the temperature
automatically.