EXPRESS DAS
Installation and Operations Manual
120
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
13.3
Automatic Output Power Setting Function (Tx Output AGC)
To make it easier to set initial output power, you can set the output power to the desired level and turn on
the AGC function. The system will automatically set output power to this level.
After you set the AGC level, the RESULT window will indicate the outcome:
•
Success: The AGC function is properly completed.
•
Not Operate OPTIC Comp: Optic Comp is not executed.
•
Lack of ATT: There is no attenuation available.
If the result is not successful, the system will return the changed ATT to the initial ATT level.
13.4
Input Power AGC Function (Tx Input AGC)
Besides using a spectrum analyzer, you can also determine the input power value through the
management software’s power display window. You can use the Tx IN AGC function to automatically set
internal attenuation depending on the input level. The attenuation is automatically set based on -20dBm
of input. The table below shows Tx IN ATT as a function of the Tx IN POWER. For making these settings
manually, you can use the table to set the attenuation depending on the input level.
Tx IN POWER
Tx IN ATT
Tx IN POWER
Tx IN ATT
Tx IN POWER
Tx IN ATT
-20dBm
0dB
-9dBm
11dB
+1dBm
21dB
-19dBm
1dB
-8dBm
12dB
+2dBm
22dB
-18dBm
2dB
-7dBm
13dB
+3dBm
23dB
-17dBm
3dB
-6dBm
14dB
+4dBm
24dB
-16dBm
4dB
-5dBm
15dB
+5dBm
25dB
-15dBm
5dB
-4dBm
16dB
+6dBm
26dB
-14dBm
6dB
-3dBm
17dB
+7dBm
27dB
-13dBm
7dB
-2dBm
18dB
+8dBm
28dB
-12dBm
8dB
-1dBm
19dB
+9dBm
29dB
-11dBm
9dB
0dBm
20dB
+10dBm
30dB
-10dBm
10dB
Table 13.1 – Attenuation (ATT) Level Values
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