Cisco Cisco 1 GHz GainMaker Amplifier インストールガイド
Chapter 3 Balancing and Setup
72
If the output tilt is more than design tilt, replace the forward input EQ with a
lower value.
lower value.
If the output tilt is less than design tilt, replace the forward input EQ with a
higher value.
higher value.
3 Measure the output tilt again, and then return to step 1.
To Set the Output Level
After setting the tilt, complete the following steps to select the proper pad values for
the line extender. The output level of the line extender is set by selecting the proper
pad value.
the line extender. The output level of the line extender is set by selecting the proper
pad value.
Note: If you are setting the output level of a line extender that has not warmed up
for approximately one hour, skip to the To Set the Output Level for a Cold
Amplifier procedure below.
for approximately one hour, skip to the To Set the Output Level for a Cold
Amplifier procedure below.
To Set the Output Level for a Warm Line Extender
1 Connect the test probe to the forward output test point.
2 Measure the output level at the highest design frequency, and compare this level
1 Connect the test probe to the forward output test point.
2 Measure the output level at the highest design frequency, and compare this level
with the design level (on the design print).
3 Is the measured output level within
0.5 dB of the design level?
If the output level is within
0.5 dB of the design output level, proceed to
Balancing the Reverse Path (on page 77).
If the output level is more than the design output level, replace the forward
input pad with a higher value pad.
input pad with a higher value pad.
If the output level is less than the design output level, replace the forward
input pad with a lower value pad.
input pad with a lower value pad.
To Set the Output Level for a Cold Line Extender
After setting the tilt, complete the following steps to select the proper pad values for
the line extender. The output level of the line extender is set by selecting the proper
pad value.
the line extender. The output level of the line extender is set by selecting the proper
pad value.
Note: Using this procedure will result in a more accurate output level setting when
balancing a line extender using line extender and coax compensation mode if the
line extender has had little or no warm-up period.
balancing a line extender using line extender and coax compensation mode if the
line extender has had little or no warm-up period.
Important: For the most accurate output level setting, allow the line extender to
warm up for approximately one hour and use the To Set the Output Level for a
Warm Amplifier procedure above.
1 Connect the test probe to the forward output test point.
warm up for approximately one hour and use the To Set the Output Level for a
Warm Amplifier procedure above.
1 Connect the test probe to the forward output test point.