Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
Forward Path Balancing for AGC Stations Using Manual Setup Mode
To Determine the Output Tilt
Complete the following steps to determine the output tilt of the amplifier.
1 Connect the test point adapter to the forward main output test point.
1 Connect the test point adapter to the forward main output test point.
2 Consult the design print to find the proper output tilt.
3 Measure the output signal levels at the frequencies you used in
3 Measure the output signal levels at the frequencies you used in
To Verify the
Input Signal Level (on page 51).
4 To determine the actual output tilt, calculate the difference (in dB) between the
levels of the lowest and highest specified frequencies.
5 Proceed to the next section, To Set the Output Tilt.
To Set the Output Tilt
Equalizers (EQs) are available in 1.5 dB increments. A 1.5 dB change in value
changes the difference between low and high frequencies by approximately 1 dB.
Increasing the equalizer value reduces the level at lower frequencies, relative to
the level at 870 MHz/1 GHz.
Decreasing the equalizer value increases the level at lower frequencies, relative to
the level at 870 MHz/1 GHz.
Complete the following steps to select the proper forward input equalizer value.
1 Compare the calculated output tilt in step 4 of To Determine the Output Tilt
1 Compare the calculated output tilt in step 4 of To Determine the Output Tilt
with the design tilt (on the design print).
2 Is the output tilt within ±0.5 dB of the design tilt?
If the output tilt is within ±0.5 dB of the design tilt, proceed to the next
section, To Set the Output Level.
If the output tilt is more than design tilt, replace the forward input EQ with a
lower value.
If the output tilt is less than design tilt, replace the forward input EQ with a
higher value.
OL-30326-02
57