Cisco GainMaker Optoelectronic Node 1GHz with 42 54 MHz Split Guide De Montage
Forward Path Balancing for AGC Stations Using Manual Setup Mode
3 Turn the MANUAL BACKOFF potentiometer fully counterclockwise for
maximum gain.
4 Determine the outside temperature at the amplifier location.
5 Refer to the
5 Refer to the
Manual Backoff Chart (on page 55) to find the proper manual
backoff level for the current temperature and reference frequency.
6 Turn the MANUAL BACKOFF potentiometer clockwise to reduce the output
level by the amount specified in the Manual Backoff Chart.
Note: After making this adjustment, do not adjust the MANUAL BACKOFF
Note: After making this adjustment, do not adjust the MANUAL BACKOFF
potentiometer again.
7 Proceed to To Determine the Output Tilt.
Manual Backoff Chart
The following table displays the manual backoff level for selected frequencies and
various temperatures.
Temperature
445.25 MHz
Backoff level
547.25 MHz
Backoff level
870 MHz
Backoff level
1 GHz
Backoff level
60°C
140°F
0.0 dB
0.0 dB
0.0 dB
0.0 dB
55°C
131°F
0.4 dB
0.4 dB
0.6 dB
0.6 dB
50°C
122°F
.7 dB
.8 dB
1.1 dB
1.2 dB
45°C
113°F
1.1 dB
1.3 dB
1.7 dB
1.8 dB
40°C
104°F
1.5 dB
1.6 dB
2.2 dB
2.4 dB
35°C
95°F
1.9 dB
2.1 dB
2.8 dB
3.0 dB
30°C
86°F
2.3 dB
2.5 dB
3.4 dB
3.6 dB
25°C
77°F
2.6 dB
2.9 dB
3.9 dB
4.2 dB
20°C
68°F
3.1 dB
3.4 dB
4.5 dB
4.8 dB
15°C
59°F
3.4 dB
3.7 dB
5.0 dB
5.4 dB
10°C
50°F
3.7 dB
4.1 dB
5.5 dB
5.9 dB
5°C
41°F
4.1 dB
4.5 dB
6.0 dB
6.4 dB
0°C
32°F
4.4 dB
4.9 dB
6.5 dB
7.0 dB
OL-30035-03
55