Analog output gain – Bird Technologies ACMI User Manual
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Analog Output Gain
This setting controls the sensitivity of the two analog outputs on the ACMI. The
output level for the two channels are proportional to the measured power in
the forward and reflected directions. The output range is 0 to 5.0 V with 10 bits
of resolution. The gain settings allow the adjustment of the range at the cost of
resolution.
Example - At a gain of 1, the resolution is approximately 0.12% of
full scale. At a gain of 8 it is approx 0.015% of full scale.
The tables below show the forward and reflected range and resolution for the
100 W and 500 W ACMs for the various gain settings:
Table 1-1
100 W ACMI
Gain
Max (W)
Resolution (mW)
Max (W)
Resolution (mW)
1
125.00
122.0703
12.50
12.2070
2
62.50
61.0352
6.25
6.1035
4
31.25
30.5176
3.13
3.0518
8
15.63
15.2588
1.56
1.5259
Table 1-2
500 W ACMI
Gain
Max (W)
Resolution (mW)
Max (W)
Resolution (mW)
1
625.00
610.3516
62.50
61.0352
2
312.50
305.1758
31.25
30.5176
4
156.25
152.5879
15.63
15.2588
8
78.13
76.2939
7.81
7.6294