Power Measurement | 5-9
1. Open Loop Operation
In Open Loop Operation, input overdrive point changes based on the user input
attenuation. Once the input overdrive condition occurs, every 1 dB increase of the
input level causes a 1 dB increase in attenuation. If the input level exceeds -15
dBm the algorithm increases the attenuation to maximum.
2. AGC Operation
In AGC Operation, input overdrive point changes based on both user input
attenuation and any attenuation applied by the AGC loop. Once the input overdrive
condition occurs, every 1 dB increase of the input level causes a 1 dB increase in
attenuation. If the input level exceeds -15 dBm the algorithm increases the
attenuation to maximum.
3. ALC Operation
ALC Operation uses no input protection. The output level is automatically
controlled by the attenuators. As the input level increases, ALC attenuates to
maintain the same level.
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