Harmonic HRR 4104, Руководство по эксплуатации продукта

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Setting Up the HRR 4104 Receiver
4–2 Copyright © 2005 Harmonic Inc.
4.1.3 Mute
When the HRR 4104 is in a primary/backup configuration, by default, the
primary HRR 4104 module is active and the backup module is muted
(inactive). This is the unforced mute setting.
Forcing the primary receiver into mute status deactivates the primary receiver
and (in a redundant pair configuration) activates the backup receiver. This can
be useful when there is a problem with the primary receiver or for
troubleshooting.
4.1.4 AGC Mode
Each receiver of the HRR 4104 has two gain control modes:
• AGC mode enabled—automatic gain control (AGC) mode
• AGC mode disabled—manual gain control (MGC) mode
Gain control affects the output power from the receiver.
When AGC is enabled:
• The RF pad adjusts automatically, controlling the output of the module
based on the optical input.
• You can set the RF pad setpoint, and maximum and minimum pad limits.
When AGC is disabled:
• You must manually set the RF pad to control the output of the module.
4.1.5 AGC Pad Setpoint
When AGC is enabled, you can set the receiver’s RF pad. The default value is
the manual RF pad value at the time AGC is enabled. For further information,
see section
4.2 Understanding the AGC Function on page 4-3.
4.1.6 AGC Optical Setpoint
When AGC is enabled, you can set the reference input power for the
receiver. The default value is the optical power level at the time AGC is
enabled. For further information, see section
4.2 Understanding the AGC
Function on page 4-3.
4.1.7 AGC Pad Maximum/Minimum
When AGC is enabled, you can enter an upper and a lower limit on the
amount of gain. AGC pad maximum is the maximum pad value allowable.
AGC pad minimum is the minimum pad value allowable.
If you enter a value for the AGC RF pad setpoint that exceeds the AGC pad
maximum or minimum, the AGC pad maximum/minimum adjusts
automatically.
For further information, see section 4.2 Understanding the AGC Function on
page 4-3.