Harmonic HRR 4104, Руководство по эксплуатации продукта

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HRR 4104 Return Path Receiver Product Manual Rev A (3/05) 4–1
4
Setting Up the HRR 4104 Receiver
This chapter describes how to set up the HRR 4104 Return Path Receiver for
optimum performance. Either of the user interface options described in
Chapter 3,
User Interface Options , can be used for receiver setup.
This chapter describes:
• Adjustment options
• The AGC function
• How to set up via the HLP 4200WD display
• How to set up via the NET 5200 NETWatch Site Controller
4.1 Adjustment Options
This section describes the features you can control within each specific
receiver (A, B, C, D) in the HRR 4104 module. Each setting applies only to
a single receiver. The factory default settings are provided in Section 4.1.9.
4.1.1 Optical Alarm Limit
The optical alarm limit is the threshold at which the optical alarm triggers.
When optical power input to the receiver drops below the optical alarm limit,
a low optical input alarm occurs. In addition, if the receiver is a primary
receiver, the receiver mutes its output and the backup receiver becomes
operational.
4.1.2 Input Wavelength 1550/1310 nm
The input wavelength adjustment allows you to choose between 1550 and
1310 nm.
The responsivity of the receiver changes depending on input wavelength.
Select the input wavelength to ensure the correct optical power reading.
If you are using C/DWDM in the return path, select 1550 nm.