Overview
1–2
Copyright © 2006 Harmonic Inc.
•
Autosetup feature that adjusts RF pad for optimum modulation
performance
•
Automatic gain control and manual gain control modes of operation
Figure 1-1 shows front and rear panel features of the PWL 4100S transmitter
module.
Figure 1-1. PWL 4100S front and rear panel features
Transmitter performance is optimized by combining state-of-the-art 1310 nm
distributed feedback (DFB) laser technology and patented pre-distortion
linearization circuitry. Harmonic has designed the PWRLink II family for
integration into networks with advanced element management systems; each
transmitter module employs a microprocessor-based communication and
monitoring architecture. Figure 1-2 is a block diagram of the PWL 4100S
transmitter.
The transmitter’s microprocessor continuously monitors and controls all
critical transmitter parameters in order to optimize performance over both
time and temperature changes. The microprocessor-controlled parameters
include:
•
Input signal attenuation pad
•
Laser power, temperature, and bias
•
Electrical circuit temperature and setpoints
Status LED:
Bi-state LED
illuminates green when the
module is functioning properly, or
red during an alarm or power up
Select LED:
Yellow-colored LED
illuminates when the module is
selected through the front panel
display of the HLP 4200WD
RF Pad Adjustment
RF In:
Female
F connector
Optical Out
RF Monitor:
Monitor point for
RF signal at the
transmitter input
