METROLink™ HLD 7205 DWDM Return Tr a n s m i t t e r
H L 7 0 0 0 S e r i e s
P r oduct Description
Harmonic’s METROLink HLD 7205 is a family of high
performance DFB laser transmitter modules designed for return
path narrowcasting applications.. The DFB laser’s wavelength is
stabilized and aligned to one of eight wavelengths on the ITU grid
with 200 GHz (1.6 nm) spacing. By using Dense Wavelength
Division Multiplxing (DWDM), multiple return path signals can
be carried on a single fiber. The HLD 7205 transmitters can
operate alone or in combination with Harmonic’s METROLink
family of gain flattened optical amplifiers, and DWDM
multiplexers and demultiplexers for complete system solutions.
The HLD 7205 transmitter modules are compact, intelligent and
easily configurable by means of the user-friendly interface, allowing
for set-up in minutes. The transmitters can be set up via the HLP
4200WD platform front panel menu, the module front panel
function slide switch and set-up adjustment, or via the
NETWatch™Element Management System.
Continuous high performance and reliability of the transmitters are
assured by a microprocessor and associated firmware which control
and monitor all vital functions. Monitored functions include laser
temperature and operating point, optical power, module
temperature and composite RF drive level.
The optical components within the HLD 7205 transmitter module
have been designed for ease-of-use and maintenance. The module
features an optical connector on a removable plate on the back of
the unit, facilitating simple cleaning and maintenance.
A d v a n t a g e s
The innovative design of the HLD 7205 transmitter and
Harmonic’s complete line of METROLink products offer many
advantages to address the needs of today and tomorrow, making it
the industry’s leading solution for return path digital services:
■
DWDM offeres high-performance alternative to frequency
stacking.
■
Shares common platform with the METROLink gain flattened
EDFA, forward path transmitter and wavelength selected
broadcast transmitter.
■
Integrated element management with SNMP compatibility.
■
Microprocessor control of all key parameters provides consistent
and optimum product performance and monitoring.
■
200 MHz bandwidth provides flexibility in RF channel
allocation.
■
Unparalleled flat frequency response provides high performance
and efficient system integration.
■
Integrated RF pre-amplifier reduces transmitter drive level
requirements.
■
Simple “plug and play” operation reduces time and cost
of installation.
A p p l i c a t i o n s
■
Two-way HFC system
■
High-quality replacement for frequency stackers
■
Targeted digital services (Video on Demand (VOD), Internet,
cable telephony, IP telephony)
RF IN
OPTICAL
OUT
DANGER
INVISIBLE
LASER
RADIATION
AGC
Remote
MGC
METROLink Return Tx (WO1=1549.31 nm)