System Specifications
1 , 2
BER: 10-6
Dynamic Range: >35
RF Output at reciever: > 40 dBmV/ch
1 . Specifi cations for a 50 km of fiber + attenuator with 0 dBm on the re c e i ve r.
2. BER measured without Fo rw a r d Er ror Corre c t i o n .
Optical Output
Wavelength: 1549.32-1560.61 nm
Output Power: 8 dBm
Flatness: < 1 dB peak-to-valley
Laser shutdown: DISABLE/ENABLE switch
Eye protection: Safety shutter
Model Wa velength (nm)
HLD 7205-W00 1549.32 - 1560.61
HLD 7205-W01 1549.32
HLD 7205-W02 1550.92
HLD 7205-W03 1552.52
HLD 7205-W04 1554.13
HLD 7205-W05 1555.75
HLD 7205-W06 1557.36
HLD 7205-W07 1558.98
HLD 7205-W08 1560.61
RF Input
Input level range: 13 to 25 dBmV
Operational bandwidth: 5 to 200 MHz
RF attenuator adjustment range: 10 dB in 0.1 dB steps
Impedance: 75 Ω
Return loss: > 16 dB
Level control: Manual
User Interf a c e
Front panel:
Bi-state status LED: Normal = Green, Alarm = Red
Module selection indicator: Yellow LED
Function slide switch and set-up adjustment
Monitor point:
Laser RF drive monitor
Flatness: ± 1.5 dB
Return loss: > 16 dB
Connector type: Male GSK
Rear panel:
Laser ENABLE switch
Laser enabled: Yellow LED
HLD 7205
S p e c i f i c a t i o n s
© 1999 Harmonic Inc. Harmonic continues to improve and update all product designs.
Specifications are subject to change without notice. Harmonic and logo design, eXchange,
MAXLink, METROLink, NETWatch, PWRBlazer, PWRLink, TRANsend, and YAGLink are
trademarks of Harmonic Inc. Other names are trademarks or registered trademarks of their
respective owners. 2704-01 1K 01/00
Harmonic Inc.
549 Baltic Way
Sunnyvale, CA 94089
Tel. 408-542-2500
Tel. 800-730-4099
Fax 408-542-2510
Element Management System - NETWa t c h ™/ H E M
HEM interface: RS-485, RS-232C connectors (in HLP 4200)
Power Requir e m e n t s
Nominal: +24 VDC; supplied by HLP 4200 bus
Maximum: +28 VDC
Consumption: 26 Watts maximum
E n v i ro n m e n t a l
Operating temperature range: -20˚ to +65˚ C (+32˚ to 122˚ F)
Storage temperature range: –40˚ to +70˚ C (+32˚ to 158˚ F)
Automatic three speed fan adjustment at: 40˚ & 50˚ C (104˚ to
122˚ F)
Relative humidity: Maximum 85% non-condensing
Over temperature laser protection: Software and hardware
P h y s i c a l
Dimensions: 2.6˝ W x 4.4˝ H x 11.7˝ D
Weight: 3.6 lbs.
Mounting: HLP 4200 platform; one module slot
Optical connector type: SC/APC6
RF connector type: Standard F, RG-59 cable type
(accepts 0.51 - 1.06 mm center conductor diameter)
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)
