Transcript
OPTICAL N ETWOR K PRODUCTS
HLN3842A
NODE & NODE CONFIGURATIONS
PWRBlazer ™ II Optical Nodes HLN 3842A Standard Configuration Test Point
Test Point
H
Port 1
Test Point
L
NRM 3811
Test Point
NRM 3811
Port 2
H L Test Point
Test Point Port 3
H L
This easy-to-configure node consists of an ergonomic, rugged, die-cast aluminum housing. The housing supports an easy-to-use fiber management system, an easily replaceable power supply, an easily replaceable RF amplifier, and an optical board. The RF amplifier supports four bridger-level outputs. Each port has full return and powerpassing capability. Each RF return path signal can be individually muted by a transponder-controlled return mute switch which allows the system operator to remotely isolate the source of ingress to the plant. The HLN 3842A comes standard with an NRM 3811 optical receiver module. The optical board allows mounting of an additional forward receiver which can be used for fiber redundancy (A/B switching) or delivery of narrowcast services. The return from the output ports can be combined onto a single return transmitter or split between two return transmitters. The change from single forward receiver to dual receivers and from single to dual return can be made easily in the field at any time in a matter of minutes. This allows increased system reliability and scaling of the return bandwidth as traffic demands increase. The HLN 3842A uses the same return transmitters as Harmonic’s PWRBlazer Scaleable Node (HLN 3844A). A full range of transmitters, using various laser technologies, is available, allowing for the initial installation of a low-cost return transmitter, while providing for easy upgrades in the future.
Test Point
NTM 324x
Test Point H L
NTM 324x Return Fiber Out = Location for plug in pad
Test Point = Low-pass filter
= Transponder Controllable Mute Switch
Port 4
The HLN 3842A addresses the need for a compact, costeffective node with moderate flexibility. This flexibility enables the HLN 3842A to economically deliver today’s broadcast services while easily upgrading in the future to support modest additional services.
Power Supply
Forward Fiber In
NMT 5042
Pr o d u c t D e s c r i p t i o n
= Location for plug in slope equalizer
= Location for plug in return amplifier
Ad v a n t a g e s • Compact, rugged die-cast aluminum housing allows outdoor strand, wall or pedestal mounting. • Up to four high-level outputs for cost-effective network design. • Separate RF slope and level control provide maximum flexibility in network design. • Segmentable return path allows for increasing the return bandwidth in the future. • Built-in return mute for troubleshooting return ingress, remotely controllable via NMS. • Optional status transponder allows remote monitoring to ensure network reliability. Ap p l i c a t i o n s • Fiber-deep networks • Distribution
HLN3842A
PWRBLAZER II OPTICAL NODE
Models
Ac c e s s o r i e s Operating Band (MHz) Return Forward 5-30 46-870 5-42 53-870 5-42 53-870 5-50 70-870 5-65 85-870
Model HLN 3842A-30-AS HLN 3842A-42-AS HLN 3842A-42-US HLN 3842A-50-AS HLN 3842A-65-AS
Output Ports 4 4 4 4 4
Optical Connector SC/APC SC/APC SC/UPC SC/APC SC/APC
Optical Input Optical Input Range Wavelength Range Optical Return Loss Detector Noise Detector Responsivity
Up to +3 dBm 1310±20 nm and 1550±20 nm > 40 dB < 8 pA/√Hz > 0.85 A/W
Pads Equalizers Return Transmitter
Forward Optical Receiver Return Amplifier Configuration Modules
R F Output Housing Bandwidth 1000 MHz Output Level 46 dBmV/ch minimum on each port at an optical input of 0 dBm with 3.7% modulation index per channel with 0 dB pads and jumpers in place of equalizers C/CSO 70 dB1 C/CTB 71 dB1 Output Port Impedance 75 Ω Return Loss >16 dB over operating band Frequency Response2 ±0.75 dB over the operating band Slope (870/46MHz) 0 to +3 dB Group Delay <5 nsec/MHz Carrier-to-Hum Modulation 60 dB Output Stability ±1 dB over the operating temperature range
R e t u r n Pa t h Frequency Response ±1 dB Maximum loss from each port to input of return transmitter with 0 dB pads installed 10 dB Isolation between the forward RF output and input to return transmitter (5 - 200 MHz) 60 dB Return Input Port Impedance 75 Ω Group Delay <5 nsec/MHz
Po w e r Consumption ≤100 W 15 A pass current on all RF ports Operating Input Voltage Range: 40 - 95 VRMS, 47 - 70 Hz Quasi-Square Wave Operating Peak Input Voltage 115 V Sum (Sine + Square) Start-up Input Voltage 35 - 40 VRMS Turn off Input Voltage Low End 33 - 38 VRMS (2 VRMS below start-up input voltage) High End >95 VRMS Input Frequency Range 47 - 70Hz Input Voltage Protection Bellcore GR-1089-CORE Surges and Transients ANSI/IEEE C62.41-1991
Harmonic Inc. 549 Baltic Way Sunnyvale, CA 94089
Tel: +1.408.542.2500 Fax: +1.408.542.2511 www.harmonicinc.com
Service Cable Status Transponder
NPD 38xx NLE 3xyy, NCE 3xyy, NCS 3xyy, and NLS 3xyy Optional; any of NTM 3244, NTM 3245, NTM 3246, NTM 3248, NTM 3248L, NTM 3249 and/or NDT 3048A and/or NDT 3049A NRM 3811 NRP 3202 NCM 3800 (forward jumper), NCM 3802 (forward A/B switch), NCM 3804 (forward diplex filter), NCM 3806 (filter combiner), NCM 3808 (filter combiner), NCM 3200 (return jumper), NCM 3201 (return combiner) Optional NMT 5041
User Interface Red LED indicates received optical power < –6 dBm Green LED indicates power ON Test point indicates received optical power as 1 V/mW at 1310 nm AC input voltage test point DC supply voltage test point Ground test point RF test points as indicated on block diagram. All RF test points on RF tray are –20 ±1 dB directionally-coupled; GSK connectors. Forward test point for each port is accessible from outside the housing. Jumper to pass/block power for each port.
Physical Dimensions Weight Mounting
16.625” x 10.275” x 8.5” 17 lbs. Strand, wall, or pedestal
Environmental Operating Temperature Range –40 to 60° C Relative Humidity 0 to 100% Notes: 1. Typical for 77 channels with 46 dBmV (at 750 MHz) with 10 dB linear slope. Not including optical link. 2. After correcting for slope.
Copyright Harmonic. 2002 All rights reserved. The Harmonic name and logo are registered trademarks of Harmonic Inc. The names of other companies and products mentioned herein may be trademarks of their respective owners. Specifications are subject to change without notice. 20326-05 05/01
