Fiber Optic Design Guide - Maite y Mario

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Troubleshooting Commercially available test equipment such as Blonder Tongue’s FOTK Fiber Optic Troubleshooting Kit are effective tools for locating problems with the fiber optic cables. The FOTK can also be used to verify that the transmitter is indeed putting out light. Other common problems include using a transmitter as a receiver and vice versa, lack of continuity in the optical fiber, lack of power (or reversed power), or improper input levels. The transmitter is optimized to accept a 1-Volt sync-to-white video input signal and two 1-Volt RMS audio signals. Larger inputs will introduce nonlinearities or interfere with function. Note that the transmitters and receivers are designed to work with a 75 Ω video system and a 600 Ω or 10 Ω audio system. If problems persist consult Blonder Tongue’s Systems Engineering Department. Problem Check Comments Check Tx/mux power If there are less than than +12 Volts connection and polarity. between pins J1-1 and J1-2, No optical power higher current power supply is out of Tx/mux. required (at least 550 mA). If the voltage on pin J1-1 is negative with respect to the voltage on pin J1-2, reverse the power supply leads. Check power at the Tx/mux. If there is power present at the No optical power Tx/mux, verify the proper fiber is at the Rx/demux. connected to Rx/demux. If the proper fiber is connected, ensure integrity of the fiber. Check optical power For this link to work properly, the Signal out of Rx/demux at Rx/demux. receiver requires a minimum input is noisy. power of -30 dBm. Be sure to ground the case of the transmitter and receiver. Verify signal input at Tx/mux. Must be 1-Volt sync-to-white. Check Rx/demux power If there are less than +12 Volts connection and polarity. between pins J1-1 and J1-2, a higher No signal out of Rx/demux. current power supply is required (at least 550 mA). If the voltage on pin J1-1 is negative with respect to the voltage on pin J1-2, reverse the power supply leads. Verify input signal at Tx/mux. Must be 1-Volt sync-to white or less. Larger signal will cause distortion. Verify fiber size. Fiber should be 62.5/125 µm for Signal out of Rx/demux multimode models and 9/125 µm for is distorted. SM Models. Larger core fibers may overload receiver. Verify that Rx/demux power is within specifications. Video signal amplitude Verify signal input at Tx/mux. Video signal must be 1-Volt out of Rx/demux is too sync-to-white. large or distorted. Verify Rx/demux video Add 75 Ω terminating resistor. output is terminated into 75 Ω. Verify signal input at Tx/mux. Audio signal must be 1-Volt RMS Audio signal amplitude Verify that the output is terminated out of Rx/demux is too into a 600 Ω or 10 Ω load. Add 600 Ω or 10 Ω terminating large or distorted. Do not connect either output resistor. to the ground. No Audio Output Verify switch 3 is set to baseband Switch 3 turns audio carriers “on” setting on Tx. and “off”. *Note: 850 nm video systems generally are bandwidth limited at distances over 1.5 km. When this occurs, the Rx/demux output will not be usable even when sufficient optical power is received. LABORATORIES, INC. The Standard of Quality in TV Signal Distribution Section 2 46 One Jake Brown Road, P.O. Box 1000 Old Bridge, NJ 08857-1000 USA (800) 523-6049 • (732) 679-4000 • FAX: (732) 679-4353 www.blondertongue.com
Blonder Tongue’s Diverse Fiber Product Line: • TRANSMITTERS Baseband Broadband L-Band • RECEIVERS Baseband Broadband L-Band • COUPLERS • MANAGEMENT BOXES • JUMPER CABLES Real Solutions For The Fiber World BASEB AND BROAD- BAND L- BAND RETRO-LINX TRAILBLAZER TWIN STAR Modular Package • All Baseband & Limited Broadband Transmitters & Receivers Available in Popular Micromod Housing • Compact Units Easily Integrate with Existing Headends • Video Only, Video/Audio/Audio Models Available • Limited Broadband Links Available in 5, 10, 15, 25 Channel Versions Fiber Node • Why buy separate fiber receivers & RF amplifiers when Blonder Tongue has integrated both units into one housing? • Trailblazer Node - Combination of a Fiber Optic Receiver & BIDA Amplifier; Output Ready for Distribution • Brings the Strength & Quality of the Headend Directly to the Remote Property! Multi-Output L-band • TWIN STAR, L-band Fiber Multi-Output Transmitters, Multi-Output Nodes • Transmitters Available in 8, 12, 16 Output Versions, Each with Remote Status Monitoring Via TTL Circuitry • Multi-Output Node Available with up to 24 Outputs from Only 1 Fiber Input! • True CATV Hybrid Amplifier in Each TWIN STAR Multi-Output Node • High Level/Low Distortion CATV Signals Diplexed onto Each Output for a True Single Wire Solution LABORATORIES, INC. The Standard of Quality in TV Signal Distribution One Jake Brown Road, Old Bridge, NJ 08857 (800) 523-6049 • (732) 679-4000 • Fax (732) 679-4353 • www.blondertongue.com
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Real Solutions For The Fiber World
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Fiber Optics E1-1 Overview Fiber Op
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Fiber Optics E1-3 Overview Fiber Op
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Fiber Optics E2-1 Fiber Optic VSB/A
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Fiber Optics E2-3 Example Fiber Opt
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Fiber Optics E3-1 FEATURES: FIBER R
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Fiber Optics E5-1 Integrated Fiber
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Fiber Optics E6-1 Rack Mount Fiber
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Fiber Optics E14-1 Rack Mount FM Vi
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Fiber Optics E15-1 Rack Mount FM Vi
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Fiber Optics E18-1 ORDERING INFORMA
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Fiber Optics E20-1 FILT Series L-Ba
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Page 35 and 36: Fiber Optics E24-1 FOTK Series Fibe
Page 37 and 38: Fiber Optics E26-1 Wavelength-Divis
Page 39 and 40: E28-1 Directory Of Blonder Tongue P
Page 41 and 42: LABORATORIES, INC. The Standard of
Page 55 and 56: * Input Level Chart Channel 9,10,11
Page 57 and 58: SIAT-M3T-31 1310 nm Standalone Base
Page 59 and 60: Stacked LNB, 950-2050 MHz FILT-S3A-
Page 61 and 62: Section 2 22
Page 63 and 64: DECEMBER 1998 REFERENCE ICON KEY P
Page 65 and 66: ST SC FC Picture 1.- Fiber Optic Co
Page 69 and 70: CONNECTIONS Transmitters Connector
Page 71 and 72: Stock No. 7404 Stock No. 7403 Figur
Page 73 and 74: TROUBLESHOOTING - CONTINUED Problem
Page 77 and 78: Troubleshooting Commercially availa
Page 79 and 80: Connections CNR vs Channel Loading
Page 83 and 84: Troubleshooting Commercially availa
Page 85: Performance Specifications - contin
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Fiber Optic Design Guide - Maite y Mario

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