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 (Stock No. 7491) 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 reverse power), or improper input levels. The transmitter is optimized to accept an input level as described in Table 1. Larger inputs will introduce nonlinearities or interfere with function, and smaller inputs will degrade the carrier-to-noise ratio. Note that the transmitters and receivers are designed to work with a 75 Ohm system. If problems persist consult the Blonder Tongue’s System Engineering Dept. Problem Check Comments No optical power out of Tx Check Tx power connection If there are less than 12 Volts between pins J1-1 and J1-2, a higher current power supply is required (at least 200 mA). If the voltage on pin J1-1 is negative with respect to the voltage on pin J1-2, reverse the power supply leads. No optical power at the Rx Check power at the Tx If there is power at the Tx, verify proper fiber is connected to the Rx. If the proper fiber is connected, ensure the integrityof the fiber. Signal out of Rx is noisy Check optical power at Rx See Table 1 for the input signal levels required to operate the units. Be sure to ground the case of the Tx and Rx. No signal out of Rx Verify the input signal at the Tx See Table 1 for the required input signal level. Check the Rx power connection If there are less than 12 Volts between pins J1-1 and J1-2, a higher current power supply is required (at least 110 mA). If the voltage on pin J1-1 is negative with respect to the voltage on pin J1-2, reverse the power supply leads. Signal amplitude out of Tx too large. Verify that the Rx output is terminated Add 75 Ohms terminating resistor. Verify into 75 Ohms. that the Tx input is within the specs given in Table 1. Signal out of Rx is distorted Verify input signal at Tx The Tx input must be within the specs given in Table 1. A larger signal will cause distortion. Verify fiber size Single-mode fiber must be used with this product. LABORATORIES, INC. The Standard of Quality in TV Signal Distribution Section 2 40 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
LABORATORIES, INC. The Standard of Quality in TV Signal Distribution Troubleshooting roubleshooting Guide FM Video Fiber Optic Links Transmitters Model Stock No. Model Stock No. MIAT-M8T-11 7441 SIAT-M8T-11 7441-S MIAT-M3T-11 7442 SIAT-M3T-11 7442-S MIAT-S3T-11 7443 SIAT-S3T-11 7443-S MIAT-S5T-11 7444 SIAT-S5T-11 7444-S Receivers Model Stock No. Model Stock No. MIAR-U8T-11 7451 SIAR-U8T-11 7451-S MIAR-U4T-11 7452 SIAR-U4T-11 7452-S PERFORMANCE SPECIFICATIONS Table 1.1 Section 2 41 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 Multimode Link Transmitter & Receiver Unless otherwise stated: @ T = 20°C, to + 70°C; VIN = +12 to +15 VDC; Video input per RS-250C Min. Typ. (@25°C) Max Units MIAT/SIAT-M8T-11 - 850 nm Model Optical Loss Range: 0 14 dB Optical Output Power (TX): -13.0 -12.0 dBm Optical Sensitivity (RX): -27.0 -30.0 dBm Optical Saturation (RX): +3.0 dBm S/N (Receiver Input = -21.5 dBm): 64 dB S/N (Receiver Input = -25.5 dBm): 58 dB S/N (Receiver Input = -27.0 dBm): MIAT/SIAT-M3T-11 - 1310 nm Model 47 53 dB Optical Loss Range: 0 15 dB Optical Output Power (TX): -16.0 -15.0 dBm Optical Sensitivity (RX): -31.0 -33.0 dBm Optical Saturation (RX): +3.0 dBm S/N (Receiver Input = -27 dBm): 64 dB S/N (Receiver Input = -30 dBm): 58 dB S/N (Receiver Input = -31 dBm): 47 53 dB NOTE: See Instruction Manual for more details.
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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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Page 33 and 34: Fiber Optics E22-1 Rack Mount Fiber
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Page 55 and 56: * Input Level Chart Channel 9,10,11
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Page 59 and 60: Stacked LNB, 950-2050 MHz FILT-S3A-
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Page 63 and 64: DECEMBER 1998 REFERENCE ICON KEY P
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Fiber Optic Design Guide - Maite y Mario

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