Fiber Optic Design Guide - Maite y Mario

FM Video/Audio Receiver 850nm/1310-1550nm - MIAR/SIAR-31 Series
“Move Your Video Channels From Sub Return Coaxial Plant To Fiber! Free Up Valuable Spectrum & Improve Picture Quality!” RETRO-LINX
SPECIFICATIONS
Optical And Power Min. Typical Max. Notes Units
MM 850nm
Optical Loss Range: 0 14 dB
Optical Sensitivity: -27 -30.0 1 dBm
Optical Saturation: +3.0 1 dBm
S/N (Rcvr Input = -21.5 dBm): 64 4 dB
S/N (Rcvr Input = -25.5 dBm): 58 4 dB
S/N (Rcvr Input = -27.0 dBm): 47 53 4 dB
MM 1310nm
Optical Loss Range: 0 15 dB
Optical Sensitivity: -31 -33.0 1 dBm
Optical Saturation: +3.0 1 dBm
S/N (Rcvr Input = -27 dBm): 64 4 dB
S/N (Rcvr Input = -30 dBm): 58 4 dB
S/N (Rcvr Input = -31 dBm): 47 53 4 dB
SM 1310nm
Operating Wavelength: 1280 1310 1340 nm
Optical Loss Range: 0 2.3 dB
Optical Sensitivity: -30 1 dBm
Optical Saturation: +3.0 1 dBm
S/N (Rcvr Input = -24 dBm): 62 4 dB
S/N (Rcvr Input = -28 dBm): 58 4 dB
S/N (Rcvr Input = -31 dBm): 47 51 4 dB
SM 1550nm
Operating Wavelength: 1520 1550 1580 nm
Optical Loss Range: 0 23 dB
Optical Sensitivity: -30 1 dBm
Optical Saturation: +3.0 1 dBm
S/N (Rcvr Input = -24 dBm): 62 4 dB
S/N (Rcvr Input = -28 dBm): 58 4 dB
S/N (Rcvr Input = -31 dBm): 47 51 4 dB
ALL MODELS (Multimode & Single Mode)
Power Supply Voltage: +12 +15 6 VDC
Power Supply Current: 500 550 mA
Required Fiber Bandwidth: 100 7 MHz
Video Bandwidth: 5 MHz
Video Low Frequency Response: 2 12 Hz
FM Carrier Frequency: 56 60 66 MHz
Video Input/Output Impedance: 75 Ω
Differential Gain Error: 1.7 5.0 %
Differential Phase Error: 1.3 3.0 ˚
Input Signal Range: 0.9 1.0 1.1 8 Vsync-white
Video Channel Gain: 0.9 1.0 1.1 9 V/V
FEATURES
E15-2
Low Cost/High Quality
FM Video/Unbalanced Stereo Audio
Transmission Over Optical Fiber
Meets/exceeds RS-250C Medium
Haul Specifications
Single Mode or Mulitmode
Versions Available
Audio Bandwidth 50 Hz-20 KHz
0-15 dB Optical Loss Range with
Multimode Fiber Using 1310nm
Optics
0-29 dB Optical Loss Range with SM
Fiber Using 1310nm or 1550nm
Optional High Power Optics
The MIAR fits in our MIRC 19”
Headend Chassis
The SIAR is Designed for Stand
Alone Applications
Unit Includes a Bi-color LED That
Indicates Optimum Optical Input Level
When Green And Red When Optical
Input is Low
Video/Audio
NOTES
1) All optical power levels are average values. The receiver includes a Loss-of-Signal indicator that is green when there is sufficient optical input and turns red when there is a loss of sufficient optical input.
Because the LED is always lit, it also serves as positive indication that the unit is receiving power.
2) Most parameters are relatively unaffected by varying temperature. The transmitter output power does drift considerably with temperature. In general, optical output drops at higher temperatures and
increases at lower temperatures. (Values for this specification are at 25 ˚C)
3) Multimode versions of the MIAT/SIAT-31 are optimized for use with 62.5/125 µm fiber, and all transmitter power levels are measured through 1 meter of 62.5/125 µm fiber. Most popular multimode fiber
sizes including 50/125 µm, 85/125 µm, and 100/140 µm can also be used. Following are the typical optical link budgets with different size fibers.
850 nm Model: ** Bandwidth limited typically. 1300 nm Model: Bandwidth limited typically.
Fiber Type Max Loss Typ. Distance Correction Factor Max Loss Typ. Distance Correction Factor
50/125 µm 12.0 dB 1.5 km 6.0 dB 17 dB 12 km 1 dB
62.5/125 µm 15.0 dB 1.5 km 3.0 dB 18 dB 8 km** O dB
100/140 µm 20.0 dB 1.0 km** -2.0 dB 19 dB 2 km** -1 dB
4) The signal-to-noise performance is given at three ranges of receiver input power. This allows the user to accurately predict how the link will perform in a given application. All signal-to-noise values are
NTSC weighted using the unified weighting network per RS-250C and limited to 4.2 MHz.
5) Single mode versions of the MIAT/SIAT-31 are optimized for use with single mode fiber, and all transmitter power levels are measured through 1 meter of 9/125 µm fiber. Most popular multimode fiber
sizes including 50/125 µm, 62.5/125 µm and 100/140 µm can also be used. Operating distance will be substantially reduced due to the limited bandwidth of these fibers compared to single mode fiber.
6) Supply voltage is DC ranging from + 12 Volts to + 15 Volts. Operation at higher voltage is possible, but the upper operating temperature of the part should be derated 5 ˚C for every Volt over + 15 Volts.
The units will tolerate moderate amounts of ripple, but this should not exceed 0.5 Volts peak-to-peak. It is critical that the supply voltage NEVER drops below + 12 Volts for any part of the waveform.
Voltages below + 12 Volts will cause the internal voltage regulators to lose regulation which will disrupt the operation of the unit and cause unpredictable results. The input of the unit is filtered with approximately
220 pF of capacitance. Power supplies with fast-blow fuses may trip when powering the links.
7) Be sure to compute your fiber bandwidth (end-to-end) as well as attenuation. This often gets overlooked by system designers. The fiber bandwidth is often quite low when 850 nm is used.
8) All specifications shown are met with an RS-250C video signal. A smaller input level will result in reduced signal-to-noise ratio while a larger input level will result in degraded differential gain and phase
performance.
9) Output level automatically tracks the input level within the specified tolerance regardless of optical loss.
Fiber Optics