Main Parameters » History » Version 25

HAENNIG, Gerald, 12/14/2015 10:42 AM

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h1. 2.3 Main Parameters 
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This part lists the main specifications and highlights the main parameters to compare an optical link with a coaxial cable
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h2. 2.3.1 Optical link
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The optical link consists of :
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* Optical transmitter OTX1910 from the manufacturer lynx-technik : it modulates the intensity of the optical 1320 nm wavelength with the RF input signal ;
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* Monomode fiber 9/125 OS2 (to avoid dispersion effect) to optical signal on a distance up to 10 kilometers ;
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* Optical Receiver ORX1900 from the manufacturer lynx-technik : it detects optical wavelength intensity modulation and outputs the RF modulating signal.
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*Optical transmitter OTX1910*
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|_. Optical transmitter OTX1910	|_. min	|_. typ	|_. max	|_. Unit |_. comments |
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|Supply |=. 9 |=. 12 |=. 14 |=. V |=.  |
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|Current consumption |=. - |=. - |=. 450 |=. mA |=.  |
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|RF Input Connector |\3=. 75 Ohm F-type |=.  |=.  |
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|RF Return Loss |=. 14 |=. - |=. - |=. dB |=. |
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|RF Maximum Input Level |=. - |=. - |=. 15 |=. dBm |=.  |
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|RF Input Dynamic Range |=. -65 |=. - |=. -10 |=. dBm |=.  |
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|RF Input Frequency |=. 700 |=. - |=. 2300 |=. MHz |=.  |
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|Optical Connecctor |\3=. LC/PC single mode |=.  |=.  |
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|Optical signal wavelength |=. - |=. 1310 |=. - |=. nm |=.  |
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|Optical power level |=. - |=. 1 |=. - |=. dBm |=.  |
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*Fiber Monomode 9/125 OS2 (G.652.D ITU-T compliant), low dispersion at 1320 nm*
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|_. Fiber Optic |_. min	|_. typ	|_. max	|_. Unit |_. comments |
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| Optical Loss  |=. - |=. 0.3 |=. - |=. dB/km |=. 1320 nm |
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*Optical receiver  ORX1900*
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|_. Optical receiver  ORX1900 |_. min	|_. typ	|_. max	|_. Unit |_. comments |
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|Supply |=. 9 |=. 12 |=. 14 |=. V |=.  |
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|Current consumption |=. - |=. 240 |=. - |=. mA |=. |
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|Optical Input Connector |\3=. LC/PC single mode |=.  |=.  |
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|Optical input  signal wavelength range |=. 1270 |=. 1310 |=. 1610 |=. nm |=.  |
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|Optical input signal level range |=. -6 |=. - |=. 4 |=. dBm |=.  |
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|RF Output  Connector |\3=. 75 Ohm F-type |=.  |=.  |
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|RF Input Frequency |=. 700 |=. - |=. 2300 |=. MHz |=.  |
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*Overall Optical link with fiber length of 1 m*
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Lynx-technik technical provided us more technical specifications about the optical link. However, 
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sorry, we don't have any values for phase noise.
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And unfortunately we also don't have the tools to measure it in our lab.
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|_. Optical link with fiber length of 1 m |_. min	|_. typ	|_. max	|_. Unit |_. comments |
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|Noise Figure |=. - |=. - |=. 31 |=. dB |=.  |
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|Carrier to Noise Ratio |=. 55 |=. - |=. - |=. dB |=. Pin=-13 dBm, Fiber=1 m |
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|SFDR |=. 102 |=. - |=. - |=. dB/Hz2/3 |=. Pin=-13 dBm, IM3=50 dBc|
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|IIP3 |=. 12 | - |=. - |=. dBm |=. Pin=-13 dBm, IM3=50 dBc|
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h2. 2.3.2 Coaxial cable 
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*The optical link is a replacement of a coaxial cable EN50117-6 11PATC/PH 1.7/6.9 Class A 3GHz (B93) 17/13 139m.* 
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|_. COAXIAL CABLE |_. min	|_. typ	|_. max	|_. Unit |_. comments |
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|/12. RF Loss @ 20°C |=. - |=. 0.9 |=. - |/12. dB/100m |=. 5 MHz |
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| - |=. 2.7 |=. - |=. 50 MHz |
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| - |=. 3.8 |=. - |=. 100 MHz |
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| - |=. 5.4 |=. - |=. 200 MHz |
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| - |=. 7.7 |=. - |=.400 MHz |
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| - |=. 11 |=.-	|=. 800 MHz |
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| - |=. 11.5 |=. - |=. 862 MHz |
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| - |=. 12.1 |=. - |=. 950 MHz |
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| - |=. 14.6 |=. - |=. 1350 MHz |
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| - |=. 16.7 |=. - |=. 1750 MHz |
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| - |=. 18.7 |=. - |=. 2150 MHz |
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| - |=. 22.3 |=. - |=. 3000 MHz |
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| IIP3 |=. 50 |=. - |=. - |=. dBm |=. Estimation |
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IIP3 is only an estimation to be compared with optical link : this value is deemed quite conservative due to the fact the cable is a passive component.
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h2. 2.4 References
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lynx-technik