|Gross data rate
||Full duplex (half duplex also supported)
||1.25 km with 130mm RX loupe lenses and 90mm TX loupe lenses. See Inferno Distance Issues for more details.
The switch or cad has to have well implemented PLL.
|Minimum operating distance
||1/4 of nominal range.
Further manual reduction possible by change of two passive components in receiver.|
- Connects with RJ45 jack into IEEE 802.3 UTP interface. Must be plugged
directly into data terminal equipment (DTE, PC or a switch) using the integral
1m cable.Autonegotiation not supported, not transparent for autonegotiation
- The preamble is chopped off more than specified by IEEE 802.3 which
could cause a problem when Ronja is connected into a cascade of pure hubs.
However hubs almost don't exist today anymore so it is not a problem.
- Doesn't comply to IEEE 802.3 regarding not transmitting when link integrity
is not yet established. This violates page 303
14.2 g) - but IEEE 802.3 compliant devices must work with it. Complying to it
would make Ronja Tetrapolis more complicated
||335mA @12VDC (4.02W) from wall cube, 2W from external
heating power supply (switchable off).
|Full data load (both directions)||275mA||335mA
||infrared, 875nm wavelength, 37nm spectral width
|Divergence cone half angle
||cca. 3mrad (90mm aperture transmitter lens)|
|Operating temperature||-30...+70degC (outdoor part - optical heads, RX, TX), 0...+55degC (indoor part - Twister2)|
||up to 100% (condensing) with lens heating on (outdoor part), up to 95% with lens
heating off (and indoor electronics).|
||15.5kg (one side of a link, on a welded parallel console)|
|Required visibility||4km at maximum range. See Inferno Distance Issues for more details.
||BPSK (as on AUI aka Manchester) plus 1MHz asynchronous 50% duty
cycle square wave between packets. The transmitter appears to shine permanently and
steadily no matter if data pass or not.|
||Power, Receive Packet, Transmit Packet|
||infra-visual, retroreflector + infrared camera for transmitter and
DC voltage signal strength monitor port for receiver.|
|Fine aiming gear ratio
- Complies to Regulation 480/2000 Col. for naked eye for all distances
- Complies to Regulation 480/2000 Col. for 20x binoculars for distance 20m and more
- Doesn't comply to Regulation 480/2000 Col. for 20x binoculars and observer distance less than 20m. Therefore
the installer must effectively warn all people that could go into the beam
closer than 20m to not look into the device with binoculars or
magnifying glass. Putting this poster on the roof door is recommended:
- For further information see Detailed 72-page eye safety study (PS,
PDF, source for
gnuplot) tailored specially to
Regulation 480/2000 Col..
|Mechanical Installation Constraints||
- Possible mount places:
|Place||Is drilling necessary?
|Railing, round or rectangular||No
|Corner of wall||Yes
|Horizontal or tilted surface of masonry or masonry covered with tin, foil etc.||Yes
- Max. 1m from RJ45 connector is a grounded metal box with dimensions 180x123x62 mm.
- Cable distance between RJ45 connector and optical head mounting points is
|EMI and safety installation constraints||
- Cable may be laid directly along sources of interference (other signal
and power cables)
- Cable doesn't radiate interference
- Optical heads may be mounted even on places where lightning strike hazard