Ronja Twibright Labs

Ronja 10M Metropolis Specification

Gross data rate 10 Mbps
Transmission mode Full duplex only
Nominal range 1.4km with HPWT-BD00-F4000 and 130mm lenses. See Range 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.
Data interface IEEE 802.3 Attachment Unit Interface (AUI). Connector male DB-15 with screws instead of AUI mechanical latch. AUI cable not supported - integrated cable length 1m. 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.
Power consumption 300mA @12VDC (3.6W) from AUI, 2W from external heating power supply (switchable off)
Operating wavelength visible, 625nm, 100nm spectral width (618nm perceived wavelength, red-orange)
Optical output 17.2mW
Divergence cone half angle 1.9mrad (130mm aperture transmitter lens)
Estimated Optical EIRP 20kW (130mm aperture transmitter lens, HPWT-BD00-F4000)
Operating temperature -30…+70°C (outdoor part - optical heads, RX, TX), 0…+55°C (indoor part - AUI interface)
Operating humidity up to 100% (condensing) with lens heating on, up to 95% with lens heating off.
Weight 15.5kg (one side of a link, on a welded parallel console)
Required visibility 4km for uninterrupted operation at full range. See Distance Issues for more information.
Optical modulation BPSK (as on AUI) 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.
Indicators LEDs Power, Receive Packet, Transmit Packet
Aiming system visual, retroreflector for transmitter and DC voltage signal strength monitor port for receiver.
Fine aiming gear ratio 1:300
Eye Safety Complies with Czech State regulation: 480/2000 Col. Government Direction about Health Protection from Non-ionizing Radiation
Mechanical Installation Constraints
  • Possible mount places:
    PlaceIs drilling necessary?
    Railing, round or rectangularNo
    Corner of wallYes
    Horizontal or tilted surface of masonry or masonry covered with tin, foil etc.Yes
  • Max. 1m from AUI connector is a grounded metal box with dimensions 160x140x52 mm.
  • Cable distance between AUI connector and optical head mounting points is max. 100m
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 exists.
An expected information missing here?