The CONV-RS485-OPT-RTM (*) is a VME rear transition module providing fiber-optic and electrical inputs and outputs. In combination with the CONV-TTL-RS485 as front-module it provides TTL to optical conversion. The interface with the CONV-TTL-RS485 is through internal RS485 signaling.

The board provides three channels. On the optical side, each channel consists of one input (IN) and two outputs (O1 and O2). Within each channel, the two outputs are driven by the same signal source, using two separate optical transmitters.

The design is based on the following existing modules:

optical transmitter	CTDAB
optical receiver	CTDPR

(*) Note on project name: After discussion, this was the name selected for the board. It does not comply with other RTM names fron the conv-ttl-xxx family such as the conv-ttl-rtm-blo, conv-ttl-rtm-rs485, conv-ttl-rtm-rs485-db9. Since no TTL signals are involved in this board, the TTL is removed. Furthermore, this board is described first by it’s signal interface (RS485 to Toptical), then by the RTM description, in the same way as the conv-ttl-rtm motherboard (without piggyback)

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Contact

Dimitris Lampridis

Licences

• CERN Open Hardware Licence v1.2

Tags

VME TRL9