Digital Optical 16Tx 3Rx 2vXX#
![../../../../_images/optical_16tx_v2_complete.jpg](../../../../_images/optical_16tx_v2_complete.jpg)
Functionality#
Transmits up to 16 optical signals, e.g. gate signals.
Receives up to 3 optical signals, e.g. error signals.
The signals are passed through the CPLD first. Here additional functionality can be implemented, e.g. checking for invalid switching combinations or introducing a dead time.
Before first use#
Solder in up to
16 optical transmitters: Broadcom HFBR-1521Z
3 optical receiver: Broadcom HFBR-2521Z
Please refer to this page for detailed Soldering instructions of the receivers and transmitters.
![../../../../_images/optical_16tx_v2_transmitter.jpg](../../../../_images/optical_16tx_v2_transmitter.jpg)
Solder resistors (R14, R19) on the bottom side to connect optical receivers
Program CPLDs with firmware, see Programming the CPLD for details
Known issues#
Warning
When turning off the UltraZohm, the optical transmitters turn on shortly, solder in the pull down resistors to avoid this.
Solder pull down resistors, 2kOhm to each gate signal
![../../../../_images/optical_16tx_v2_pulldown.jpg](../../../../_images/optical_16tx_v2_pulldown.jpg)
![../../../../_images/optical_16tx_v2_pulldown_schematic.jpg](../../../../_images/optical_16tx_v2_pulldown_schematic.jpg)
Compatibility#
Slots D1 to D4 can be used without limitations
Optical Cables#
Optical Cables of type HFBR-RNSxxxZ are tested and recommended for transmitting the optical signals. The xxx determines the length of the cable in meters.
See also#
Designed by#
Thomas Kreppel (TUM), Eyke Liegmann (TUM) in 09/2019