1. ZEBRA Tom Cobb presented by Nick Rees

2. What is a zebra? Zebras (/ˈzɛbrə/ ZEB-rə or /ˈziːbrə/ ZEE-brə)[1] are several species of African equids (horse family) united by their distinctive black and white stripes./ˈzɛbrə/ZEB-rə/ˈziːbrə/ZEE-brə[1]

3. What is ZEBRA? A digital signal level converter and position compare box 1U metal box with front panel BNCs and Lemos and rear panel encoder inputs

4. What does ZEBRA do? Takes front panel single channel inputs – TTL, LVDS, PECL, NIM, Open Collector And rear panel encoder signals – A+B RS422 Quadrature decoder, Z, connected Pass the signals through some FPGA logic – Logic gates, position compare circuitry Ouput front and rear panel signals – Same format as inputs, rewirable at run time

6. FPGA Design Communications (8-bit soft Micro Controller) Logic Control Position Compare SRAM Ctrl UART Ctrl Spartan-6 FPGA RS232 16 Mbit SPI Flash 2MBx8 SRAM 12 x LVTTL Inputs 12 x LVTTL outputs 4 Ch x RS422 outputs 4 Ch x RS422 Inputs 256x16 Config BRAM ctrl arm/gate/ pulse ctrl rs422 signals

7. How do you configure ZEBRA? 115200 baud RS232 link to EPICS Parameters set/get via EPICS Logic blocks rewired via the system bus Data download of position/time information Save to internal flash

8. The System Bus

9. AND/OR Blocks

10. GATE Blocks

11. DIV Blocks

12. PULSE Blocks

13. QUAD Block and Encoders

14. PC Setup

15. PC Plot

16. What doesn’t ZEBRA do? Analogue Signals < 20ns Low latency data transfer High bandwidth data transfer Sequencing

17. When can I have one? Available from Quantum Detectors http://www.quantumdetectors.com/prod ucts/zebra http://www.quantumdetectors.com/prod ucts/zebra Should be in stock by Christmas

18. Ideas for Zebra2 Ethernet interface TCP not UDP, so... Zinq, rather than Spartan6 IOC on board(?) Additional encoder capture/trigger signals: Analogue input Serial encoder input Event reciever (?) Better support for counters Differences? More gates