= Introduction =

[[Timestamp]]
[[TracNav]]
[[TOC(inline)]]

== Todo ==
* Implement the strobing of the bits [ 2 : 7 ] of the TTCrq channel broadcast[[BR]] 
* Test the Fault lines[[BR]]

== Problems identified ==

* Inversion of the SDA and SCL signal between the LV010 (near RJ45 of the front face of the CROC) and the SPECS Mezzanine connector[[BR]]
* Adaptation of the SPECS Signal in the case when the SPECS Mezzanine is simply a repeater[[BR]]
* Polarisation of the 2 drivers going to the backplane for specs sda- signals. the sda- is not well polarised and the V divider on the +sda simply changes the common mode. This leads to a bad pulse when the command to the driver is released. The sda- pin has to be polarised to GND with for example a 5k resistor. Then the sda+/- signals are well polarised.[[BR]]
* Correct Delatcher oscillation problem[[BR]]
* add screws to fix properly the TTCrq board[[BR]]
* Use an isolated bar to tighten the board[[BR]]
* Use small head screws to attach the isolated bar to the PCB (bottom of the board) [[BR]]
* Front face : IN/OUT vertical line should be interrupted and Ext Event should be replaced with NICOMATIC IN/OUT[[BR]]
* Modify serigraphy on the PCB of the board (SDA_LD_IN and OUT have to replaced, via should be separated to permit to plug several probes altogether)[[BR]]
* OutTrigSeqL0 must be connected to the Trigger AFTER the selection multiplexer[[BR]]
* Do we have to implement a swith to put on/off the NIM drivers (heat problems) ? [[BR]]
* Add a pole Zero compensation on the Specs Interface [[BR]]
* Add a capa on the clock line of the Specs Bus of the CROC [[BR]]
* Modification of the TTCrq connector[[BR]]
* Do we have to add a temperature probe[[BR]]
* Regis task Force : remove Ext Event from the front face of the croc

== CROC proto 3 : Fabrication status ==

=== CROC v3 prototypes : present fabrication ===

|| CROC || Status     || Download version(date) || Comment || 
|| 1    || Quick test ||                        ||         ||
|| 2    ||     -      ||                        ||         ||

=== Final Number of CROC to be produced ===

__Number of CROC (v3)__ :

|| Crate || Croc     ||
|| ECAL  || 14 = 2x7 ||
|| HCAL  ||  4 = 2x2 ||
|| PRS   ||  8 = 2x4 ||
|| Spare ||  26      ||
|| Total ||  33      ||

* Vérifier liste des signaux TTCrq. Voir emprunt TTCvx (Atlas) au LAL
=== Output MCM on CROCv3 board ===
||  FEB   ||  FE_PGA on CROC || Chanel_MCM Optical Transmitter ||
|| FEB_0  ||
|| FEB_1  ||
|| FEB_2  ||
|| FEB_3  ||
|| FEB_4  ||


 
== Compte-Rendus ==

* [wiki:CROCproto3/cr231105 Compte-Rendu Meeting 23 Nov. 05 : CROC fabrication test]