High Rates Test Procedure

1. Make sure AMC13 and uHTR are installed properly in the crate and that the optical fiber from TTT is connected to AMC13 properly (top fiber to bottom and vice versa)
2. Prepare uHTR and enable DAQlinks and local triggers. Using uHTRTool, follow recipe here.
3. Prepare AMC13 for data taking and enable link to desired uHTRs. You can use the AMC13Tool for this (additional information here):
   • NOTE: For now (July 16, 2013), only enable link to uHTR SN 4 (which is likely in the AMC10 slot), there seems to be a bug in SN 7 which is causing the system not to write events to the monitor buffer.
   • NOTE: examples will assume the use of a single uHTR in slot AMC10 (link 9). (Remember the physical crate counts from 1 while the links count from 0.)

   • Pick an action (h for menu): i 9 b d
     Enabling AMC inputs from list: 9
     Link status: 02000200
     Enable DAQ Link
     Stop EvB when Mon Buf Full
     'CONTROL1': 008bc003
        

   • Status should show that Input link 09 is both enabled and locked:

     Pick an action (h for menu): st
     
     *****AMC13 Status*****
     Status display detail level: 1
     Control 0: 28000028
       Monitor Buffer Empty
       TTC Not Ready
     Control 1: 008bc003
       Save DAQ data to MonBuf
       MonBuff full stops EVB
       DAQ Link Enabled
       Run Mode
     AMC Link Status: 02000200
       AMC13 Enabled Inputs: 09
       AMC Input links locked: 09
     AMC Port Status: 0fff0000
       --All AMC Link Versions Correct--
       Unsynced AMC Ports: 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11
     AMC Bc0 Status: 00000018
       --No BC0s locked--
     EVB Counters:  (All 32-bit counters read 0x0)
     etc...
     

   • NOTE: Typically the BC0s for 09 (or which ever enabled links have a uHTR) should be locked, indicating that the Bc0s are be received and send trough the backplane. However, currently (July 16, 2013) there is a bug in the uHTR firmware and this does not happen.
4. Set high prescaling (~10,000.):
   • This can be done in one of two ways:
     • Using the Mega Monitor prescaling (reg T1 0x2, bits 23,22-19) (which checks for events that end in a given number of 0's in binary min 5 - max 20) or
     • Using the scale factor bits (reg T1 0x2, bits 15-0) (see last version Wu's specs for register information)
   • With Mega Monitor Prescaling (don't forget to enable Mega Monitoring):
     • insert example
   • With Scale Factor Bits:
     • insert example

-- DavidZou - 12 Jul 2013