Difference: AMC13UserManual (39 vs. 40)

Revision 4023 May 2018 - EricHazen

Line: 1 to 1

META TOPICPARENT	name="HcalDTC"

THIS MANUAL IS INCOMPLETE but what is written here should be more accurate and up to date than the old "functional specification". Please e-mail me if you find mistakes/omissions here (Eric H).

Line: 475 to 475

Clock Source <-- -->	Trigger Source	Hardware	T1 0x1 bit 15	T1 0x1 bit 8	T1 0x1 bit 2
Fiber	Internal	Fiber with TTC input	0	0	1
Internal	Internal	Loop-back fiber (Note 1)	0	1	1

Changed:

<
<

Lemo

Internal

Special T3 with clock input

>
>

Lemo

Special T3 with clock input

Not used

Notes:

SFP transceiver with loop-back fiber from Tx to Rx must be installed in bottom site

Added:

>
>

The control bits above can be accessed in the AMC13 software using the following names:

Name	Function	Address/bit
CONF.TTC.ENABLE_INTERNAL_L1A	Use internally-generated L1A	0x1 / 2
CONF.DIAG.FAKE_TTC_ENABLE	Enable TTC loop-back output signal	0x1 / 8
CONF.TTC.T3_TRIG	Accept triggers from T3 input	0x1 / 15

When CONF.TTC.T3_TRIG is set, CONF.TTC.ENABLE_INTERNAL_L1A must also be set.

To use these features, enable the AMC13 as usual using the 'en' command in AMC13Tool2 (or C++ class equivalent), then set the desired bits to '1' using AMC13Tool2 commands, e.g.

  > en 1-6 t
  > wv CONF.TTC.ENABLE_INTERNAL_L1A 1
  > wv CONF.TTC.T3_TRIG 1

HCAL Orbit Gap Calibration

The AMC13 implements several features to facilitate triggers for calibration purposes during the LHC "Orbit Gap" during which no normal L1A should occur. The details of this have to a certain extent been lost in time.

View topic | History: r43 < r42 < r41 < r40 | More topic actions...