 Time protocols used for SADC [message #404] |
Sat, 01 May 2004 21:01  |
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In the thread How to interface SADC to Time distribution is described by Lars and Igor how the SADC is conceptually connected to the time distribution.
I wonder whether there is somewhere a more detailed documentation which describes:
- how the TTC is used with the SADC in self-triggered operation
- what time representation is distributed in this case by the TTC
- what the hit and time stamp format is in the SADC data stream
W.F.J.Müller, GSI, CBM, Tel: 2766
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| Re: Time protocols used for SADC [message #408 is a reply to message #404] |
Sun, 02 May 2004 19:21  |
Igor Konorov
Messages: 7
Registered: April 2004
Location: TU Muenchen
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occasional visitor |
From: *e18.physik.tu-muenchen.de
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There is a diploma thesis of Alexander Mann which describes the SADC and one of a method to extract the timing information. But it might be faster if I answer:
1. in the triggered mode the time of the signal is referenced to the trigger time and in self triggered mode it is referenced to a time ZERO. The time ZERO is defined by the TCS when it broadcasts the RESET signal. The trigger and the RESET signals are synchronous to the TCS clock.
Each frontend module including SADC counts the TCS clock. The counter is reseted by the TCS RESET signal. In this case the value of the counter corrected by the propagation time of the clock through the fibre is an absolute time or a time stamp.
2. the SADC detects the signal, calculates the amplitude and the time. The time is given by the clock counter(time stamp) after which the signal appeared and by 5 bits which define the timing of the signal respectively to the clock phase within the clock period.
Igor Konorov
Technical University of Munich
Physic Department E18
mail: igor.konorov@ph.tum.de
tel: +49-89-28912574
Fax: +49-89-28912570
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| Re: Time protocols used for SADC [message #412 is a reply to message #408] |
Mon, 03 May 2004 19:04 |
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| Igor Konorov wrote on Sun, 02 May 2004 19:21 |
There is a diploma thesis of Alexander Mann ....
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Thanks. Is this diploma thesis somewhere on the web ?
And to understand it more quantitatively:
- How often is the RESET signal send by the TCS
- How many bits does the clock counter have, and are all these bits transmitted in each time stamp for each hit.
W.F.J.Müller, GSI, CBM, Tel: 2766
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