Differences

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--- event_filter [2015/10/31 21:44]
pereira [TPPACs packet]
+++ event_filter [2015/11/01 08:29]
pereira [Mesytec TDC (MTDC) packet]
@@ Line 621: / Line 621: @@
 ==== Mesytec TDC (MTDC) packet ====
-The MTDC packet includes the multiple timing values registered in each channel of the Mesytec MTDC for a given event.
+The MTDC packet includes the multiple timing values [[S800 USB DAQ data format#Tag 0x0DDC: Mesytec MTDC-32 module |encoded in the Mesytec MTDC]]. The packet looks like:
-all the timing values encoded in the [[S800 USB DAQ data format#Tag 0x7186: Phillips 7186 TDC module for time-of-flights|Phillips TDC]] and the XFP-FP and OBJ-FP ToF from the ORTEC TACs encoded in the [[S800 USB DAQ data format#Tag 0x7167: Phillips 7164 ADC module for CRDC anodes (energies and TAC)|S800 Phillips 7164H ADC]].
@@ Line 635: / Line 633: @@
   * **Packet Tag**
-^    0x5802    ^^^^^^^^^^^^^^^|
+^    0x58E0    ^^^^^^^^^^^^^^^|
-| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
+| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-  * **Time-of-flight values**
+  * **Time values**
-The time-of-flight information for each channel is coded in words that look like:
+Every time value encoded in the MTDC is sent by the Filter as a series of two 16-bit words: the first one provides information about the MTDC channel and the hit number; the second one gives the time value for that channel-hit. In the current version (Oct. 2015), the Filter processes up to 32 hits per channel. This value can be increased if necessary.
-^  ^^^ Ch ^  time  ^^^^^^^^^^^|
+^   ^^^^  hit  ^^^^ channel ^^^^^^^|
 | 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-Up to eight of these words can be present (depending on wheter **time** is greater than 0): six from the Phillips TDC, and two from the XFP-FP and OBJ-FP TACs. The channel number Ch is given by:
-^ Ch ^ Source  |
-| 6 | Phillips TDC time from the A1900 IM2 north scintillator (optional)  |
-| 7 | Phillips TDC time from the A1900 IM2 south scintillator (optional)  |
-| 12 | Phillips TDC time from the RF    |
-| 13 | Phillips TDC time from the OBJ scintillator  |
-| 14 | Phillips TDC time from the XFP scintillator  |
-| 15 | Phillips TDC time from the LaBr (optional)  |
-| 4 | XFP-FP time-of-flight from TAC  |
-| 5 | OBJ-FP time-of-flight from TAC  |
+^   time   ^^^^^^^^^^^^^^^|
-Note that the time values from the Phillips TDC are subtracted by SpecTcl to the time from the S800 trigger E1 up (encoded in the [[#trigger packet|trigger packet]]) in order to calculate the corresponding time-of-flight. On the other hand, the times from the TACs (Ch 4 and 5) correspond to actual time-of-flight values.
-^        ^^^^^^^^^^^^^^^|
 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-^        ^^^^^^^^^^^^^^^|
-|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
-| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-^    Bit    ^^^^^^^^^^^^^^^|
-| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |

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