Differences

This shows you the differences between two versions of the page.

--- event_filter [2015/10/30 17:33]
pereira [CRDC packets]
+++ event_filter [2015/10/31 11:37]
pereira [CRDC packets]
@@ Line 3: / Line 3: @@
 The trigger bits words indicates which bits were set during the event. The encoding of the bits is the following:
-In this section, the following diagram will be used to describe a 16-bit word sent by the Filter. The first row includes the value, either in decimal or hexadecimal format, or a descriptive note. The second row shows the value in binary ("X"s are used to describe arbitrary values that vary from event to event). The last row shows the bit number.
+In this section, each 16-bit word sent by the Filter is described by a 16x3-table diagram. The first row includes the value, either in decimal or hexadecimal format, or a descriptive note. The second row shows the value in binary ("X"s are used to describe arbitrary values that vary from event to event). The last row shows the bit number.
@@ Line 268: / Line 268: @@
   * **Sub-packet "Energy" Length** (self-inclusive)
-^    from 2 to 16    ^^^^^^^^^^^^^^^|
+^   A number from 2 to 16    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 278: / Line 278: @@
 The energy (from the Phillips 7164H ADC module) is given by a series of words that look like:
-^  ^^^ Ch ^ energy  ^^^^^^^^^^^|
+^  ^^^ Ch ^   energy   ^^^^^^^^^^^|
 | 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 |
@@ Line 293: / Line 293: @@
   * **Packet Length** (self-inclusive)
-^    A number from 4 to 18    ^^^^^^^^^^^^^^|
+^    A number from 4 to 18    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 318: / Line 318: @@
   * **CRDC Sub-packet "Raw" Length** (self-inclusive)
-^    from 2 to 16    ^^^^^^^^^^^^^^^|
+^   A number from 2 to 16    ^^^^^^^^^^^^^^^|
 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | X | X | X | X | X |
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
@@ Line 332: / Line 332: @@
-  * **Dummy word**
+  * **Global threshold**
 ^    0x0000    ^^^^^^^^^^^^^^^|
@@ Line 338: / Line 338: @@
 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
-This word is reserved for a global threshold, which is no longer used.
+This word is reserved for a global threshold; it is no longer used, so it is set to 0
-  * **Samples "packets"**
+  * **Samples sub-packets**
-The Filter sends a series of samples "packets". Each "packet" consists of one 16-bit word, with information about the sample number, followed by four 16-bit words, each with energy information from a pad.
+The Filter sends a series of sample sub-packets. Each sub-packet consists of two parts. The first part includes one 16-bit word with information about the **sample** and **channel** numbers:
+^  control bit  ^   sample    ^^^^^^^^^   channel   ^^^^^|
+| 1 | 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 |
-^  Control bit  ^   sample number   ^^^^^^^^   channel number  ^^^^^^|
+where **channel** is a number between 0 and 63, and refers to a group of four pads. The second part includes __up to four__ consecutive 16-bit words, each with a pad energy __greater than 0__:
-| 0 | 0 | 0 | X | X | X | X | X | X | X | X | X | X | X | X | X |
+^  control bit  ^  empty  ^^^  connector  ^^  energy  ^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 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 |
+The **connector** number is related to the pad number (**pad**) according to: **pad** = **channel** + **connector** x 64 (where **connector** ranges from 0 to 3, and **channel** is given by the first word of the sample sub-packet). Note that the Filter processes information from connectors with energies greater than 0.
+  * **CRDC Sub-packet "Anode" Length** (self-inclusive)
+^    4    ^^^^^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **CRDC Sub-packet "Anode" Tag**
+^    0x5845    ^^^^^^^^^^^^^^^|
+| 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
+| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+  * **Energy from Anode**
+The anode energy (encoded in the [[S800 USB DAQ data format#Tag 0x7167: Phillips 7164 ADC module for CRDC anodes (energies and TAC)|S800 Phillips 7164H ADC]]) is given by:
+^  empty  ^^^^   energy   ^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 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 |
+  * **Time from Anode**
+The anode time (from an ORTEC TAC encoded in the [[S800 USB DAQ data format#Tag 0x7167: Phillips 7164 ADC module for CRDC anodes (energies and TAC)|S800 Phillips 7164H ADC]]) is given by:
+^  empty ^^^^   time   ^^^^^^^^^^^|
+| 0 | 0 | 0 | 0 | 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 |
-Where Ch is the segment number (from 0 to 15, being segment 0 the most upstream). The Filter gives an energy word for each segment as long as **energy** is greater than 0.

S800 Documentation

User Tools

Site Tools

Differences

Page Tools