FERA data FORMATS
There are several formats of FERA data used at GAMMASPHERE.
Here is a overview of some of them:
type 0: LeCroy like FERAs
=========================
header word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
1www w000 vvvv vvvv w: word count, v: VSN
data word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
0ccc cddd dddd dddd c: channel, d: 11 bit data word
type 1: Silena like FERAs
=========================
header word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
1000 wwww vvvv vvvv w: word count, v: VSN
pattern word: (always follow header word before data)
1111 11
5432 1098 7654 3210
---- ---- ---- ----
0000 0000 pppp pppp p: pattern word
data word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
0ccc dddd dddd dddd c: channel, d: 12 bit data word
o: overflow
type 2: Ortec like FERAs
========================
header word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
100w w000 vvvv vvvv w: word count, v: VSN
data word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
0ccd dddd dddd dddd c: channel, d: 13 bit data word
o: overflow
Note: this format is also used for isomer modules.
type 3: EXPORT module
=====================
header word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
1nnn nnnn vvvv vvvv n: # ADCs, v: VSN
[faulty export modules will have a ghost
word here= 0x0000. See chatscript option
'exportmod' for how to fix that problem]
then follows n entries as
hitpattern:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
pppp pppp pppp pppp p: pattern word
data word (deduce number from hitpattern):
1111 11
5432 1098 7654 3210
---- ---- ---- ----
cccc dddd dddd dddd c: channel, d: 12 bit data word
type 4,5: clock1,clock2
=======================
header word:
1111 11
5432 1098 7654 3210
---- ---- ---- ----
10nn nnn0 vvvv vvvv n: # registers, v: VSN
then follows n registers
1111 11
5432 1098 7654 3210
---- ---- ---- ----
0ccc dddd dddd dddd c: channel, d: 12 bit data word