Initialization of the VME electronics (up to April 2010)

(latest version)

The initialization of the VME modules is controlled via the files "setup_vme_0.ini" and "setup_vme_1.ini" for the Plastic Scintillator Setup and the BaF₂-Array, respectively. Each line of these files has to have the following structure: "variable = value". Each line starting with "// =" is interpreted as a comment line. Values can be set decimal or hexadecimal (0x...).

The following variables are accepted:

setup_vme_0.ini:

Variable	Meaning	Value Range	Recom- mended
comment	defines which comments should be printed out to the mbsprint_vme_0.l log-file	0: no comments 1: all comments 2: scaler values, errors, initialization	2
testrun	defines if the actual setup_vme_0.ini will be copied for logging into the directory "mbsrun/nng/log/"	0: setup will be saved 1: setup will not be saved	0
scalerrestart	defines if a check should be enabled at each scaler readout (trigger type 2) if the electronics setup is paralyzed, i.e. if the QDC buffers are full although TDC almost full level not reached	0: disabled 1: enabled	1
opcreadout	defines if MBS should readout the OPC data from the shared memory; if this value is set to 1, opc2shm should run on rio3	0: disabled 1: enabled	0
bma_readout	defines if TDC is readout in block transfer mode	0: disabled 1: enabled	1
daqmode	defines if some settings are set automaticaly to measure only plastic or only baf2 data or both (see below)	0: user adjusted 1:only plastic data 2: only baf2 data	0
sendpldata	defines if plastic data is send to data stream	0: disabled 1: enabled	1
sendbafdata	defines if baf2 data is send to data stream	0: disabled 1: enabled	1
setped	defines if the SetPed routine is started to set the TAPS QDC pedestal values automatically to 100  (some other variables are automatically change by setting 1, see below)	0: disabled 1: enabled	0
fastanalysis	defines if a fast analysis of the plastics time-of-flight spectra is written to "mbs_ratios.l"	0: disabled 1: enabled	1
sis3820_LNEtime	time between each scaler readout in seconds	1...420	15
v556_thrl	ADC threshold (if ADC in use)		0x1
v1190a_out_prog	TDC POUT output	0: Data Ready 2: Almost Full	2
v1190a_alm_full	TDC Almost Full level; it should be set to a value where the QDCs do not store more than 32 events	1... 32735	(70)
v1190a_acqmode	TDC acquisition mode	0x0000: trigger matching 0x0100: continuous storage	0x0000
v1190a_winwidth	TDC match window width in ns	25...102375	1500
v1190a_winoff	TDC match window offset before trigger in ns	-1000...51200	800
v1190a_extrasearch	TDC extra search margin		0x00
v1190a_reject	TDC reject margin		0x01
v1190a_edgedet	TDC edge detection mode	0: pair 1: trailing 2: leading 3: leading + trailing	0x02
v1190a_leadres	TDC resolution for leading edge		100
v1190a_widthres	TDC resolution for width		100
v1190a_ctrl	TDC control register	cf. manual p. 71	0x120
v1190a_headtrail	define if TDC header and trailer are enabled	0x3000: enabled 0x3100 disabled	0x3100
v486_mux	Gate Gen. MUX output; defines which output channel is also available on the MUX output	0...7	0
v486_gates	Gate Gen. gate length	0...255	250
v486_delays	Gate Gen. delay	0...255	0
v486_mode	Gate Gen. channel mode (cf. manual p. 13)	0: normal mode 1: common mode 2: coupled mode	2
v874b_mindead	all BaF-Modules: defines if the modules are set offline while readout	0: readout offline 1: readout online	1
v874b_emptyprog	all BaF-Module: defines if empty events are enabled	0: disabled 1: enabled	1
v874b_bitpat	all BaF-Modules: defines if the bit patterns are measured	0: disabled 1: enabled	0
v874b_TACon	all BaF-Modules: defines if the TAC values are measured	0: disabled 1: enabled	0
v874b_LGon	all BaF-Modules: defines if the LG and LGS values are measured	0: disabled 1: enabled	0
v874b_SGon	all BaF-Modules: defines if the SG and SGS values are measured	0: disabled 1: enabled	1
v874b_lowthr	all BaF-Modules: underflow and over range suppression	0: disabled 1: enabled	0
v874b_bafthr	all BaF-Modules: underflow threshold	0...255	0
v874b_bafsendthr	defines an additional software threshold; all BaF ADC Data words with measured values below v874b_bafsendthr will not be written to stream		0
v874b_Vset	all BaF-Modules Vset: defines time resolution / range	0: 178 ps/ch (727 ns range) 43: 103 ps/ch (400 ns range) 140: 54 ps/ch (200 ns range)	140
v874b_Voff	all BaF-Modules Voff: defines time offset	240: 300 ns 165: 400 ns 131: 500 ns	165
v874b_thrLED	all BaF-Modules threshold of the leading edge discriminators	7819: 50 mV 7446: 100 mV 6701: 200 mV	8191
v874b_#_pedXY	BaF-Module no. # pedestal value for XY; # = {1...3}, X ={SLG, SGS, LG, SG}, Y= {1, 2, 3, 4}		5376
v874b_#_thrCFDY	BaF-Module no. # threshold value of CFDY; # = {1...3}, Y= {1, 2, 3, 4}		see below

setup_vme_1.ini:

Variable	Meaning	Value Range	Recom- mended
testrun	defines if the actual setup_vme_1.ini will be copied for logging into the directory "mbsrun/nng/log/"	0: setup will be saved 1: setup will not be saved	0
comment	defines which comments should be printed out to the mbsprint_vme_1.l log-file	0: no comments 1: all comments 2: scaler values, errors, initialization	2
scalerrestart	defines if a check should be enabled at each scaler readout (trigger type 2) if the electronics setup is paralyzed, i.e. if the QDC buffers are full although TDC almost full level not reached	0: disabled 1: enabled	1
opcreadout	defines if MBS should readout the OPC data from the shared memory; if this value is set to 1, opc2shm should run on rio6	0: disabled 1: enabled	0
daqmode	defines if some settings are set automatically to measure only plastic or only baf2 data or both (see below)	0: user adjusted 1:only plastic data 2: only baf2 data	0
sendbafdata	defines if baf2 data is send to data stream	0: disabled 1: enabled	1
setped	defines if the SetPed routine is started to set the QDC pedestal values automatically to 100 (some other variables are automatically change by setting 1, see below)	0: disabled 1: enabled	0
changetargetauto	defines if scattering target is changed automatically to next position at "start acquisition"	0: disabled 1: enabled	1
settarget	defines target position if "changetargetauto" is set to 0	1...4	1
sis3820_LNEtime	time between each scaler readout in seconds	1...420	15
v1495_reload	defines if the V1495 user FPGA firmware should reloaded before initialization	0: disabled 1: enabled	0
v1495_maj	majority level	1...63	1
v1495_trig_wdth	trigger width in ns (should be multiples of 25 ns)	25...1638400	3000
v1495_coin_win	length of the coincidence window for majority determination in ns (should be multiples of 25 ns)	25...1638375	3000
v1495_baf_or_scal	downscale factor for BaF2 OR	1...65535	1
v1495_baf_maj_scal	downscale factor for BaF2 Majority	1...65535	1
v1495_pl_or_scal	downscale factor for Plastic OR	1...65535	1
v1495_trig_scal	downscale factor for readout Trigger	1...65535	31
v1495_min_wdth_baf	minimum signal width of BaF2 logical signals in ns (should be multiples of 25 ns)	25...1638375	50
v1495_min_wdth_pl	minimum signal width of Plastic logical signals in ns (should be multiples of 25 ns)	25...1638375	50
v1495_a_mask_l	Port A masking, low bits: Plastic trigger input	only plastic: 0x003f only BaF2: 0x0000	0x003f
v1495_a_mask_h	Port A masking, high bits: Plastic trigger input	only plastic: 0x0000 only BaF2: 0x0000	0x0000
v1495_b_mask_l	Port B masking, low bits: BaF2 busy	only plastic: 0x0000 only BaF2: 0x07ff	0x07ff
v1495_b_mask_h	Port B masking, high bits: Plastic busy	only plastic: 0x010f only BaF2: 0x0101	0x010f
v1495_d_mask_l	Port D masking, low bits: BaF2 trigger input	only plastic: 0x0000 only BaF2: 0xffff	0xffff
v1495_d_mask_h	Port D masking, high bits: BaF2 trigger input	only plastic: 0x0000 only BaF2: 0xffff	0xffff
v1495_e_mask_l	Port E masking, low bits: BaF2 trigger input	only plastic: 0x0000 only BaF2: 0x03ff	0x03ff
v1495_e_mask_h	Port E masking, high bits: BaF2 trigger input	only plastic: 0x0000 only BaF2: 0x0000	0x0000
v1495_f_mask_l	Port F masking, low bits: trigger output	only plastic: 0xfccf only BaF2: 0xfdf1	0xfdff
v1495_f_mask_h	Port F masking, high bits: monitor pins	only plastic: 0xffdf only BaF2: 0xffdf	0xffdf
v486_mux	Gate Gen. MUX output; defines which output channel is also available on the MUX output	0...7	0
v486_gates	Gate Gen. gate length	0...255	250
v486_delays	Gate Gen. delay	0...255	200
v874b_mindead	all BaF-Modules: defines if the modules are set offline while readout	0: readout offline 1: readout online	1
v874b_emptyprog	all BaF-Module: defines if empty events are enabled	0: disabled 1: enabled	1
v874b_bitpat	all BaF-Modules: defines if the bit patterns are measured	0: disabled 1: enabled	0
v874b_TACon	all BaF-Modules: defines if the TAC values are measured	0: disabled 1: enabled	0
v874b_lowthr	all BaF-Modules: underflow and over range suppression	0: disabled 1: enabled	0
v874b_bafthr	all BaF-Modules: underflow threshold	0...255	10
v874b_bafsendthr	defines an additional software threshold; all BaF ADC Data words with measured values below v874b_bafsendthr will not be written to stream		0
v874b_Vset	all BaF-Modules Vset: defines time resolution / range	0: 178 ps/ch (727 ns range) 43: 103 ps/ch (400 ns range) 140: 54 ps/ch (200 ns range)	140
v874b_Voff	all BaF-Modules Voff: defines time offset	240: 300 ns 165: 400 ns 131: 500 ns	165
v874b_thrLED	all BaF-Modules threshold of the leading edge discriminators	7819: 50 mV 7446: 100 mV 6701: 200 mV	7446
v874b_#_pedXY	BaF-Module no. # pedestal value for XY; # = {1...11}, X ={SLG, SGS, LG, SG}, Y= {1, 2, 3, 4}		5376
v874b_#_thrCFDY	BaF-Module no. # threshold value of CFDY; # = {1...11}, Y= {1, 2, 3, 4}		see below

Changes resulting from setting daqmode or setped variable:

The following settings are done when the "daqmode" or "setped" variable is not set to 0. In this case the values for these variables written in setup_vme_*.ini files are ignored. The settings for setped = 1 are superior to the settings of daqmode

	daqmode = 1 (plastic only)	daqmode = 2 (BaF2 only)	setped = 1
vme_0
sendpldata	1	0	1
sendbafdata	0	1
v486_delays			200
v874b_LGon			1
v874b_SGon			1
vme_1
sendbafdata	0	1	1
v1495_a_mask_l	0x003f	0x0000	0x8000
v1495_a_mask_h	0x0000	0x0000	0x0000
v1495_b_mask_l	0x0000	0x7fff	0x0000
v1495_b_mask_h	0x0107	0x0101	0x0000
v1495_d_mask_l	0x0000	0xffff	0x0000
v1495_d_mask_h	0x0000	0xffff	0x0000
v1495_e_mask_l	0x0000	0x03ff	0x0000
v1495_e_mask_h	0x0000	0x0000	0x0000
v1495_f_mask_l	0xfccf	0xfdf1	0xffff
v1495_f_mask_h	0xffdf	0xffdf	0xffff

The CFD thresholds should be set as follows:

BaF-Module no.	Serial no.	CFD1	CFD2	CFD3	CFD4
1	230	0x1fab	0x1fc1	0x1fb8	0x1f98
2	182	0x1fad	0x1ff8	0x1fcd	0x1fb1
3	200	0x1fc3	0x1fa3	0x1fbe	0x1fae
4 (CFD ch4 damaged)	210	0x1f9e	0x1fac	0x1fc4	0x1fc1
5	211	0x1fb9	0x1fa1	0x1fb7	0x1fbe
6	212	0x1fc6	0x1fb3	0x1fb2	0x1ff1
7 (CFD ch3 damaged)	232	0x1fb6	0x1fc0	0x1fb8	0x1fc8
8	225	0x1fca	0x1fad	0x1fb6	0x1fb5
9	227	0x1fbb	0x1fab	0x1fb4	0x1faf
10	234	0x1fc0	0x1fd7	0x1fb5	0x1fb3
11 (CFD ch4 damaged)	229	0x1fad	0x1fb0	0x1fbf	0x1fd8
noisy	181	0x1fa4	0x1f73	0x1f85	0x1fbb
noisy	218	0x1fa0	0x1fad	0x1fad	0x1f9d
noisy	228	0x1fc5	0x1fc1	0x1f76	0x1fb1
2 channels damaged	233	0x1fcb	0x1fa5	0x1fc9	0x1fb3
12	235	0x1fd8	0x1fc0	0x1fcd	0x1f98
13	236	0x1fc5	0x1f8b	0x1f9c	0x1fbc
14	238	0x1fb5	0x1fd8	0x1fad	0x1fd6
	239	0x1fac	0x1fc3	0x1f87	0x1fbd
	241	0x1fcd	0x1fba	0x1f73	0x1f8e