	<i>Thresholds Scan<br />185 M3R4 chambers passed the tests</i></font> Thresholds Scan 185 M3R4 chambers passed the tests

Tables below present:
- Thr_Max(r.u.), Thresholds in register units at Maximum of noise rate;
- N_Max, Noise rate at Thr_Max in counts/sec;
- D_100 = Thr_100(r.u.) - Thr_Max(r.u.) where Thr_100(r.u.) is the threshold in register units at noise rate = 100/s.
The following expression relates the real threshold (measured from the base-line of physical signals) with the thresholds determined by the register units:
Thr(fC)*S(r.u./fC) = Thr(r.u.) - Thr_Max(r.u.)+ OFFSet(r.u.).
Here, OFFSet=17 register units;
S=3.40 r.u./fC is the charge sensitivity corresponding to S=8mV/fC taken for M3R4 chambers;
(Note, that 1 register unit = 2.35 mV)

	FEB-1. Mean values.			FEB-2. Mean values.			FEB-3. Mean values.
Chamber	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Thr_Max [r.u.]	N_Max [counts/s]	D_100 [r.u.]	Test Date	Plots	Comments
121	81	494377	12	72	352706	11	75	390043	12	31-JAN-07		Sens=7.5mV/fc Th=15fc

Thr_Max in register units for M3R4-121

Thr_Max in register units for M3R4-121

FEB Channels	Ch_1	Ch_2	Ch_3	Ch_4	Ch_5	Ch_6	Ch_7	Ch_8	Ch_9	Ch_10	Ch_11	Ch_12	Ch_13	Ch_14	Ch_15	Ch_16
FEB-1	81	77	78	73	86	87	83	83	80	84	81	85	76	78	76	84
FEB-2	73	72	79	67	75	68	69	67	79	67	71	67	70	75	72	75
FEB-3	79	75	80	80	68	81	65	79	71	76	77	72	77	83	72	72

Noise rate at Thr_Max [counts/sec] for M3R4-121

Noise rate at Thr_Max [counts/sec] for M3R4-121

FEB Channels	Ch_1	Ch_2	Ch_3	Ch_4	Ch_5	Ch_6	Ch_7	Ch_8	Ch_9	Ch_10	Ch_11	Ch_12	Ch_13	Ch_14	Ch_15	Ch_16
FEB-1	497488	501036	399460	436862	343049	459861	350614	721869	421750	497119	345242	475403	569090	784312	508992	597889
FEB-2	305316	502133	318854	437869	225506	423412	311406	337454	244933	278511	353393	291739	229933	367988	532340	482503
FEB-3	410125	514030	435575	355746	372496	333217	395606	326329	263562	460905	424032	273549	524241	413820	437840	299620