	<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
143	69	532637	14	75	588593	13	76	561499	13	06-FEB-07		Sens=7.5mV/fc Th=15fc

Thr_Max in register units for M3R4-143

Thr_Max in register units for M3R4-143

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	59	79	67	73	65	77	56	80	64	78	62	72	62	71	57	75
FEB-2	72	76	75	78	79	76	77	69	77	75	69	69	76	78	75	72
FEB-3	74	77	79	68	82	71	79	78	76	74	72	83	80	74	75	78

Noise rate at Thr_Max [counts/sec] for M3R4-143

Noise rate at Thr_Max [counts/sec] for M3R4-143

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	472772	483302	458768	547416	655738	906480	411975	474864	284402	439670	547326	468057	600050	491028	626142	654201
FEB-2	448461	696581	458486	592567	570373	513480	440534	468351	411250	688349	570119	537165	659269	822449	758315	781744
FEB-3	544117	723558	537422	714412	477307	632809	376927	355712	752605	583858	514386	373973	464265	585326	682448	664852