NEC manual 111

6. Installation and Connections

Throw Distance and Screen Size

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.

Distance Chart

						C							B =		Vertical distance between lens center and
															screen center
													C =		Throw distance
													D =		Vertical distance between lens center and
							Screen center								screen bottom (top of screen for ceiling ap-
													α =		plication)
							Lens center					B			Throw angle
				α
												D		NOTE: The values in the tables are design values and
									Screen bottom				may vary.
[M350X/M300X/M260X/M230X]
			Screen Size				B							C					D			α
	Diagonal		Width		Height					wide						tele					wide		tele
	inch	mm	inch	mm	inch	mm	inch	mm	inch			mm	-		inch		mm	inch		mm	degree	-	degree
	25	635	20	508	15	381	5	131	26		649		-		44		1107	-2		-60	11.4	-	6.7
	30	762	24	610	18	457	6	157	31		788		-		53		1337	-3		-71	11.3	-	6.7
	40	1016	32	813	24	610	8	210	42		1066		-		71		1798	-4		-95	11.1	-	6.6
	60	1524	48	1219	36	914	12	314	64		1622		-		107		2720	-6		-143	11.0	-	6.6
	72	1829	58	1463	43	1097	15	377	77		1956		-		129		3273	-7		-171	10.9	-	6.6
	80	2032	64	1626	48	1219	17	419	86		2178		-		143		3642	-8		-191	10.9	-	6.6
	84	2134	67	1707	50	1280	17	440	90		2289		-		151		3827	-8		-200	10.9	-	6.6
	90	2286	72	1829	54	1372	19	471	97		2456		-		162		4103	-8		-214	10.9	-	6.6
	100	2540	80	2032	60	1524	21	524	108		2734		-		180		4564	-9		-238	10.8	-	6.5
	120	3048	96	2438	72	1829	25	629	130		3290		-		216		5486	-11		-286	10.8	-	6.5
	150	3810	120	3048	90	2286	31	786	162		4124		-		270		6869	-14		-357	10.8	-	6.5
	180	4572	144	3658	108	2743	37	943	195		4958		-		325		8252	-17		-429	10.8	-	6.5
	200	5080	160	4064	120	3048	41	1048	217		5514		-		361		9174	-19		-476	10.8	-	6.5
	210	5334	168	4267	126	3200	43	1100	228		5792		-		379		9635	-20		-500	10.8	-	6.5
	240	6096	192	4877	144	3658	50	1257	261		6626		-		434		11018	-23		-572	10.7	-	6.5
	270	6858	216	5486	162	4115	56	1414	294		7460		-		488		12401	-25		-643	10.7	-	6.5
	300	7620	240	6096	180	4572	62	1572	327		8294		-		543		13784	-28		-714	10.7	-	6.5
[M420X/M420XV]
			Screen Size				B							C					D			α
	Diagonal		Width		Height					wide						tele					wide		tele
	inch	mm	inch	mm	inch	mm	inch	mm	inch			mm	-		inch		mm	inch		mm	degree	-	degree
	25	635	20	508	15	381	5	131	25		636		-		43		1094	-2		-60	11.6	-	6.8
	30	762	24	610	18	457	6	157	31		775		-		52		1324	-3		-71	11.5	-	6.8
	40	1016	32	813	24	610	8	210	41		1053		-		70		1785	-4		-95	11.3	-	6.7
	60	1524	48	1219	36	914	12	314	63		1609		-		107		2707	-6		-143	11.1	-	6.6
	72	1829	58	1463	43	1097	15	377	76		1943		-		128		3261	-7		-171	11.0	-	6.6
	80	2032	64	1626	48	1219	17	419	85		2165		-		143		3629	-8		-191	11.0	-	6.6
	84	2134	67	1707	50	1280	17	440	90		2277		-		150		3814	-8		-200	10.9	-	6.6
	90	2286	72	1829	54	1372	19	471	96		2443		-		161		4090	-8		-214	10.9	-	6.6
	100	2540	80	2032	60	1524	21	524	107		2721		-		179		4551	-9		-238	10.9	-	6.6
	120	3048	96	2438	72	1829	25	629	129		3277		-		215		5473	-11		-286	10.9	-	6.6
	150	3810	120	3048	90	2286	31	786	162		4111		-		270		6856	-14		-357	10.8	-	6.5
	180	4572	144	3658	108	2743	37	943	195		4945		-		324		8239	-17		-429	10.8	-	6.5
	200	5080	160	4064	120	3048	41	1048	217		5501		-		361		9161	-19		-476	10.8	-	6.5
	210	5334	168	4267	126	3200	43	1100	228		5779		-		379		9622	-20		-500	10.8	-	6.5
	240	6096	192	4877	144	3658	50	1257	260		6613		-		433		11005	-23		-572	10.8	-	6.5
	270	6858	216	5486	162	4115	56	1414	293		7447		-		488		12388	-25		-643	10.8	-	6.5
	300	7620	240	6096	180	4572	62	1572	326		8281		-		542		13771	-28		-714	10.7	-	6.5

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