ESI VideoBridge 2150, Service Manual

Page: 23 / 332

One t o s i x d i g i t s o f mea s u r e me n t i n f orma t i on c a n be d i sp l a y e d on t h e
C R T . T h e n u m b e r o f d i g i t s d i s p l a y e d i s r e l a t e d t o t h e r e s o l u t i o n
con t a i n e d i n t h e A/D convers i on p r o c e s s . M o r e c ommon l y , t h e n u m b e r o f
d i g i t s d i sp l a y e d depe n d s upon se l e c ta b l e f a c t o r s s u c h a s m e a s u re me n t
spe e d ,
t e s t f r e q u e n c y , a n d i mpeda n c e r a n g e . O f t he s e , m e a s u reme n t
spee d h a s t he g re a t e s t e f f e c t on n u mber o f d i g i t s d i sp l a ye d :
d i g i ts requ i re m o r e t i me .
more
A s p e c i a l t e s t mode ( 27 CODE
)
a l l ow s d i sp l a y of more d i g i t s at f a s te r
spe e d s i f d e s i r e d . H oweve r , t h e s e e xp a n d e d rea d i ng s may n o t i mprove
true m e a s u r e me n t r e s o l u t i on d u e t o a c t ua l s i g n a l - t o-no i s e ra t i os .
The M od e l 2 1 5 0 / 2 160 o f fe r s ma x i mu m f l e x i b i l i ty w i t h a w i de r a n g e o f
op t i on s . M a n y op t i on s a re f i e l d i n s ta l l a b l e a n d a re d e s i g n e d t o t a i l or
i n s t r u me n t ope ra t i on t o spe c i f i c t e s t i ng r eq u i reme n t s . T hey ope ra t e a s
s ta n d- a l on e be n c h top t e s t e r s o r c a n b e u se d w i t h a u x i l i a ry h a nd l i ng
equ i pmen t t o f i t e a s i l y i n t o s op h i s t i ca t e d a u toma t i c t e s t i n g s y s t e m s .
NOTE :
T h e RS- 2 3 2 C I n te r f a ce capa b i l i t y c ome s s ta n d a r d on
the Mode l 2 160 V i de o B r i d g e and i s l oc a t e d on the same b oa rd
as t h e c a s s e t te c o n t r o l c i r c u i t ry . S i n c e the M ode l 2 1 5 0
V i de o B r i d g e h a s n o c a s s e t t e con t r o l c i r c u i t , t h e R S- 2 3 2 C
I n te r f a c e i s a v a i l a b l e a s a f i e l d i n s ta l l a b l e op t i on k i t ,
P iN 4672 4 .
R S - 2 3 2 C I n t e r f a c e c i r cu i t ope r a t i on i s t h e s a me f or e a c h
m o de l , h ow e v e r a n d i s de s c r i be d i n S e c t i on A . 2 .
1 - 5
e l s l i 2 1 50 / 2 160 5 /8 5