HP 3457A Service Manual page 54

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Operation
@
FUNCTIONKEYS- The f u n c t i o n k e y s s e l e c t t h e t y p e o f measurement.
A v a i l a b l e f u n c t i o n s a r e :
DC
v o l t s (DCV),
A C v o l t s (ACV),
AC+DC v o l t s (ACDCV),
2 - W i r e Ohms (OHM),
4 - W i r e Ohms (OHMF),
DC
c u r r e n t ( D C I ) ,
A C c u r r e n t ( A C I ) , AC+DC c u r r e n t (ACDCI),
F r e q u e n c y (FREQ) a n d P e r i o d (PER).
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ANNUNCIATORS
-
The
12 a n n u n c i a t o r s a c r o s s
t h e
b o t t o m o f
t h e d i s p l a y
i n d i c a t e
t h e
p r e s e n t
o p e r a t i n g c o n d i t i o n s o f t h e i n s t r u m e n t . The p u r p o s e o f each a n n u n c i a t o r i s as f o l l o w s :
SMPL
-
The Sample a n n u n c i a t o r f l a s h e s t o i n d i c a t e d i s p l a y u p d a t e s . The maximum d i s p l a y r a t e
i s
5 u p d a t e s p e r second. The a n n u n c i a t o r does n o t i n d i c a t e measurement r a t e .
REM
-
The Remote a n n u n c i a t o r i s o n when t h e i n s t r u m e n t i s b e i n g c o n t r o l l e d f r o m t h e H P - I B .
SRQ
-
The S e r v i c e Request a n n u n c i a t o r i s o n when t h e i n s t r u m e n t i s r e q u e s t i n g s e r v i c e f r o m
t h e c o n t r o l l e r .
ADRS
-
The A d d r e s s e d a n n u n c i a t o r i s o n when t h e i n s t r u m e n t h a s b e e n a d d r e s s e d t o t a l k o r
l i s t e n o n t h e b u s .
AC+DC
-
The AC+DC a n n u n c i a t o r i s
o n when t h e DC c o u p l e d A C v o l t a g e o r c u r r e n t f u n c t i o n h a s
b e e n s e l e c t e d .
4
~
n
-
The 4 - W i r e Ohms a n n u n c i a t o r i s o n when t h e 4 - W i r e Ohms f u n c t i o n h a s b e e n s e l e c t e d .
AZOFF
-
The A u t o - Z e r o O f f a n n u n c i a t o r i s o n when t h e A u t o - Z e r o f e a t u r e h a s b e e n d i s a b l e d .
MRNG
-
The Manual Range a n n u n c i a t o r i n d i c a t e s t h e A u t o - R a n g i n g f e a t u r e h a s b e e n d i s a b l e d .
MATH
-
The Math a n n u n c i a t o r i s o n when t h e m a t h e m a t i c s f e a t u r e t h e m a t h e m a t i c s f e a t u r e h a s
b e e n s e l e c t e d .
REAR
-
The
Rear
I n p u t
a n n u n c i a t o r
i n d i c a t e s
t h a t
t h e Rear
I n p u t
T e r m i n a l s
h a v e
b e e n
s e l e c t e d .
ERR
-
The E r r o r a n n u n c i a t o r f l a s h e s when a n e r r o r c o n d i t i o n e x i s t s .
E r r o r i n f o r m a t i o n i s
s t o r e d i n t h e e r r o r r e g i s t e r s .
SHIFT
-
The S h i f t a n n u n c i a t o r i s a c t i v a t e d when t h e b l u e s h i f t k e y i s p r e s s e d .
Figure 3-3. Front Panel Features

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