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3-1 .
I NTROD U CTIO N.
SE CTIO N III
OPER ATIO N
A
ND PR OG RAMM I N G
3-2.
Th e
M
odel 59313Α Α/D Co nve rter
i
s controlled by programming
f
rom. the associated HP In terface Bu s
Co ntroll er . This sect ion provides programming formats and examples that ca n be
u
sed with
d
ifferent controllers
to obta in
d
igital data fro m th e 59313Α. See App endix Ι for α desc rip tion
o
f the In terface Bu s system.
3-3 .
Op eration
o
f the 59313Α can be se parated into two
m
ain
d
ivisions:
(1)
P
rogramming the HP-113 Co ntroll er to se nd the 59313Α 7-bit ASCII * c h a r acters se lected from :
(α)
The CO NTRO L CHARAC TER
S
ET,
T
ab le 3-1 .
(b)
Th e UNI V ERSAL B U S CO MM A ND
S
ET,
T
ab le 3-2.
Th ese characte rs ca use the 59313 Α to perfor m in the desired man ner .
(2)
Programming the HP-113 Co ntroll er to extract and use the 59313Α
o
utpu t .
Section III - Operation
a
nd
P
rogramming
M
odel 59313Α
3-4 .
The term "to se nd" in the following di sc ussion ωί11 mea n: pr ogram the controll er to se nd
t
he required
characte r .
NOTE : Refer to each co ntroll er's own manu al or
i
ts HP-113 in terface manual for specific program ming
in st ru ct ions .
3-5.
U
si ng t h e Co ntrol C h aracter Set.
3-6 .
Be f ore the 59313Α can res pond to any control
c
haracter,
i
t mu st be
m
ade α li stener
b
y se n ding
i
t the
li sten address code in te rnall y se lected by jumpers (Figure 2-4) . Once the 59313Α
i
s addresse d, any of the co ntrol
c
h aracte rs (boxed , ρ ) can be sent and the 59313Α wil l res pond to them. When
t
he
l
ast co ntrol
c
haracte r has
been sent, the 59313 Α's
l
istene
r
state
s
hould be terminated by one of the foll ow in g :
(1)
Se n di ng th e U NLISTEN CO MMAND (see
T
ab le 3-2) .
(2)
Se nding the 59313Α's
T
ALK
A
DDRESS (Parag raph 2-22).
3-7.
CONTROL TIMING . Eac h co ntrol
c
haracter's funct ion begins the moment
i
t
i
s rece ived at the 59313Α,
i .e .,
n ot more than 4
m
ic roseconds afte r the co ntroller sets the DAV (data
v
ali d) line
L
O for that character. An
exce ption to thi s is discussed under switching channe ls,
P
arag raph 3-8.
3-8.
SWIT CH ING CHA NNEL S. Α p a r t i c ul a r
c
hannel is se lected for co nvers ion when its chann el se lect
characte r is se nt. One c h a nn el sel ect c h a r acter s h oul d always be in e ffect if use ful co nve rsions are to be
m
ade . 100
μs settling time should be all owed betwee n
t
he time the c h a nn e l se lect c h aracte r
i
s se nt and the
n
ext convers ion
is started. Chann el sw itching ca n be done betwee n co nversions but if α
c
h an nel se lect c h aracter
i
s se nt whil e t h e
co nverter
i
s in
t
hat portion
o
f its cycle where the inpu t signal is
n
eeded, then
t
he HP-113
h
andshake will be
i
nhi bited. This means the co ntroll e r must wa it the re un til the 59313Α
i
s finished with
t
he old inpu t before the
character se lectin g the
n
ew input will be acce pted . This timing
i
s shown grap h ically in Figure 3-1, and characters
are
i
de ntified in Tab le 3-3 .
NOTE : DO NOT use the character 3 to se lect C h annel 3 ; use
4
instead, and
8
for Channel 4 .
*American Standard Code
f
or
I
nfor m ation In terch ange, see App endix
I
V.
3-1
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