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Model
5315A/
B
O peratio
n
3-1.
INTRODUCTION
SECTION III
OPERATION
3-2.
This section
provides operat ing information
for
the 5315A/B
Un iversa
l
Counter. Descrip-
tions of all front
pa nel
con tro ls,
connedors,
and
ind
icators as
well
as
an
operator's
check,
oper-
at
ing
instruct
ions,
and
operator's
ma inte
na
nce
are
provided.
3-3. OPERATING CHARACTERISTICS
3-4. The 5315A/B
is
a
100
M
Hz/100
ns
ful
l
un iversa
l
cou nter,
capable of
Freq
uency,
Period,
Time
Interva
l,
Ratio,
and Tota
lize type measu reme nts. To
maxim
ize
resolution, the
5315A/
8
uses a
reciprocal
counting
techn ique
for frequencies below
10
M Hz,
automatica
lly
switchin
g
to con-
ve
ntional
frequency
cou
nting
for
f
requenci
es above
10
M Hz.
The
gate t
ime is
continuous
ly
ad
ju
sta
bl
e
from 50
ms
to
10 s, via
the
f ront
panel.
The
interna
l microcomputer
performs the
calcu
-
lations,
and
automatically
compensates
for
the arbitrary
gate
time.
The
display
is
given
in
engi-
neering notation
(Le., expo nents of blank 0,
±
3,
± 6,
or
±9).
The
in
put
ampli
fiers are optimized
for
both
time interva
l
and
freq
uency
measu rements. The
following paragraphs
describe
the
power-up
characteristics
and operat ing
modes
of
the 5315A/B.
3-5.
POWER-UP SELF CHECK
3-6.
When
the
5315A/B
is
turned
on,
a
power-up
reset and
self-check cycle
is
automaticall
y
initiated. This is
approximately a
2-seco
nd
cycle,
ind
icated
by
the fo
llowing
displa
y:
OV
FL
Hz
5
GATE
3-7.
During
th is
cycle,
the microcomputer
performs
a
check
su
m
of
t he
internal
program
in
ROM and a
bit
pattern
is w
ritten
into
and read
f
rom
RAM. Additio
nall
y,
a partial check
of
the
M RC
and
1/
0 ports
is
p erformed
. A ny
failu
re
during
th
e
cycle
w
ill produ
ce a
numbered
error
message,
momentarily
d
is played,
and
w
ill
latch
t he
ERROR
annun
icator ON
.
Refer
to
Error
M essages,
paragraph
3-52.
3-8.
MODES OF OPERATION
3-9.
The
5315A/B
provides
eight
modes
of operation and two
check fu
nctions.
The
resolution
and accuracy for
each
mode is provided in Table
1-1
. The
modes of operation are described
in
the followi
ng
pa ragraphs as
foll
ows:
A.
FREQ
A
B.
PER
A
C.
T.
I.
A-
B
D.
T.I.
AVG. A-B
E.
T.I.
DELAY
(Holdoff)
F.
RATI
O
AlB
G.
H.
I.
J.
A
BY
B (Gated
Totalize
)
TOT
(Man
ual Totalize
)
CHECK
Disp lay
Check
3-1
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