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Model
5315A/8
Operation
o
o
3-12
TOT,
STOP/START. Selects Totalize
mode of
operation,
manually
controlled
by
the
Shift
key.
With
the Shift
ke
y in,
totalize of signal frequency on
INPUT
A
sta
rts.
With
t
he
Shift key
out, totalize
accumulation
stops
and
holds.
RESET
must
be
pressed to
zero the
display.
SHIfT.
Used
in
con ju nction with six
(previously
described)
dual purpose function
keys
(3,4,5,
6,7,8)
to
select
the
function labeled
above
or below the key, With the Shift out,
funct ions
labeled
above
the
keys
are
enabled, with the Shift
key
in,
fundion5 labeled
below
the keys
are
enabled,
GATE
TIME/DELAY.
For
FREQUENCY,
PER IOD,
RATIO
AND T.
1.
AVERAGE modes,
provides
continuously variable measurement time
from, nominally, 50 ms
to
10
s (mini·
mum
=
1
period of the input
signal
),
For 1.1.
mode, varies
the time between
measure-
ments, For T,1.
DELAY
mode, prov
ides
cOnlinuously variable
delay
time between
START
and
STOP enable.
HOLD. Single
measurement
with
minimum
gate time. Requires
pushing RESET key
to
initiate
new
measurement
.
AC/DC. Selects ac or dc coupling
for
corresponding
input
signal.
INPUT A, B. Input
BNC's
for
channels A
and B,
ATIN, Xl/X20. Seleds
attenuation
of signal on corresponding
input
channels,
Xl
position
connedS input
signal
directly to
input
amplifiers; X20 position attenuates input signal
by
a factor of 20 (nom
inal),
FILTER, NORM/TOO kHz.
Inserts
a
low pass
filter
configuration into
the
IN
PUT A
channel, attenuating
freque ncies above
100
kHz.
SEP/COM A. Input
amplifier
control, selects
independent
operation of
Inpuls
A
and B
in
SEP
(separate)
position
.
In COM A (Common A
)
position,
the
signal at Input A is
also
applied
to
Input B, with the
B input
BNC disconnected
from input circuitry.
Input B
coupling
is determined
by
Input A setting.
SLOPE. Selects triggering on either
positive
J
or
negative'\... slope
of the
corresponding
input channel.
Figure
3-8.
Front
Panel
Features
(Continued)
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