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Model 5245L
02349
-1
o5245- B-r
r
Section
VI
Figure
6
-3
10. Plug-in
compartment
a.
Receives
plug-in unit to extendbasic
coun-
ter
capabilities. To install plug-in
(1)
turn
power
off, (2)loosen knurled
screw
at
side
of
compartment,
(3
)
remove
blark
panel
or
plug-inunit,
(4)
slide
desired plug-in unit
into place
and
tighten knurled screw.
b.
Permits
access
to
fine
and medium
fre-
quency controls through panel
at rear
of
compartment;
FIIIE
FREQ ADJ has
range
of
about
5
x
10-o;
MED FREQ ADJ
has
range
of about
1
x
10-6.
11.
COARSE
FREQ ADJ permits adjustment
of
oscillator over a
range
of about
1
x
10-5
.
L2.
MODE
a. Permits use of
external 1-Mc
frequency
standard
for
time-base control when
set
to EXT STD FREQ
(1 MHz)"
b.
Permits normal operation of
counter using
internal oscillator
w
h e
n
set
to INT
STD
FREQ.
c.
Permits scaling of
input signal by factors
of
10 when
set
to
SCALER.
13.
OUTPIJII
a.
Supplies selected frequency when
MODE
is
set
to
INT
STD FREQ
(see
text
for re-
strictions
).
b.
Supplies
scaled
input
f
requency
when
MODE
is
set
to
SCALER.
14.
sroRAGE switch provides display
storage
when
up;
continuous
display of internal
count
when
OFF
(down).
15.
AUX
A/AUX
B
(TIME
INTERVAL
TRIGGER
OUT
START
/STOP). Auxiliary plug-in
out-
puts.
See
appropriate plug-in
manual.
16.
Fuse provides overload protection;
should
be
2
ampere
slow
-blow
for
11
5
-volt
operation;
1
ampere slow-blow
for
230-volt
operation.
L7
.
Line
-voltage switch
permits selection
of
either
115-
or
23O-vac
line; insert narrow
blade
and
slide to
left for
115
v,
slide to
right for
230v.
18. AC LINE connector
connects
to flat
plug
on
power
cable.
19.
DIGITAL RECORDERconnector supplies BcD
information
to
recorder, analog converter, or
data
processing
equipment.
Figure
6
-3.
Operating
Controls (Rear
Panel)
6-?
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