HP 5245L - Page 122

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-?