HP 5245L - Page 45

Model
5245L
Table
3-2. In-Cabinet
Performance
Check
(cont'd)
3. Print
Command:
Negative
step
from +13
volts
to 0
volts, DC-coupled.
a.
Connect
Oscilloscope
to DIGITAL
RECORDER
jack
(Jl1)
pin
48.
b.
Set Counter
controls
as
follows:
SAMPLE
RATE
slightly clockwise
out of POWER
OFF
SENSITIVITY
to
CHECK
TIME
BASE
to 10
ms
FI]NCTION
to
FREQUENCY
c.
The
Oscilloscope
should display the
print
command
step
(-13
volts for
each counting
cycle).
Record
the amplitude
of this negative
step on test card.
4.
Hold-Off
Requirements:
+15V
min., +25Y
mrx.
from
chassis
ground
(tOOO-ofrm
source).
a.
Set Counter
controls
as
follows:
SAMPLE
RATE
slightly
clockwise
out of POWER
OFF
SENSITTVITY
to
CHECK
TIME
BASE
to 10
s
STORAGE
(on
rear
panel)
to non-storage
FUNCTION
to FREQUENCY
b. With
DC Power
Supply,
apply hold-off voltage, +25
volts
in
series with a
1000-ohm resistor
to
DIGITAL
RECORDER,jack
(J11)
Pin22
on the rear
panel.
The
Counter
should
stop
until
the
hold-off
voltage
is
removed from
Jtt,
pin
22.
Record hold-off
voltage on test
card.
c.
Repeat
step b, using +15
hold-off voltage.
Record hold-off
voltage on test
card.
Note
this
check
can
be made
using
any hold-off voltage from +15
volts
to
+25
volts.
GATE INDICATOR.
Front
panel
indication
of main
gate
'ropen"
state
a.
Set Counter
controls
as follows:
SENSITIVITY
to
CHECK
SAMPLE
RATE
slightly clockwise out of POWER
OFF
TIME
BASE
to
10 s
FIINCTION
to MANUAL
STOP
-
LEVEL
+
to
PRESET
b.
Set Counter
FUNCTION
switch to
MANUAL
START, the Counter
gate
lamp
should turn
on.
Record
results
on
test card.
RE-SET CAPABILITY.
A momentary
control on the front
panel
that returns
both
the displayed and
internal
count
to zero.
a.
Set Counter
controls
as follows:
SENSITTVITY
to CHECK
SAMPLE
RATE
slightly
clockwise
out of POWER
OFF
TIME
BASE TO
10s
FI]NCTION
to
FREQUENCY
-
LEVEL
+
to PRESET
b. Push front panel
RESET
pushbutton.
Counter
should reset
and then
start
a new
count.
Record
result
on
test card.
Section
Itr
Table
3-2
02349-1
3-
11