HP 5245L Service Manual

Section III
Table 3-2
Table 3-2. Irr-Cabinet
Performance Check
(cont'd)
b.
Connect output from rear
panel
SCALER
RATIO
OUTPUT
jack
to
Oscilloscope
or
another
5245L.
c.
Connect output
of
Frequency
Synthesizer
to
Counter
DC SIGNAL
INPUT.
d.
Set Frequency
Synthesizer for 50
MHz
at
0.
1
V rms. The
scaled output should
be
5 MHz. Record
results
on test card.
2.
FACTOR:
by decade selectable from 10
to
109
a. Set
Counter controls as follows
SENSITMTYto.IVOLT
SAMPLE RATE
to
slightly
clockwise out of
POWER OFF.
TIME BASE
to
10 sec.
FUNCTION
to
MAN
START.
-
LEVEL
+
to
PRESET
MODE
(rear
panel)
to
SCALER
OUTPUT
(rear
panel)
to SCALER
RATIO
10.
b.
Connect rear
panel
SCALER RATIO
OUTPUT
to
the
Oscilloscope
or
another Counter.
c. Connect the
output of the Frequency
Synthesizer
to the
Counter
DC SIGNAL INPUT.
d.
Set Frequency
Synthesizer output
for 50 Mhz at 0. lV rms.
e.
Rotate rear
panel
OUTPUT
switch
through
SCALER
RATIO
positions
from
10
through
109.
The
OUTPUT
should
reduce
by a
factor
of
10
for each
setting.
Record results on
test
card.
PERIOD
'NEASUREffIENTS
1.
FREQUENCY
RANGE
SINGLE PERIOD:
0
to
1
MHz
a.
Set Counter
controls as
follows:
SENSITIVITYto.I VOLT
SAMPLE
RATE
to
slightly
clockwise out of POWER OFF
TIME
BASE to
.1
psec
FUNCTION
to 1
PERIOD AVERAGE
-
LEVEL +
to
PRESET
b. Connect output of Frequency
Synthesizer to Counter DC SIGNAL INPUT.
c. Set
Synthesizer
Frequency
for
1
Mhz at 0.
lV
rms.
d. Counter
should display
1
ps,
with decimal
point
correctly
positioned
and
measurement
unit
displayed.
Record
results
on test card.
2. FREQUENCY
RAT,IGE MULTIPLE
PERIOD:
0
to
300
kHz.
a, Set Counter
controls as follows:
SENSITTVITY
to.l
VOLT
SAIVIPLE
RATE
to
slightly
cloclnvise out of
POWER OFF
TIME
BASE
to
10
sec.
FIINCTION
to
PERIOD
AVERAGE
-
LEVEL +
to
PRESET
b.
Connect output of Frequency
Synthesizer
to Counter
DC
SIGNAL
INPUT.
c. Set Frequency
Synthesizer
for 300
kHz
at
0.
lV
rms.
d. Rotate
TIME BASE
switch cloclnrise to
.
1
ps
observing count. Slitch
FIJNCTION
switch
to
10
PERIOD
AVERAGE
and
rotate TIME BASE switch
counterclocliwise
through 10 sec
observing
count
at each
setting. Repeat
rotation
of TIME
BASE
switch
at
each
position
of
PERIOD
AVERAGE
switch. Record
results
on test card.
This
check also
checks
Item 5, OUTPUT DISPLAY.
Model 5245L
3-4
02349-1

HP 5245L Specifications

General

Brand	HP
Model	5245L
Category	Cash Counter
Language	English