HP 5245L Service Manual

Section
III
Tables
3-1
and 3-2
Model
5245L
Table
3-1.
Recommended
Test
Equipment
(cont'd)
Instrument
Type
Required
Characteristics
Use
Instrument
Recommended
Counter
10
MHz,
100
mV
sensitivity,
+
I
count +
time
base.
Performance
Check
HP Model
5245L
Mixer
10
MHz,
50O
impedance,
40
mW
sensitivity mElx.
Performance
Check
HP Model
105144
Impedance
Transformer
1000 ohms
to 50
ohms Performance
Check
Digital
to Analog
Converter
L-2-2-4 BCD
code Performance
Check
HP Model
581A
Strip-Chart
Recorder
Performance
Check
Moseley
6804.
Low-Pass
Filter
1
kHz
Performance
Check
Frequency
Synthesizer
Precision
signal
source
0
to 50 MHz
Performance
Check
HP Model
51004/5110A
Coax Attenuator
Variable
from
0 to
120
dB
in
10 dB
steps
Performance
Check
HP Model
355D
Coax
Attenuator
Variable
from
0
to 12 dB
in
1 dB steps
Performance
Check
HP
Model
355C
Note:
The
Variable
Coax
Attenuators
are
used to adjust
the
output
signal level
of
the
Frequency
Synthesizer
and
should be
used
with
the
Frequency
Synthesizer
for
all
checks.
Table
3-2.
In-Cabinet
Performance
Check
FREGI
UEN CY'NEA
SU
RETIENTS
1. RANGE:
DC
coupled:
0
to 50 MHz
AC
coupled:
25
Hz
to 50
MHz
DC INPUT
a.
Set Counter
controls
as follows:
SENSITIVITY
to
.1
VOLT
SANIPLE
RATE
slightly
clockwise
out
of
POWER
OFF
TIME
BASE
to
.1 s
FUNCTION
to FREQUENCY
-
LEVEL
+
to
PRESET
b. Connect
output
of Frequency
Synthesizer
to
Counter
DC
SIGNAL
INPUT
and to Oscilloscope
input
with
BNC
'rT"
connector.
The oscilloscope
is used
to monitor
the input
signal.
c.
Vary
frequency
of Frequency
Synthesizer
from 0
to 50 MHz
at 0.
1V rms
(0.28
V
peak-to-peak).
d. To
check for
pulse
operation,
connect
Pulse
Generator
to DC INPUT
connector
of Counter
with
normal
recommended
load.
Set Pulse Generator
for
1
psec,
1 volt
pulse
of the
polarity
used
to
adjust
the
trigger
bias
with
a 500
pps
repetition
rate. Vary
-LEVEL+ control
until
count is
obtained.
3-2
02349-1

HP 5245L Specifications

General

Brand	HP
Model	5245L
Category	Cash Counter
Language	English