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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
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