HP 5254C Operating And Service Manual page 23

Section
V
Model 5254C
Table
5-4. In-
Cabinet
Performance Check
(cont'd)
3.
ACCURACY:
same
as basic Counter,
a.
Set
Counter controls
as
follows:
SAMPLE RATE
. . .
.slightly
clockwise
out of
POWER
OFF
SENSITIVITY
IV
TIME BASE IS
FUNCTION
FREQUENCY
b.
Connect
HP
5105A/5110B Frequency Synthesizer
OUTPUT
to
Counter
AC
SIGNAL INPUT.
Load
the
Synthesizer with a
50-ohm
feedthrough
at
Counter
INPUT.
c.
Use
HP
106A/B
Frequency Standard
5
MHz
output for
Synthesizer time base.
Use
the
Frequency
Standard
1
MHz
output for the
Counter time base.
d.
Set
Synthesizer output frequency
to
010, 000, 000. 0
Hz,
at
a
level of 0
dBm
(0.224
volts
rms). Note
Counter reading.
e.
Disconnect Synthesizer
from Counter
INPUT.
f.
Change Counter
SENSITIVITY
to
PLUG-IN. Place 5254C
into
plug-in
compartment
of
HP
5245L.
g.
Connect Synthesizer
OUTPUT
to
5254C INPUT.
h.
Set
Synthesizer output
frequency
to
210
MHz
at a level of 0
dBm
(0.224 volts
rms).
i.
Tune 5254C
upscale
from
.
2
GHz
until first
meter
indication
is
obtained.
Note Counter reading
and
record.
Reading
must
be identical
with
that
obtained
in
step
d
(± 2
Hz).
j.
Connect setup as
shown
in
Figure
5-3. Set
Counter
controls
as
follows:
SAMPLE RATE
. . .
slightly
clockwise
out
of
POWER OFF
SENSITIVITY
PLUG-IN
TIME BASE
IS
FUNCTION
FREQUENCY
Figure
5-3
k.
Set
HP
2654A Frequency Standard Synchronizer as
follows:
IF
REF
(INT)
Depress
button
MODULATION
SENSITIVITY
0.
25
- 0.
5
MHz/V
APC
ON
1.
Set
HP
8616A
Signal
Generator
as follows:
FREQUENCY
Tune
for lock
at
2.
970
GHz
ATTENUATION
-13
dB
(50 millivolts into 50
ohms)
INTERNAL
(ALC)
Depress
button
EXTERNAL
(FM)
Depress
button
ALC CAL OUTPUT
Zero
set
m.
Set
5254
C
dial
for
maximum
meter
indication
at
2.
950
GHz. Counter should
indicate
20,
000.
000
kHz
(+2 Hz).
5-8