In-Cabinet - HP 5254C Operating And Service Manual

Model 5254C
Section
V
5-43.
METER AMPLIFIER
HIGH
FREQUENCY
ADJUSTMENT
.
a.
With
counter
power
off,
connect converter to
a
HP
Model 5245
L
with Extension Cable
HP
10506B.
b.
Remove
the
twelve
screws which secure
MP12
(amplifier side plate)
and
remove MP12.
c.
Set
608E
Signal
Generator
to
450
MHz
at
50
mV
and connect
to
INPUT
of
converter.
d.
Connect
RF
Millivoltmeter,
through a
50-ohm
feedthrough termination
to
the
AUX OUT
jack
on con-
verter
front panel.
e.
Turn
counter
power ON, and
tune the converter
for
an indication
at
.
4
GHz;
the counter should display
50
MHz
to
51
MHz.
If
not,
adjust the Signal
Generator
frequency slightly so that
it
does.
f.
Adjust the output level of
the Signal
Generator
for
a reading
of
95
mV
on the
RF
Millivoltmeter.
g.
Adjust the
Meter High Frequency
adjust capaci-
tor
A5C21
until
Level
Indicator
Meter reads on
the
red/ green
line.
Table
5-4. In-Cabinet
Performance Check
1.
RANGE:
150
to
3000
MHz
(200
to
3000
MHz
for
5254B).
a.
Set
Counter
controls as follows:
SAMPLE RATE
slightly
clockwise
out
of
POWER
OFF
SENSITIVITY
PLUG
IN
TIME BASE
100
ms
FUNCTION
FREQUENCY
FREQUENCY CONVERTER
DIAL 200
MHz
b.
Connect
VHF
Signal Generator
to
plug-in. Set output level
of
Generator
to
0.
05V rms.
c.
Vary frequency
from
200
MHz
to
450
MHz,
keeping
the
output constant
at
0.
05V rms.
Reading
of
plug-in
dial
and Counter
display should be
correct frequency. Tune Converter
for
maximum
signal indication.
d. Substitute
UHF
Signal
Generator
for
VHF
Signal
Generator.
e.
Vary frequency
from 450
to
1200
MHz,
keeping
output constant
at
0.05V rms.
Note frequency
reading.
Converter
must
be tuned for
maximum
signal indication.
f.
Substitute the
800
MHz
to
2400
MHz
Generator
for the
450
MHz
to
1230
MHz
Generator.
g.
Vary
frequency
from
1200
MHz
to
2400
MHz,
keeping the output constant
at
0.
05V rms.
Note frequency readings. Converter
must
be tuned for
maximum
signal indication.
h.
Substitute
1.
8
GHz
to
4.
6
GHz
Generator
for the
1200
MHz
to
2400
MHz
Generator.
i.
Vary
frequency from
2.4 to
3
GHz, keeping
the
output constant
at
0.
05
V
rms.
Record
frequency range
steps
c, e,
g,
and
i
on
test
card.
2.
INPUT SIGNAL LEVEL:
50
mV
rms
(-13
dBm
in 50
ohms)
to
IV
rms
(+13
dBm
in 50 ohms),
a.
Input signal level specification
is
verified
by procedure
1,
RANGE
check.
5
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