HP 5254C - METER AMPLIFIER HIGH FREQUENCY ADJUSTMENT

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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