HP 5254C Operating And Service Manual page 11

Model 5254C
Section
III
f7^T]
5254C FREQUENCY CONVERTER
.15-3.0 GHz
LkCZJ
HEWLETT
•
PACKARD
1.
Refer
to
the Operating
Section
of
your
HP
Electronic
Counter Operating manual
for
counter
settings
as well as
installation
instructions
when
using
the
HP
5254C
plug-in.
2.
Connect
signal
whose
frequency
is to
be
measured
to
HP
5254C INPUT.
3.
Set
Mixing Frequency Control
to
read
slightly less than
0.
2
GHz.
4.
Slowly turn Mixing Frequency Control counterclockwise
to obtain
first
response,
and
tune for a
maximum
reading
in the
green
portion
of
the
Level
Indicator
Meter
scale. (See
below
for
examples
of
1, 2,
and
3
responses.
5.
Add
counter display
in (kHz)
to
Mixing Frequency Control reading
(GHz)
for fre-
quency
of
INPUT
signal.
Input
Freq
Display Meter
Dial
Response
EXAMPLE
OF ONE RESPONSE
3020
MHz
000000.00
MHz
Red
2.
95
GHz
(2950
MHz)
No
response, difference frequency greater
than
1
MHz
to 53
MHz
pass band
of video ampl.
000020. 00
MHz
Green
3.
0
GHz
(3000
MHz)
First response 3000
MHz
+
20
MHz
= 3020
MHz
EXAMPLES
OF
TWO
RESPONSES
1020
MHz
000020. 00
MHz
Green
1.
0
GHz
(1000
MHz)
First response 1000
MHz+
20
MHz
= 1020
MHz
000030. 00
MHz
Green
1.
05
GHz
(1050
MHz)
Second response
1050
MHz
-
30
MHz
= 1020
MHz
000050.00
MHz
Green
.85
GHz
(850
MHz)
First response 850
MHz
+
50
MHz
= 900
MHz
900
MHz
000000. 00
MHz
Red
.
90
GHz
(900
MHz)
No
response,
difference frequency
less than
1
MHz
to
53
MHz
pass band
of
video amplifier
000050. 00
MHz
Green
.
95
GHz
(950
MHz)
Second response
950
MHz
-
50
MHz
=
900
MHz
EXAMPLE
OF THREE RESPONSES
000051. 00
MHz
Green
.
8
GHz
(800
MHz)
First response 800
MHz
+ 51
MHz
= 851
MHz
851
MHz
000001. 00
MHz
Green
.85
GHz
(850
MHz)
Second response 850
MHz
+
1
MHz
= 851
MHz
000049. 00
MHz
Green
.
9
GHz
(900
MHz)
Third response
900
MHz
- 49
MHz
=851
MHz
*
Counter
in
.
1
ms
Gate
to
give reading
in
Megahertz
in
all
examples.
Figure
3-1.
Model 5254C
Operating Procedure
3-3/3-4