Section V
ADJUSTMENT
PROCEDURES
Model 3580A
b. Adjust the front panel CAL 10
KHz
pot fully
CCW.
c. Adjust the frequency synthesizer to - 20 dBV
10.0 kHz
output
(Option 002, adjust to - 20 dBm 900 Q)
and connect the synthesizer to the INPUT terminals
of
the
3580A.
NOTE
Always terminate
your
source properly and
consult
Table
5-14 for the setting needed for a
signal
source calibrated
in
dBm
50 Q
Figure
5-6 shows the proper hookup for use with a 50
ohm frequency synthesizer
such
as
the 3320B.
d. Adjust MANUAL VERNIER for a maximum display
indication.
e. Connect the
multimete~
(AC
mode,
10
volt range) to
A4
TPl.
Note the reading with the front panel 10
KHz
CAL
pot fully
CCW.
f. Adjust front panel CAL 10
KHz
pot for 1.26 times
the reading obtained in Step
e.
Examples:
100 mV x 1.26 = 126 mV
101mVx1.26
= 127 mV
102 mV x 1.26 = 129 mV
103
mV
x 1.26 = 130 mV
104
mV
x 1.26 =
131
mV
105
mV
x 1.26 = 132
mV
106 m V x 1 .26 = 134 m V
107 mV x 1.26 = 135 mV
108
mV
x 1.26 = 136 mV
109
mV
x 1.26 = 137 mV
110 mV x 1.26 = 139 mV
111mVx1.26
= 140 mV
112 mV x 1.26 =
141
mV
113
mV
x 1.26 = 142 mV
114
mV
x 1.26 = 144 mV
115mVx1.26
= 145 mV
116 mV x 1.26 = 146 mV
117
mV
x 1.26 = 147 mV
118 m V x 1.26 = 149 m V
119mVxl.26=150mV
120 mV x 1.26 =
151
mV
121mVx1.26
= 152
mV
122 mV x 1.26 = 154 mV
123 mV x 1.26 = 155
mV
124
mV
x 1.26 = 156 mV
125
mV
x 1.26 = 158 mV
126mVx
1.26=
159mV
127 mV x 1.26 = 160 mV
128
mV x 1.26 =
161
mV
129 mV x 1.26 = 163
mV
130 mV x 1.26 = 164
mV
131mVx1.26
= 165 mV
132 mV x 1.26 = 166 mV
133
mV
x 1.26 = 168 mV
SPECTRUM ANALYZER
hp
3580A
·~-~@
o
f"()\
f"(j\
50n
FEED-THRU
I..::'.) I..::'.)
TERMINATION
CJ CJ o (;:::\
hpll048C
8 0 8 @
~
~]::
_.:l1ia:~=):Oj}---.._
g.
Turn 3580A POWER
SWITCH
to OFF. Place
A4
on
extender boards. Turn the power switch back to
ON
and
reposition the following front panel control:
AMPLITUDE
MODE
.............
LINEAR
h. Push DISPLAY - CLEAR WRITE momentarily.
Adjust A4Ll (I.F.
AMP
GAIN ADJ.) for a maximum screen
display. Remove the source from the 3580A INPUT.
i.
Set the controls
of
the multimeter for
DC
mode, 1
volt range. Connect the multimeter to the rear panel
Y-AXIS
output
and adjust
A4Rll
(DC OFFSET ADJ.) for
0 volt Y-AXIS
output
level(± 10 mV).
j. Turn POWER switch to OFF, replace
A4
into card
nest
of
3580A, and turn power switch back
to
ON
(AC).
Reconnect the frequency synthesizer (with proper termina-
tion) to the 3580A INPUT. Push CLEAR WRITE momen-
tarily. Adjust the source to the same level
as
in Step c
(-
20
dBV
for standard instrument or -
20
dBm
900 Q
if
Option 002).
Table 5-14. Conversion Table.
3580A
INPUT
33208
or
OTHER
SIGNAL
LEVEL
50
OHM
SOURCE
+
10
dBv
+ 23.01
dBm
+10dBm900rl
+22.55
dBm
0
dBv
+ 13.01
dBm
o
dBm
900
n
+12.55dBm
-
10
dBv
+ 3.01
dBm
-
10
dBm
900
n
+2.55
dBm
-
20
dBv
- 6.99
dBm
-
20
dBm
900
n
-
7.45
dBm
-
30
dBv
- 16.9
dBm
-
30dBm900n
-
17.45
dBm
-
40
dBv
-
26.99
dBm
-
40
dBm
900
n
-
27.45
dBm
-
50
dBv
- 36.99
dBm
-
50
dBm
900
n
- 37.45
dBm
-
60
dBv
-
46.99
dBm
-
60
dBm
900
n
-
47.45dBm
-
70
dBv
- 56.99
dBm
-
70
dBm
900
n
- 57.45
dBm
-
80dBv
-
66.99
dBm
-
80dBm900rl
-
67.45
dBm
FREQUENCY
SYNTHESIZER
hp
33200
0 0 0 0 0
0 0 0 0
ca
rn
3580
- B -
3588
ABSOLUTE
VOLTAGE
3.162 volts
3 volts
1 volts
.949 volts
.3162 volts
.3000 volts
.1
volts
.0949 volts
.03162 volts
.03
volts
.01
volts
.095 volts
3162
mV
3mV
1
mV
.95mV
.3162
mV
.3mV
.1
mV
.095
mV
Figure 5-6. Proper Hookup.
5-22
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