Agilent Technologies 83620A User Manual

15.
Pulse
Modulation
Video
Feedthrough
Description
and Procedure
In CW,
at sp
ecied
maxim
um
lev
eled
p
o
w
er,
the
syn
thesizer
is
pulse
mo
dulated
using
a
pulse
generator.
The
syn
thesizer's
RF
output
is
ltered
(only
the video
feedthrough
passes),
amplied,
and displa
yed
on an
oscilloscop e.
Because
of
the lo
w
amplitude
of
the
video
feedthrough,
a
preamplier
is
used
in
the
test
setup;
system
gain
m
ust
b
e
considered
when
making
this
measuremen
t.
When
video
feedthrough
is
expressed
as
a
p
ercen
tage,
the
follo
wing
equation
is
used:
Video
feedthrough
(%)
=
[(video
Vp/carrier
Vp)
x
100]/video
gain
1.
Preset
all
the
instruments
shown
in
Figure
2-21
and
let
them
w
arm
up
for
at
least
one
hour.
2.
T
o
ac
hiev
e
p
eak
p
o
w
er,
turn
on
RF
p
eaking:
4
USER
CAL
5
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NN
N
Tracking
Menu
N
N
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NN
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N
Peak
RF Always
(asterisk
on)
3.
Connect
the
equipmen
t
as
sho
wn
in
Figure
2-21
with
the
pulse generator
connected
directly
to
c
hannel
1
of
the
oscilloscop
e
(A).
HP 8360 Performance Tests
Pulse Modulation Video Feedthrough
2-87
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Agilent Technologies 83620A Specifications

General

Brand	Agilent Technologies
Model	83620A
Category	Blower
Language	English