Skip to Main Content
Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
39-31Magnetic Field Measurement
In the servoed type shown in Figure 39.25a, the magnetic eld being measured and the RF eld are
co
axial
. e fr
equency
of th
e
RF os
cillator
is mo
dulated
wi
th
a x
ed
lo
w-frequency
os
cillator
. i
s
ca
uses
th
e
RF to sw
eep
th
rough
th
e
La
rmor
fr
equency
. If th
e
sw
eeped
RF os
cillator
is no
t
ce
ntered
ab
out
th
e
La
rmor
fr
equency,
th
e
ph
otocell
ou
tput
sig
nal
wi
ll
co
ntain
a fu
ndamental
co
mponent
of th
e
RF
mo
dulation
fr
equency
. e ph
ase
of th
e
sig
nal
re
lative
to th
e
mo
dulator
os
cillator
de
termines
wh
ether
th
e
ce
ntral
RF is ab
ove
or be
low
th
e
La
rmor
fr
equency
. e ph
otocell
ou
tput
is ph
ase
de
tected
to pr
o-
duce
an er
ror
vo
ltage
th
at
is us
ed
to dr
ive
th
e
RF tow
ard
th
e
La
rmor
fr
equency
. e RF ca
n
be me
asured
to determine the
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Instrumentation and Control Systems, 3rd Edition

Instrumentation and Control Systems, 3rd Edition

William Bolton

Publisher Resources

ISBN: 9781439848913