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4 .
Increase the setting of
t
he freq uency selector in 1 MHz ste ps
b
etween
ι and 10 ΜΗι while observing the spectrum analyzer
d
is play . The
h
ar-
monics should
b
e ,26
d
8 below the fundamental .
R
ecor d the maximum
h
arm onic observed ιη the
d
isplay in
d
B
b
elow the fundamental on line 19
of the
P
T R ,
5.
Set the O UTPU T Step Αι te ηυατοr to 0
d
Bm, and re peat steps 3 and λ
at the. +3 d8 m outpu t level .
R
ecord
t
h e m aximum
h
armonic observed 6
dB below
t
he fundamental on 1l ne 20 of t h e ΡΤ R .
6.
On Model 3002, repeat steps 1 through 5 fo r Lever/I nd icator switch
setti ngs between 000.001 and 000.999, incremente d in 10 kH z steps.
N
ote
t he
h
armonic levels, but do not
r
ecor d
t
hem in the PTR as yet.
7.
Set the frequency selector to 10 MHz and
t
he OUTPU T Step Atie nu
ator to +10 dB m.
Β.
Set
t
he τΠ eεΙ rυm analyzer to measure
h
armonic distortion for funda-
mental frequencies
b
etween 10 and 520 MHz- Set the ha nd wi dth 1π 300
kH z and
t
he frequ ency span per division to 100 MHz,
9 .
Increase
t
he τeιt ιπ g of
t he frequ ency selector in 10 MHz steps ! π~
tween 10 an d 520 MHz wh ile ob servi n g the spectrum analy zer display.
T
h e
h
arm onics should be >30 dB below the fundamental .
R
ecor d
t
h e
maximum Ιιαίιτιοιιιc ohse ινιd in
t
he display
in
dB hclow the 1ιιη dαmεη t αΙ
on li ne 21 of the ΡΤ R .
10 . Set the OU TPU T Step Attenuator to 0 dB m and re peat steps 7 an d Β
,it t h e 43 λβ m ηυιρυι level. Record
t
h e maximum harmonic observed n
dB below t h e fundamer ι tal οπ line 22 of
t
he P T R.
Fu ndamental Range
(ΜΗι )
b
elow 3
3 to 250
3 to 350
3 to 520
Non-harmonic
R
ange
ΙΜΗ 7)
below 3
3 to 250
3 το 350
3 to 1000
N
om
h
armo nic leνcl
(dB c)
< -60
< -65
< -55
< -35
Α spectrum analyzer is
u
sed to
m
easure the level of non-harmonics at the
maximum specifie d οιιιριι t level of +13 d8 m .
4- 1 1
(8)
1 .
Set the instrument controls as follows:
FRE O VERN I ER
CA L
Frequency
selector
D01 .000 MHz (Model 30011
000.001 MHz I Model 3002)
M
OD UL ATIO N MOD E
CW
M
OD
UL
ATIO
N F
R
E
D
N/A
M
OD U LATIO N FΜ !ΑΜ
N/A
O UT PU T VERN IF R
Full εω
OUTPU T Step Attenuator
+10
d
8m
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