Wavetek 3001 Instruction Manual page 45

4.6
H
ARM ON ICS TE ST
METHOD
E
Q
U
I
PMEN
T
P
ROCE
D
UR E
4- 1 0
10 . Disconnect the cable, from t he front-panel PIP OUT connector. Con-
elect it,,! power τεηsοι
ιιιαχιπ ιΙιε O U T PU T
$Ιπςι
ΑΓΙCιιυαίοι ( η Π dΛιιι .
11 . Observe the
d iffeencι between the αε tιιαΙ power meter reading and
t
he +7
d
Βm re ference setting in step 3. The
d
ifference or error should he
±Ο 7 dB maximu m
. R ecor d
t
he error an line 14 of t h e PT R.
12- Repeat steps 3 t hro ugh 11 using the standard attenuato r pads
a
nd
t
he
inst ru tnerι l OUTPU T Stop Λτ le πιια [οr settings in dicated in the, following
ta ble .
Steps 4 and 8
Step 7
Step 11
Λττeηυαtοr pad
OUTPUT Step Αττ eπυατοr
R
ecord E rror on
{d Β 1
setting (d8m1
L
ine of
P
TR
20
20
15
30
30
16
60
δ0
17
90
90
18
NOTE :
To test t h e O UTP U T Step Attenuator
b elow .60
d
8m, an RF
a
mp lifier (> 20 dB gainl is re qu ired. Insert
t
he amp lifier b etween
t
he
sta
nd
ar
d
αt τεηυαt οι
pad
a
n
d
t
h
e s
p
ect
ru
m a
n
alyzer (
F
ig
u re 4-1) . T
h
e
allowa ble er ror for th e -90 d
8m setting (ste p 11) is +1 .5 dB . Th e O UTPU T
Ste p Αττp . ηυαtοι can
b
e teste
d
down to t h e -130
d
Bm
p
ositio n if α 40 dB
R F amplifier is used and if
p
reca utions are ta ken to prope rly shield
t
h e R F
output fr om the Instrument proper .
SPECI F ICATIO N
< 30 λβc frnm -001 to 1 MH z ( M odel 30021 a
n
d 10 to 520 MH z
< , 26
d
Βε fro m 1 to 10 ΜΗτ
Α spectrum analyzer is used to meas ure
h a r monics in the frequ ency range
of the instrument at 413 and +3 d8m output levels .
ί 81
1 . Set the instrument cont rols as follows :
FRED VERN I ER
CA L
Frequency selector
001 .000 MH z
MODULATION MODE CW
M
OD ULATIO N F
R
EQ N/A
M
OD ULATIO N FM/AM N/A
OUTPU T VER
N
I E R Fu ll εω
OUTPUT Step Atte nu aτor
+10 dBm
2,
ςηηη cεt t he instrument RF OUT connecto r to t h e RF input of thp
s
pectrum
a
nalyzer .
3. Set the spectrιι oι analyzer to measure harmonic
d istortion for funda-
mental
f
mguencίes he ιωcen 1 an d 10 MHz . Set the band wi
d
th to 100 kH z,
t
he frequency span
p
er
d
ivision [υ 5 MHz, an d the
d
is play to 10 dB / d iv .
L
ocate the zero reference at
t
he left edge of the gτaticule, and ad j ust t he
Il υπλα me πtαΙ amplitude to th e log
r
eference line (0
d 8) in t h e d
is play.