Table of Contents
Advertisement
5. Set the
L
.evet!In dtcator switches to 050.000 MHz and adjust thi!
OU TPUT VERN i f R for a ε 3
d
Rm ρηωεr mntef readinrς.
fi .
R
epeat step 4 Αιυν e εκεεμt observe
t
he maximum c h a nge in
t
hιι ρπωιιι
π,ετει
r
ea dings from
t
h e +3 dB m reading in step 5-
R
ecord t h e maximum
change
f
rom the +3 dBm readi ng to
t
he nearest 0.05 dB on line 12 ot
the PT R .
7. Set the Lever/Indicator switc h es to 050 .000 MHz and the OUTPUT
Step Atte nu ator to 0 d8 m. Adjust t h e OUT PU T VERN I E R
f
or α 7 d Β,rι
power meter reading.
Β.
R
epeat step 4 above except observe the maxi mum εh αηςςυ in τ hσ ροωοι
mete r r ead i ngs fr om t he -7 dBm reading in stop 7 .
R
ecord
t
he maximum
ch ange from the -7 dBm reading to t h e
n
earest 0-05 dB on li ne 13 of
the
P
T R.
4 .5 .3
STE P ATT ENU ATOR ACCURACY TEST
EQUIPMEN T
(51 (81 (91 (10)
PR OC EDURE
1 . Set the i nstrument controls as follows:
FRED VERNIER
CAL
Frequency sεΙκι : ιυι
520.000
M
OD UL ATIO N MODE
ΑΜ
M
OD UL ATIO N FRED
DC
MODULATION FM/AM
0% AM
ΠυΤΡ UΤ VERN I ER
Full εω
ΟιιΤΡ U Τ Stop Αιτεπυαtπ r
Π dBm
2. Set t h e power meter to
t
he +5 dBm range . Connect
t
he
p
ower se nsor
to t h e R F OUT connector,
3. Adj ust the OUTPUT VERN I ER control for α +3
d
8m
p
ower meter
r
ead ing.
4 . Disconnect t h e Power sensor from
t
h e front-panel RF
O
UT connector.
Conn ect α stand ar d 10
d
8 atte nu ator pad to the RF OUT connector
Connect the πιι tςιιιτ ο1
t
he attenuato r pad to the spectrum analyzer as
shown in
F
igure 4-1 .
5. Set t h e spectrum analyzer to 520 MHz, t h e
b
andwidth to 10 kH z, the
frequency span
p
er division to 2 kH z, and
t
he . tuning sta bilizer switch on .
Sat the vi deo filter to 100 Hz and the vertical
d
isplay to 2 dB per
d
ίv+sion
6. Use. t h e log refere nce controls to obtain α peak
t
race one division
below
t
h e log reference line ο 1
t
h e s pectr um analyzer
d
is p lay, Center The
trace in
t
he display with fine tuni ng.
7. Set the O U TPU T Step Αττρ rιιιι +tοr to -10 d B m,
Β. Disconnect t he 10 dB atte n uator
p
ad from
t
he setup and reconnect
the spectr um analyzer to the RF OUT connector.
9. Adjust the MODUL ATIO N FM/AM slider to
r
ealign
t
h e
p
ea k of "
, h,,
trace one
d
ivisio n below the log refere nce li ne as in step 6.
Α -9
Advertisement
Table of Contents
