Wavetek 3001 Instruction Manual page 40

crystal controlled oscillator. The instrument will
b
e tested at one CW
frequency to νιιίΓγ ι hαΙ t he crystal-εσπ i ιοΙΙη d oscillator operates withm
specified limits .
Wh en the FREQ V E R N I ER is not in CA L , the carrie r frequencies an ,
d
erive d from α voltage-controlle d oscillator in
a
ddition to
t
he crystal
controlled oscillator . Fre qu ency accuracy with
t
he FRED VERNIER not
in CA L will be measured b
y
u
tilizing DC modulation eq ual to maximu m
peak si ηιι soidal modulation in b
ot h FM modes . The FRE D VERN I ER
range will be tested in CW m o d e.
1 . Set t h e instrument controls as follows:
F RE Q VERN I ER
CAL
F
re
qu
ency selector 040.000
MHz
M OD UL ATIO N MODE
CW
MOD ULATIO N FRE Q
N/A
M
OD ULATIO N F MiAM
N/A
OUTPUT VERN I E R
Full cw
OUTPUT Stop Αιηιηυαιυ r +10 dB m
2. Connect the 50 ohm input of the frequ ency counter to t he RF OU T
connector .
3. The counter
s
hould read between 39,999 .60 an d 40,000 .40 kHz.
R xord
t
he counter reading to seven
p
laces on li ne 2 of the PT R .
4_ Set
t
he ίητι r ιιιπ eπΓ controls as follows -
FRE D VE RN I ER
0 kHz
F re q ue ncy selector
001 .000 MHz
M
ODUL ATIO N M OD E FM x1
M OD UL ATIO N F R EQ
DC
MOD UL ATIO N FM / Α RΛ
10 kH z
5. T
h
e fre
qu
ency counter s
h
o
u
l
d read
b
etween 999 .99 an
d
1,020.01
kH
z
.
R
ecord t he counter read ing to six places on line 3 of th e PT R .
6 . 5Ρτ th e
M
OD ULATIO N M OD E to FM x10.
7. T
h
e
frequency
co
u
nter s
h
o
u
ld rea
d
betwee
n
1,089.99
and
1,110,01
kH z. Recor d the counter reading to six places on line 4 of the ΡΤ R .
θ. Set t h e fr equ ency selector to 002.000 MHz.
9. Set the FRE Q VERN I ER to +3 kH z, and make α note ο1
t
he counter
r
ea ding in Ητ .
10 . Set the FRE Q VERN I ER to 0 kH z, and
s
ubt ract the frequency
counter r ea d ing in Hz from the reading i n step 9,
T
he
d
iffe rence shoul d b e
b
etween 2500 and 3500 H
z.
R
ecord
t
he diffe r e nce on li ne 5 of
t
he PT R.
Ι 1,
Set the FRE Q VERN I ER to -3 kH z, and subtract the frequ ency
ro ιι nter reading in
Ητ
f
rom
t
he
r
ea di ng at 0 kH z in step 10 . The
d
iffe r ence
shoul d be as in step 10-
R
ecor d
t
h e d
iffere n ce in Hz on li n e 6 of the P TR .
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