Tektronix FG 504

27 . Ad j ust Si
n e Gain ( R 855)
A dj ust R 855 (Si ne Gain) on
t he Α 2 FUN CTIO N boar d
so t
h
e si
n
e
wave amplitude exactly matc h es t h e triangle
waveform am p litude w h ile alternately p ressing
t h
e
si ne
wave and triangle pus
h
butto
ns . Disconnect all cables .
28 .
A d j ust Sine Drive (Distortio n ) ( R 740, R 155, R 52,
R 360, R 215)
Push t he si ne wave pus hb utto n in . Set t
h
e
FRE-
Q
UEN CY Hz (STA R T) d ial to 40 . Con n ect t
h
e
F
G
504
O UT PU T connector t h roug h α 50 Ω cable to
α 50 Ω
termi n atio n at t h e distortion analyzer
i np ut (use α bnc
female-to- b anana p l ug adapter
if n ecessary) . Set t he
Calib r atio n Pr oce
d u r e- F G504 (S NΒ 040000 & UP)
Ad ju stment
Pr oce d ure
distortio n an alyzerto40 kH z . Ad j ust
R
740 (Sine
Drive) on
t h e Α 2 FUN CTIO N board for mi n imum
distortio n . It may
be n ecessary to slig
h tly re-ad j ust R 52 (Top Dial Sym Cal)
in ste p 6 an
d R 360 (Tria n gle DC L evel) i n step 5to ac
h
ieve
α
mi n i m um distortion read i ng on t he distortion a
n alyzer .
C h ange t he FRE Q UEN CY Hz (STA R T) d ial
setting to 4
an d t h e distortio n analyzer to
4 kH z . Touc h up R 740 (Sine
Drive) an dR 155 (
M in Dial Sym Cal) for minimum d istor-
tion
rea d i ng . R epeat t h is ste p as necessary to ac
h ieve
mi n imum d istortion readi n g . Set
t h e MUL TI PL I ER to 10
and d istortio n alayzer to
40
Hz .
Touc h up R 215 (LF Sym
Cal) a
dju stme n t in ste p 8for least d istortion (0 .5 ο/ο or less) .
R emove p ower from t h eF G 504 ; d
isconnect test eq ui p -
ment a nd extender cables .
R e-con nect R 14 to its o r igi n al
circuit co nnection
.