Tektronix FG 504

Calibratio n Pr ocedure- F G 504 (S NΒ 040000 & UP)
P erfo r ma n ce C h eck
ATTENU ATO R (dB)

O dB
V
A R
iable

F
ully
cw
TR IG LEVEL

M i d range
SY MME TR Y M i d ra n ge
b . Connect t he F G 504 output t h roug h α 50 Ω coaxial
cable a n d α 50 Ω termi n atio n to t he in p ut of α frequency
counter . C heck t h at t he outp ut freq u ency of t h e F G 504
does
not vary
more t ha
n
0 .05 ο
/
ο in ten minutes and n ot
more t han 0 .1 ο / ο for o ne h our .
3 . STO P FRE Quency Dial Accuracy
α . Set t he F G 504 con trols as follows :
H O L D/ RUN p us h butto n Out
FRE Q UEN
CY Hz
(STA R T) d ial

20
STO P d ial

40
MUL TI PL I ER 10 3
FRE Q UEN CY VERN I ER
(V A R)

F ully cw
TR IGG ER / FREE RUN
pus hbutton

FREE RUN
LEVEL control

M idrange
S
WEEP
pus
h
buttons

STO P
FRE
Q i n
W aves h ape pushbuttons

Sine W ave i n
O FF S E T control

P us h ed in
PHAS E control

M idra n ge
S
WEEP D
UR
ATIO N
switc h

lo s
V A R iable

F ully ccw
R IS E an d F A LL TIME
switc h

F IX ED
VAR iable

F ully ccw
ATT ENU ATO R (dB)

0
VAR iable

F ully
εω
TR IG LEVEL

M i d range
SY MME TRY

P ush ed i n an d midra n ge
b . Co nn ect t he F G 504 OU T PU T t h roug h α 50 Ω cable
and α 50 Ω termination tothe i np ut of afre quen cycounter .
C heck t h at t heout p ut frequency of the F G 504iswith in5%
of t h e d iffere nce b etween t he start an d stop freq u en cies
p
lus t
h
e
FRE
Q UEN CY Hz (STA
R T)
dial error .
4 . M aximum R a n ges for Swee p Freq ue n cy a n d VC F
M odes
4-4
α . Set t he F G 504 co n trols as follows :
H O LD/ RUN pus h butto n

RUN
FRE Q UEN CY Hz
(STA R T) d ial

40
STO Pd ial

40
b . Con n ect t he O UT PU T t hroug h α 50 Ω coaxial cable
and α 50 Ω termi natio n to t he i np ut of a frequency cou n ter .
V erify t h at t he outp ut frequency is over 40
MH z .
Connect
t he outp ut of
t h
e power
su pp ly to t he V C F i nput an d apply
α n egative voltage . V erify t h at t h e out p ut frequencygoes
to less t h an 0 .08 MH z before t he ap p lie d voltage reac
h
es
-9 .9 V . Disco n nect t h e power supply
.
c . Set t he FRE Q UEN CY H z (STA R T) dial to t he lowest
frequency e
n
d of
t h e d ial . Set t he MUL TI PL I ER to 10 5 .
U si
ng t h
e
FRE
Q
UEN CY VERN I ER, set t h e outp u t fre q ue n -
cy below 0 .004 MH z . Set t he S WEEP D UR ATIO N to 10
seconds, press t he STO P FRE Q button in an d verify t
h
at
t he output fre quency is eq u al to or over 4 .0 MHz .
ΝΟΤΕ
To
verify t he exact start and stop frequencies in t he
swe p t frequency mode, it will be necessary to use α
s p ectrum analyzer .
5 . L I N ear S WEEP
O U
T
PU
T Am p litu
d
e
Accuracy
α . Set t he F G 504
co
n trols
as
follows
:
H O LD/ RUN push butto n

RUN
FRE
Q
UEN CY
Hz
(STA R T) dial

1 .0
STO P d ial

40
MUL TI PL I ER 10 °
FRE Q UEN CYVERN I ER
(V A
R)

F ully cw
TR IGG ER / FREE RUN
pus h butto n

FREE RUN
REV ΜΑΥ 198
1
MUL TI PL I ER 10 6
FRE Q
UEN
CY
VERN I ER
(V A R) Fu lly cw
TR IGG ER / FREE RUN
push b u tton FREE RUN
LEVEL co n trol M i d ra n ge
S WEEP p us hb utto ns Out
W avesha p e pushbutton s Sine W ave In
O FF SE T control M idra n ge
PH AS E co
n
trol
M i d range
S WEEP D UR ATIO N
switc h Off
V A R iable F ully ccw
R
IS
E
a
n
d
F A LL TIME
switc h F IX E D
V A R iable F ully ccw
ATT ENU ATO
R
(d
B ) 0
d
B
VA R iable F ully cw
T R IG LEVEL M i d range
SY MME T RY M idrange