Tektronix FG 504 User Manual

O p erati
n g I n st r uctions- F G 504 (S N
Β 040000 & UP)
control ste ps . Α trigger
sig n al, one for eac h cycle of
t he
selecte d waveform,
is available at t
h
e
T R IG O UT PU T
co
nn ector .
Wh en
usi ng t he si ne or triangle
waveform out p ut wit h
t
h
e
MUL TI PL I ER in t he slowest
five p ositio n s, t h e
waveform output may
b e stopped by push ing t he H O L
D
button . T h e waveform
generator sto ps a nd
t he F G 504
outputs
α do voltage equal to t he
voltage t h e triangle or
si ne waveform reac hed
w hen t h e button was pu shed .
T h is
feature does
not
o p
erate on t he s q uare waveform
.
Wh en pulled out, t he SY
MME T R Y co n trol d ivides t he
output fre q uency (FRE
Q =10 in d icator lit) by te
n , and
varies t he time
based symmetry of t he
selected waveform .
Pull t
h
is
control an d turn for t he desired
symmetry u si ng
any of
t he t hree basic waveforms
.
Triggered or Gated
Operatio n
W it h t he F G 504 set for
free running o p eration as
described in t he previous
paragrap h s, ap ply the triggering
or gati n g sig
n
al to
t he I NPU T connector . If
only
οη
e cycle
of t
h
e
outp ut waveform p er trigger
is d esired, pus h t he
T R IG button and set t h e
LEVEL control for t he level on the
triggeri ng waveform at
w h ic h t he output waveform
is to
begi n . If more
t han one cycle of t h e
output waveform is
desired,
press t he GAT E pus h button
. T he F G 504 out p ut
now
begins at t h e triggeri
ng level an d continues un til t
he
waveform at t he i
nput co n nector drops below t he trigger-
i ng level . T he output
duration is now t he du ration of
t he
gating waveform
. The number of cycles p er
b urst may be
ap
proximated by d ividing t
h
e
gating signal duration byt
he
perio d of t he F G 504
outp ut fre q uency . 1 η t h e gate
d mode
of operation,
t he F G 504 always com p letes
t he last cycle .
If, at
t he terminatio n of t he gati
ng waveform, less t han
app roximately 270° of
t he last cycle remain s, an
ad-
ditional cycle is com
p lete d .
in triggere d or gated op
eratio n t h e PHAS E control
varies t he start of t he
tria n gle or si n e out p ut waveform
by
±80° .
T h
is p
h ase c han ge is measure
d from t h e 0 V, 0°
p
oint
on
t he out p ut waveform
.
To ma n ually trigger
or gate t he F G 504, tur
n t he LEVEL
control fully cloc
k wise and p us h t he T R I G or
GAT E button
as desire
d .
In
t he TR IG mode, pus
h i n g t he MAN button
triggers on e cycle of t he outp ut
waveforms . In t he GAT E
mode, t he selecte d output
waveform continues as lo
n g as
t h e MAN butto
n is p ressed i n .
V oltage Controlled F re q uency
Operation
T he output freque
n
cy of t
h
e
F G 504 ca n be swe p t over
α frequency range of
1000 :1, depe nding on
t h e
MUL TI PL I ER
setti n g, b y a pp lying α 0 V to
10 V signal to
En glis h 2-6
t he V C F I NPU
T con n ector . See F igure 2-3 for
t he max-
im u m
vcf ra n ge for eac h MUL TI PL I ER setti
n g . It may be
necessary to vary t he FRE Q
UEN
CY
VERN I ER control to
obtai n t he full 1000
:1 swept range or t he lowest
swe p t
frequency desire
d .
ί7
Ζ
f-
ω
ω
l7
Ζ
α
σ
σ
ω
J
α
J
Σ
10 6
10 5
10 °
10'
10 2
10 - ' ~
10 -2
10 -
'-
C
ustom positio n wit h factory i n stalle
d ca p acito r .
4
Hz

400 Hz
0 .4 Hz :

4
0 Hz
0 .04 Hz

4 Ητ
0 .004 Hz

0 .4 Hz
0 .001
Hz

0 .04 Hz
4
kH
z
80 kH z

40 MHz
400 Hz

400 kH z
40 Hz

4
0 kH z
20 Hz_

20 kHz
4 Hz

4 kHz
4 MHz
10 - '
10
-2
10 - '
1

10

10 2 10' 10
4
10 5 10 6 10' 10 8
Fr eq u en cy Hz
Custom Timing
R a n ge
2028-03
F ig . 2-3 . Graph s h owi n g
r ange of fre q ue n cies f o r each
MUL TI PL I ER setti n g t
h
at
can be swept wit h α 0 to 10 V
sig n
al
a pp lie d to t h e V C
F I NPU T .
The p
olarity of t he vcf in p ut signal
determines t he
d irectio
n t h e output fre q uency is
swe p t from t he fre quen -
cy
set by t he MUL TI PL
I ER, FRE Q UEN CY H z (STA
R T),
an d FRE Q UEN CYVERN
I ER controls . Α p ositive-going
voltage raises
t he fre quency w
h
ile
α n egative-goi ng
voltage
lowers t he frequen cy .
Α voltage t h at varies
symmetrically about 0
V swee p s t he out p ut freque
ncy
symmetrically about
t h e cen ter fre q uency d etermi
ned by
t he fre q ue
n
cy
controls (see F igure 2-3) .
Si n ce t he vcf
in p ut am p litude versus
frequency is α
linear
relatio n s h i p , t h e fre q uency
output may b e deter-
mine
d from t he vcf input
amplitude an d t he FRE Q
UEN CY
H z d ial p osition . VC
Fsen sitivityist he h ig
h
est
possibledial
setti n g (40)
times t he MUL TI PL
I
ER
ra nge d ivided by t he
maximum
V C F input voltage (10
V ) .I n t he F G 504,t h isisa
n omi n al sensitivity ( H z p er V)
.
of
4timest he MUL TI PL
I
ER
setting . F or example,
wit h α 10' MUL TI PL I ER
setti n g, α
two-volt ch a n ge at t
he V C F I NPU T will ch anget
h e output
fre q uency 8 kH
z .
T h is feature
permits t he user to
install α custom swe p t
freque
n
cy
range . T he .5
Χ
10'
position of t he MUL-
REV ΜΑΥ 1981

Tektronix FG 504 Specifications

General

Brand	Tektronix
Model	FG 504
Category	Inverter
Language	English