Tektronix FG 504 User Manual

Τ 1 PL I ER switc h is used for t he custom range . The factory-
installed capacitor (C248) for t h is p osition of t he
MUL TI PL I ER switc h provides α
swept range from 20 H zto
20 kH z .
Ph ase L oc k e d O p eratio n
Th e frequency of t he outp u t waveform may be syn-
ch ronized wit h an externally-applied
reference sig n al .
P roper ad j ustme n t of t he LEV EL and PH AS E co n trols is
easier if
t
hey are a dj uste d first i
n
t h e TR IG mode
.
Set t he
FREE RUN frequen cy of t he F G 504 somew h at h ig h er
t han t he fre q ue n cy of t he refere nce sig n al ap p lied to t he
I NPU T co nn ector, a nd t hen select t he TR IG mode . A dju st
t he
LEVEL
co
n trol for
stable
triggeri ng
a
n
d
(if viewing
on
an oscilloscope) ad j ust t h e out p ut frequency of t he
F G 504 un til it is n early t he same as t he fre quen cy of t he
signal applie d to t h e I NPU T connector . Set t he PH AS E
control at 12 o'clock (for 0° wit h sine wave selecte d ) an d
press Φ L
OC
K . R
ea
dj ust t h e PH AS E control, if necessary,
to obtain α stable out p ut at t he desired phase . T h e PH AS E
co n trol ra nge decreases above 4 MH z .
Α j umper allows t h e V C F I NPU T to function as α phase
mod u lati n g i np ut w hen t he F G 504 is o p erated i n t he
REV ΜΑΥ 1981
Ope r ating I n str u ctions- F G 504 (S N Β 040000 & UP)
Th e outp u t freque
n
cy of t he
F
G 504
m
u st be
set
to
wit h in
±10 ma j or d ial d ivisions of t h e frequency of t
h
e
externally
ap p lied sig n al (t he "1" on t he dial is t he lowest ma j or dial
divisio n ) . Connect t he refere n ce sig n al to t he I NPU T
connector and p us
h
t
h
e Φ
L
OC
K pu
s
hbutton . T he PH AS E
co n trol varies t he ph ase of t h e output waveform±80° wit h
res p ect to t he reference signal waveform . T he LEVEL
control ad ju sts t he triggeri ng p oi n t on t he reference
wavefo r m .
F ig . 2-4 . Swept f r equency r ange wit h 10 V sig n al a p plied to V C F IN conn ecto r .
PH AS E L OC K mode . T h e ph ase mod u lati ng i nput voltage
limits are ±2 .5 V,
wit
h an
u
p per frequency limit of
1
kH z
.
Wh
en
p h
ase
loc ked , t h e ph ase modulating voltage varies
t h e output ph ase by a pp roximately 5°/ V .
Amplitude M odulating In p ut
To amplitude modulate t h e out p ut waveform, connect
t h e mo d ulating sig n al to t he AM I NPU T co nn ector . Push
t h e SI NEW A VE pus h butto
n
and set t he FRE Q UEN CY
Hz
dial for
t h
e
d esire d carrier frequency
.
R efer to t h e
Am p litu d e M o d ulating In p ut s p ecification for more i n for-
mation about t h is mode of operatio n .
En glis h 2- 7

Tektronix FG 504 Specifications

General

Brand	Tektronix
Model	FG 504
Category	Inverter
Language	English