Tektronix FG 504 User Manual

Operating Instructions-FG 504 (SN Β 040000 & UP)
Output Connections
The output
of
the F
G 504 is d esigned to operate as α
50 Ω voltage source working into α
50
Ω
load . At h igher
frequencies, an unterminated or improperly terminated
output will cause excessive aberrations on the output
waveform
(see Impe d ance M atching d iscussion) . L oads
less than 50 Ω will re d uce the
waveform amplitude .
E xcessive distortion or aberrations,
due to improper
termination, are less noticeable at the
lower frequencies
(especially with sine and triangle waveforms) . To ensure
waveform p urity, observe the following precautions :
1 . U se
good
quality
50
Ω
coaxial cables and connec-
tors .
2 . M ake all connections tight and
as short as possible .
3 . Use
good q uality attenuators if it is necessary to
reduce waveform am p litude applied
to sensitive circuits .
4 . Use terminations
or impe d ance-matching devices to
avoid reflections when using long cable (6 feet
or more) .
5 . E nsure that
attenuators, terminations, etc ., h ave
adequate p ower h andling
capabilities for the output
waveform .
If there is α do voltage across the
output loa d , use α
coupling capacitor in series with t he load . The time
constant of the coupling capacitor and load mustbe long
enough
to
maintain p
ulse flatness .
If t he F G 504 is used in ear ly mo d els of t h e TM 500
Series
P
ower M o d ules, ripple on t he out p ut wave-
form can
be excessive in some cases
.
Th e ripple
r esults from P ower M odule transformer p hasing t hat
is incompatible with F G 504 operation ; however, t he
p r
oblem is easily cured . R efer to qualified service
personnel for
checking transformer
p
h asing .
O PER ATI N
G CO N SID ER ATIO N S
English 2-2
NO ΤΕ
CONTROLS AND CONNECTORS
FREQUENCY
(Hz) : Selects frequency of opera-
tion, or lowest frequency in
sweep mode
.
STOP FREQUENCY (Hz) :
Selects
h
ighest frequen-
cy in sweep mode .
FRED
=10
:
L
am
p
indicates when SYMMETRY
k nob is p ulle d out .
RUN : (Button out)
for
normal
operation
.
H OLD : (Button in) Disables the generator and
provides an output do level equal to the level of the
signal when t
he button was p ushed . (5 lower
frequency ranges
only .)
V CF INPUT : E xternally applied
voltage varies
output frequency .
FREQUENCY VERNIER : F
or
fine
frequency
variations .
MULTIPLIER :Determines range of FREQUENCY
d ial .
ί ~
AM
INPUT : E xternally applied signal mo d ulates
sine wave output .
9 Ο L ATCH : Pull to remove the p
lug-in
.
INPUT : A pply external gating, triggering,
or phase-
locking signals to this connector .
MAN :
P rovides α manual trigger in TRIG
operation
or manual gate in GATE o peration to control the
output waveform .
LEVEL : Selects the beginning voltage level on
INPUT
waveform for triggered, gated , or phase-
locked operation
.
Φ L OCK : B utton in locks output waveform frequen-
cy to signal applied to INPUT
connector
.
GATE : B utton in causes generator to produce α
waveform during α h igh level at the INPUT
connec-
tor .
T RIG : B utton in causes generator
to
produce
one
cycle of output waveform for each positive-going
INPUT signal .
16
FREE RUN : B utton in causes continuous output
waveform .
REV ΜΑΥ 1981

Tektronix FG 504 Specifications

General

Brand	Tektronix
Model	FG 504
Category	Inverter
Language	English