Electrónica de Instrumentação

Electrónica de Instrumentação
Analisador Logico
© Jorge Guilherme 2008
#100
Electrónica de Instrumentação
Sinal digital
Permite ver muitos sinais logicos em
simultâneo
© Jorge Guilherme 2008
#101
Electrónica de Instrumentação
© Jorge Guilherme 2008
#102
Electrónica de Instrumentação
Aquisição de sinais
© Jorge Guilherme 2008
#103
Electrónica de Instrumentação
© Jorge Guilherme 2008
#104
Electrónica de Instrumentação
Analisador de Redes
© Jorge Guilherme 2008
#105
Electrónica de Instrumentação
Network Analyzer Basics
© Jorge Guilherme 2008
#106
Electrónica de Instrumentação
Network Analysis is NOT.…
Router
Bridge
Repeater
Hub
Your IEEE 802.3 X.25 ISDN
switched-packet data stream
is running at 147 MBPS with
-9
a BER of 1.523 X 10 . . .
© Jorge Guilherme 2008
#107
Electrónica de Instrumentação
Low
Integration
High
What Types of Devices are Tested?
Duplexers
Diplexers
Filters
Couplers
Bridges
Splitters, dividers
Combiners
Isolators
Circulators
Attenuators
Adapters
Opens, shorts, loads
Delay lines
Cables
Transmission lines
Waveguide
Resonators
Dielectrics
R, L, C's
Passive
© Jorge Guilherme 2008
RFICs
MMICs
T/R modules
Transceivers
Receivers
Tuners
Converters
VCAs
Amplifiers
Antennas
Switches
Multiplexers
Mixers
Samplers
Multipliers
Diodes
Device type
VCOs
VTFs
Oscillators
Modulators
VCAtten’s
Transistors
Active
#108
Electrónica de Instrumentação
Lightwave Analogy to RF Energy
Incident
Reflected
Transmitted
Lightwave
DUT
RF
© Jorge Guilherme 2008
#109
Electrónica de Instrumentação
.
What is the Difference Between
Network and Spectrum Analyzers?
Measures
known
signal
Amplitude
Amplitude Ratio
8563A
measure components, devices,
circuits, sub-assemblies
contain source and receiver
display ratioed amplitude and
phase
(frequency or power sweeps)
offer advanced error correction
© Jorge Guilherme 2008
9 kHz - 26.5
Measures
unknown
signals
Frequency
Network analyzers:
SPECTR UM AN ALYZ ER
GHz
Frequency
Spectrum analyzers:
measure signal amplitude characteristics
carrier level, sidebands, harmonics...)
can demodulate (& measure) complex signals
are receivers only (single channel)
can be used for scalar component test (no
phase) with tracking gen. or ext. source(s)
#110
Electrónica de Instrumentação
Generalized Network Analyzer
Block Diagram
Incident
Transmitted
DUT
SOURCE
Reflected
SIGNAL
SEPARATION
INCIDENT
(R)
REFLECTED
(A)
TRANSMITTED
(B)
RECEIVER / DETECTOR
PROCESSOR / DISPLAY
© Jorge Guilherme 2008
#111
Electrónica de Instrumentação
Source
Supplies stimulus for system
Swept frequency or power
Traditionally NAs used separate
source
Most Agilent analyzers sold
today have integrated,
synthesized sources
© Jorge Guilherme 2008
#112
Electrónica de Instrumentação
Incident
Signal Separation
Transmitted
DUT
Reflected
SOURCE
SIGNAL
SEPARATION
INCIDENT (R)
REFLECTED
(A)
TRANSMITTED
(B)
RECEIVER / DETECTOR
PROCESSOR / DISPLAY
•
•
measure incident signal for reference
separate incident and reflected signals
splitter
bridge
directional
coupler
© Jorge Guilherme 2008
Detector
Test Port
#113
Electrónica de Instrumentação
High-Power Amplifiers
Preamp
8753ES
Source
Ref In
Preamp
AUT
DUT
R
B
A
AUT
+43 dBm max input (20 watts!)
8720ES Option 085
85118A High-Power
Amplifier Test System
© Jorge Guilherme 2008
#114
Electrónica de Instrumentação
Sinal de video
Geração
da
imagem
TV
© Jorge Guilherme 2008
#115
Electrónica de Instrumentação
© Jorge Guilherme 2008
#116
Electrónica de Instrumentação
© Jorge Guilherme 2008
#117
Electrónica de Instrumentação
Sinal de teste video
© Jorge Guilherme 2008
#118
Electrónica de Instrumentação
Efeito de um pulso na imagem
© Jorge Guilherme 2008
#119