TEKTRONIX 5A38 Differential Amplifier Plug-in Module
Product Introduction: The Tektronix 5A38 is a specialized plug-in amplifier module compatible with the versatile 7000 Series oscilloscope mainframes. It provides high-sensitivity, differential input capability, allowing engineers to accurately measure small signal voltages in the presence of common-mode noise. Its design is optimized for applications requiring precise observation of fast, low-level waveforms in fields such as research, telecommunications, and analog circuit design.
Overview and System Integration
The Tektronix 5A38 embodies the modular philosophy of the legendary 7000 Series oscilloscope system. It is not a standalone instrument but a dedicated vertical amplifier plug-in that slots into a compatible 7000 Series mainframe (such as the 7704A or 7904). This system architecture allows users to configure a test instrument tailored to specific needs by combining various plug-ins for amplification, timebase, and other functions. The 5A38's primary role is to condition and amplify low-level analog signals before they are processed and displayed by the mainframe's CRT and measurement systems, effectively extending the oscilloscope's capability to handle challenging measurement scenarios.
Core Technical Features and Measurement Advantages
Differential Input and High Common-Mode Rejection
The defining feature of the 5A38 is its true differential input. Unlike a standard single-ended amplifier, it measures the voltage difference between its two input terminals (High and Low) while actively rejecting any voltage common to both. This results in a high Common-Mode Rejection Ratio (CMRR), which is crucial for accurately measuring small signals riding on large DC offsets or buried in electrical noise, such as those found in balanced communication lines or power supply control circuits.
High Sensitivity and Wide Bandwidth
The module offers exceptionally high sensitivity, allowing it to resolve minute voltage changes. It maintains this sensitivity across a wide bandwidth, enabling the observation of fast transient details in low-amplitude signals. This combination is vital for tasks like characterizing noise in precision analog circuits, analyzing jitter in clock recovery systems, or measuring the performance of high-gain amplifier stages.
Flexible Attenuation and Calibration
The 5A38 provides precise, calibrated deflection factors (volts per division). Users can select appropriate attenuation levels to optimally scale the signal on the oscilloscope's display. The module is designed for stable, repeatable performance and typically includes adjustment provisions for calibration to ensure long-term measurement accuracy, a critical requirement for quantitative analysis.
Representative Technical Specifications
The following specifications are characteristic of the Tektronix 5A38 differential amplifier module's performance profile.
Primary Applications and Engineering Use Cases
The Tektronix 5A38 is indispensable in scenarios where signal integrity and precision are paramount.
Precision Analog Circuit Debug: Measuring noise, offset voltages, and small-signal swings in operational amplifiers, instrumentation amplifiers, and sensor interfaces.
Differential Communication Line Analysis: Observing signal integrity on balanced lines (e.g., RS-422, CAN bus) without introducing ground loop errors.
Power Electronics Research: Safely measuring switching node voltages and current sense signals in switch-mode power supplies and motor drives where high common-mode voltages are present.
Physics and Materials Science Experiments: Detecting and amplifying low-level signals from transducers, detectors, or probes in laboratory setups.
Audio and Low-Frequency Equipment Design: Analyzing distortion, noise floor, and performance of high-fidelity audio equipment and low-frequency analog filters.
Operational Context and Historical Significance
Operating the 5A38 requires integration into a fully configured 7000 Series mainframe. When installed, it becomes the vertical deflection source for one channel of the oscilloscope. The mainframe provides power, the triggering system, the horizontal timebase, and the display. This modular approach, pioneered by Tektronix, offered unparalleled flexibility for mid-to-late 20th-century engineers. While modern digital oscilloscopes often integrate similar differential measurement capabilities, the 5A38 and the 7000 Series represent a peak of analog instrument design, valued for their immediate visual feedback, high waveform update rates (akin to an analog scope), and exceptional signal fidelity within their bandwidth.
Conclusion
The Tektronix 5A38 differential amplifier plug-in is a classic tool of precision measurement. Its ability to isolate and accurately amplify small differential signals made it a cornerstone for advanced electrical engineering work in its era. For those maintaining, restoring, or utilizing vintage 7000 Series systems, the 5A38 remains a powerful and relevant module for specific high-fidelity measurement tasks. It stands as a testament to an engineering philosophy that prioritized modularity, performance, and dedicated hardware solutions for solving complex measurement challenges.
- User name Member Level Quantity Specification Purchase Date
- Satisfaction ：
-
-
EATON SPD series surge protector -
EATON MVX9000 Variable Frequency Drive -
EATO NeasyE4 Micro PLC Easy Control -
EATON Cutler Hammer FP-4000 Medium Voltage Feedline Protection Relay -
EATON FP-4000 feeder protection relay -
EATON XT series stabilizing pump control box -
EATON MP-4000 motor protection relay -
EATON ELPRO 245U-E series industrial wireless Ethernet products -
EATON MTL4850 HART multiplexer complete guide -
Eaton Ambassador Counter Complete Guide -
EATON Crouse Hinds LED Explosion proof Lighting Guide -
Eaton 9000X Inverter Complete Guide -
Eaton S801+Soft Starter Complete Guide -
Eaton XV300 Multi Touch Display Screen -
EATON XV200 Micro Panel Comprehensive Guide -
Eaton CEAG CG Controller Comprehensive Guide -
Eaton K Series OPTIM Circuit Breaker Installation Guide -
EATON Series C Plastic Case Circuit Breaker and Motor Circuit Protector -
EATON MP-3000 Motor Protection Relay -
EATON XV-303/XV-313 series industrial multi touch HMI display -
EATON VISA series vacuum arc extinguishing chamber -
EATON FP-5000 protective relay -
Eaton IQ500 Series Multifunctional Power Mete -
EXOR eTOP Series 300 Operation Panel -
UniOP MD02F/R series compact HMI technology explanation and application guide -
UniOP CP02 series high-end compact HMI -
UniOP CP01R-04, CP05R-04, and CP01F-02 Compact Low Cost HMI Devices -
UniOP ECT-16 Industrial PLC Workstation Operator Interface System -
UniOP ePALM10 Handheld Human Computer Interface -
UniOP ePAD03/ePAD04 Human Computer Interface -
Union Special XF500 Industrial Sewing Machine Maintenance Guide -
UniOP Operation Panel Installation and Maintenance Guide -
UniOP eTOP306 Industrial Touch Screen -
UniOP Universal Operation Panel Installation Guide -
ABB AX400 series low conductivity analyzer(AX411/511010) -
Allen Bradley SLC 500 Programmable Controller System Selection Guide -
WITTENSTEIN alpha LP+/LPB+low backlash planetary gear reducer -
ABB AX400 Series AX460/AX466 pH/ORP Analyzer User Guide -
ALSTOM ALSPA series drives -
ALSTOM ALSPA P1200NT Tripping and Control Relays -
GE MVAJ Trip Relay: Protection and Control Core -
GE Vernova MVAW 11/13/21 type intermediate relay -
ALSTOM ALSPA MV1000 Intelligent Variable Frequency Drive -
GE Vernova MMLG/MMLB Test Blocks and Test Plugs -
Baker Hughes 1900/65A General Purpose Equipment Monitor -
DEIF LSU-112DG generator set parallel control unit -
DEIF PPM 300 Ship Power Generation Management Controller -
DEIF DELOMATIC 3 Generator Set Control System -
DEIF DELOMATIC 400 Gas Engine Unit Control System -
DEIF Multi line 2 Option X Guide -
Dell EMC Networking X-Series Switches -
Eaton MP-3000 Motor Protection Relay Guide -
Eaton TX series cam switch and PX series load isolation switch -
Eaton XControl Modular PLC Complete Guide -
Eaton XVS400 5.7-inch Touch Screen Analysis -
Emerson PAC8000 Remote I/O Complete Analysis -
Eaton XV Supercapacitors Complete Guide -
Eaton XV400 Industrial Tablet Complete Guide -
Eaton Plastic Case Circuit Breaker Technology Analysis and Application Guide -
Emerson PR9268 Electric Speed Sensor -
Emerson Micro Motion High Precision HPC010/HPC015 Series High Pressure Coriolis Flow Meter Installation Guide -
Emerson PACSystems RX3i Programmable Automation Controller -
Emerson AMS 6500 ATG Machinery Protection System -
Emerson Ovation I/O System -
Emerson DeltaV ™ S-series Traditional I/O -
EMERSON DeltaV™ M-series Traditional I/O -
Oil Proof Fans San Ace 40WF, San Ace 60WF, San Ace 80WF, and San Ace 92WF -
FANUC α i Series Servo and Spindle System Maintenance Guide -
GE i Series CNC System Operation Panel Comprehensive Guide -
FANUC Series 0+-MODEL F Plus -
FANUC α i-B/β i-B series servo system -
HIMA ELOP II-NT Safety PLC Programming System -
HIMA HIMax Safety Related Controller System -
HIMax X-FAN system fan -
HIMA H41q/H51q Safety PLC System -
HIMA HIQuad X Series Safety Programmable Electronic System (PES) -
HIMA HIMatrix series compact safety controller -
HIMA HIMatrix F3 DIO 20/8 02 Series Safety Related Remote I/O Modules -
HIMA F8650X Safety Central Module -
HIMA H41q and H51q series programmable electronic systems (PES) -
HIRSCHMANN PowerMICE series industrial Ethernet switches -
HIRSCHMANN MS20/MS30 series industrial Ethernet switches -
HITACHI SAM PS100 series pressure based PI mass flow controller -
HITACHI Advanced Server DS7000 Series Scalable Servers -
HITACHI LH1 series universal vector frequency converter -
HITACHI frequency converter Cs-H100 series -
MVH series high temperature resistant aluminum electrolytic capacitors -
HITACHI EH-150 PLC in depth analysis: characteristics, instructions, and system design -
Honeywell Fusion4 MSC-L Multi Stream Loading Controller -
Honeywell IPC 620-06 Programmable Controller -
Honeywell Enhanced Micro TDC 3000 Control System -
Honeywell Expert LS I/O System -
Honeywell Expert PKS Universal Process Cabinet -
KEBA KeConnect I/O: Modular Industrial Automation I/O System -
KEBA FM 299/A GA1060 fieldbus main module -
KEBA KeControl C1 CP 03x: Highly Integrated Embedded Industrial Controller -
KEBA KeControl series controllers -
KEBA KeConnect C5: High density modular IO system empowering industrial automation -
KEBA DI 260/A Digital Input Module -
Kollmorgen SERVOSTAR 600 (S600) series digital servo drive -
Kollmorgen S300 Servo Drive Application Guide -
Kollmorgen H series brushless servo motor and Silverline driver -
Kollmorgen Servo System Product Guide -
KOLLMORGEN S200 High Performance Compact Brushless Servo Drive -
KOLLMORGEN IDC EC Series Electric Cylinder Configuration and Application Guide -
Selection and Application of KOLLMORGEN E/H Series Stepper Motor -
Kollmorgen AKD/S700 series servo drive -
KOLLMORGEN Digifas-7200 Digital Servo Amplifier Application Guide -
Kollmorgen SERVOSTAR-CD servo drive hardware installation and system configuration -
MOOG QAIO 16/4 Analog I/O Module Technology Analysis and Application Guide -
MOOG G128-809A DIN rail power supply -
MOOG MSD Multi Axis Servo Drive System (DC-AC) -
MOOG DM2020 Multi axis Servo Drive -
MOOG M3000 ® Control system and MSC servo controller -
MOOG G123-825-001 DIN rail buffer amplifier -
MOOG Servo Electronics Products -
MOOG T161 Series Rack Mount Digital Brushless Motor Controller -
Motorola PTX series (PTX700/760/780) portable walkie talkies -
MOTOROLA MVME2400 series VME processor module -
MOTOROLA CPCI-6020 CompactPCI Single Board Computer -
Motorola MVME162 Embedded Controller -
Reliance Electric Engineering Drive System and DBU Dynamic Braking Unit -
RELIANCE ELECTRIC INVERTRON DBU Dynamic Braking Unit -
Reliance 57C413B/57C423 common memory module -
Rockwell Automation AutoMax™ Distributed Power System -
Reliance Electric AutoMax Programming Executive V3.5 -
Deep Analysis and Industrial Control Application of Reliance DCS 5000 Enhanced BASIC Language -
Rockwell Automation MD60 AC Drive
