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MECA Electronics Attenuators

Navy Electricity and Electronics Training Series (NEETS)
Module 16—Introduction to Test Equipment
Chapter 6:  Pages 6-41 through 6-46


Table 6-1.—Description of Front Panel Controls, Indicators, and Connectors

Description of Front Panel Controls, Indicators, and Connectors - RF Cafe




Table 6-1.—Description of Front Panel Controls, Indicators, and Connectors—Continued

Description of Front Panel Controls, Indicators, and Connectors—Continued - RF Cafe




Table 6-1.—Description of Front Panel Controls, Indicators, and Connectors—Continued

Description of Front Panel Controls, Indicators, and Connectors—Continued - RF Cafe




Table 6-1.—Description of Front Panel Controls, Indicators, and Connectors—Continued

Description of Front Panel Controls, Indicators, and Connectors—Continued - RF Cafe

With power applied (power knob pulled out), the spectrum analyzer will automatically (upon microcomputer control) go into the following conditions. If you do not find these indications, there is a probably a problem with the unit.
·   Vertical display: 10 dB/div;
·   Frequency: 0.00 MHz;
·   REF level: +30 dB;
·   RF attenuation: 60 dB;
·   Frequency range: 0.0 to 1.8 GHz;
·   Auto resolution: 1 MHz;
·   Resolution bandwidth: 1 MHz;
·   Freq Span/Div: Max;
·   Triggering: Free run;
·   Readout: On;
·   Digital storage: View A/View B On;


·   All other indicators off or inactive.


Now that we have completed this chapter, we will briefly review the more important points covered. A CATHODE-RAY TUBE (CRT) is used in an oscilloscope to display the waveforms.
The CRT used in oscilloscopes consists of an ELECTRON GUN, a DEFLECTION SYSTEM, and a FLUORESCENT SCREEN.
The ELECTRON BEAM in an oscilloscope is allowed to be controlled in any direction by means of HORIZONTAL- and VERTICAL-DEFLECTION PLATES.
VERTICAL-DEFLECTION PLATES are used to show AMPLITUDE of a signal.
A GRATICULE is a calibrated scale of AMPLITUDE VERSUS TIME that is placed on the face of the CRT.
A DUAL-TRACE OSCILLOSCOPE is designed to accept two vertical inputs at the same time. It uses a single beam of electrons shared by two channels.
The SPECTRUM ANALYZER accepts an electrical input signal and displays the signal’s frequency and amplitude on a CRT display.


A-1.   Control grid.
A-2.   The first anode.
A-3.   Because they bend electron streams in much the same manner that optical lenses bend light rays.
A-4.   It accelerates the electrons emerging from the first anode.
A-5.   A greater deflection angle.
A-6.   A greater deflection angle.
A-7.   Higher potential.
A-8.   Slower beam.
A-9.   Amplitude and time.
A-10.   Amplitude.
A-11.   Time and/or frequency relationships.


A-12.   To permit wide-angle deflection of the beam.
A-13.   Deflection factor.
A-14.   A CRT, a group of control circuits, power supply, sweep circuitry, and deflection circuitry.
A-15.   Lower.
A-16.   Amplitude, phase, time, and frequency.
A-17.   Dual-trace oscilloscopes.
A-18.   Front end.


Introduction to Matter, Energy, and Direct Current, Introduction to Alternating Current and Transformers, Introduction to Circuit Protection, Control, and Measurement, Introduction to Electrical Conductors, Wiring Techniques, and Schematic Reading, Introduction to Generators and Motors, Introduction to Electronic Emission, Tubes, and Power Supplies, Introduction to Solid-State Devices and Power Supplies, Introduction to Amplifiers, Introduction to Wave-Generation and Wave-Shaping Circuits, Introduction to Wave Propagation, Transmission Lines, and Antennas, Microwave Principles, Modulation Principles, Introduction to Number Systems and Logic Circuits, Introduction to Microelectronics, Principles of Synchros, Servos, and Gyros, Introduction to Test Equipment, Radio-Frequency Communications Principles, Radar Principles, The Technician's Handbook, Master Glossary, Test Methods and Practices, Introduction to Digital Computers, Magnetic Recording, Introduction to Fiber Optics
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