Boonton Electronic 4500A Analyzer
Fabricante:
Modelo:
4500A
Fecha:
1997
Categoría:
Grupo:
Descripción:
RF PEAK POWER METER ANALYZER

Información

The Model 4500A RF Peak Power Meter Analyzer and the Model 4400A Peak Power Meter are new generation RF power meters. These instruments, when operated with 56000 series power sensors, comprise the most versatile power measuring systems available, with capability to make over 25 different measurements on captured signals. The instruments can measure the peak and average power of signals in the frequency range of 30 MHz to 40 GHz with a dynamic range of over 60 dB. The two models provide performance which previously required multiple instruments, and they provide that performance faster, with increased accuracy; while adding functionality not previously available. The speed is visible during the screen update process, waveform response rate and the IEEE-488 performance. The Model 4400A and Model 4500A are the fastest power meters available with the ability to talk two marker measurements over eighty times a second. The Model 4400A has two measurement modes - pulse power and CW power. The Model 4500A adds to these a third mode - statistical power. Each mode is targeted towards a specific type of measurement. In the pulse power mode the instrument functions as an enhanced peak power meter. It can be configured as a single or dual channel instrument. This mode provides the functionality of an random repetitive sampling Oscilloscope for viewing the RF envelope of signals in the frequency range of 30 MHz to 40 GHz. Its accuracy approaches that of average power meters, but with the ability to capture power versus time data. With the requirement of an internal or external trigger event it can automatically measure up to 14 characteristics of the RF envelope. These are peak power, average power, pulse width, risetime, falltime, overshoot, pulse period, pulse repetition rate, duty cycle, top amplitude, bottom amplitude, offtime, and the delay between two RF pulses or an RF pulse with an external trigger signal. In addition to the automatic measurements, the instrument offers a powerful set of marker measurements which includes the ability to make marker measurements at full accuracy, independent of vertical scale or offset. This is possible because of the use of logarithmic amplifiers, and a 12 bit analog to digital converter, which provide rangeless operation. In addition, the markers can be used to define regions of the waveform for analysis. This analysis includes average power of a portion of the waveform, minimum power, and maximum power. In the CW mode the instrument’s low end performance is improved by approximately 10 dB, which provides a signal measurement range of up to 70 dB (-50 to +20 dBm). This is accomplished by automatically limiting the input bandwidth of the instrument and using a second, low bandwidth internal measurement channel. In the statistical mode the Model 4500A offers many new features. This mode does not require a trigger event to make measurements like the pulse power mode. The instrument continuously samples the RF signal at approximately half a million samples per second, without discarding or losing any data. All of this data can be processed statistically to determine peak power, average power, minimum power, peak to average power ratio, and dynamic range, while reporting the sampling time, total samples captured and the statistical tolerance of the data. In addition, this data can be displayed using three different graphical representations. These are probability density function (PDF), cumulative distribution function (CDF), and one minus cumulative distribution function (1-CDF). This mode is very useful in applications where the signal is random in nature; such as digital communication and multiple carrier systems. Software Programmable A dedicated microprocessor performs random repetitive sampling, shaping, filtering, calibration, offset compensation, and conversion of the RF signal. The control Software is stored in EEPROM and is updated, as necessary, by loading upgrade Software from a standard DOS 3.5" diskette. Software can be loaded in the field by inserting the diskette in the front panel disk drive and turning the instrument on. There is no need to remove the cover or change parts. Auto-Setup The instrument will automatically select a vertical scale, vertical offset, timebase, holdoff and trigger level to display at least one pulse period at full amplitude of the full waveform. Menu-Driven Operation Setup and control of the instrument is menu-driven to simplify operation. User-selected parameters appear in a menu to the right of the waveform, together with applicable variables. Selections are arranged opposite adjacent “softkeys” that select parameters and activate data entry controls. Required numerical values are entered through the keypad, arrow keys or spin knob. Help Displays Context-sensitive HELP screens are accessible at the touch of a key for all function menus. The HELP information guides the user step-by-step to assure accurate instrument setup. High-Resolution Color Waveforms, control menus, measurement values and related text Display are displayed on a 7-inch diagonal, 640 x 480 pixel, VGA color CRT. Display element colors are user-selectable to maximize clarity. Dual Independent When equipped with the optional second measurement channel, the Channels instrument can display two pulsed signals or a pulsed signal on one channel and a trigger waveform on the other. Each channel is calibrated and all channel parameters are channel-independent. Balanced Diode The balanced diode sensor configuration provides high sensitivity and Sensors even-order harmonic suppression. Low VSWR minimizes mismatch errors. Frequency Calibration factors traceable to NIST standards are stored in on-board EEPROMs and downloaded to the instrument. A thermistor in each sensor tracks temperature variations. Waveform Persistence The waveform display can be placed in the infinite persistence mode. Built-In Precision A 1 GHz Calibrator, traceable to NIST, enhances measurement relia- Calibrator bility. The user-selectable automatic calibration routine calibrates the sensor and instrument in steps over the full dynamic range. Adjustable Averaging Random repetitive sampling and averaging with an exponential Filter (performed on each point of the waveform) reduce noise contribution and provide accurate, stable measurements. The number of repetitions to be averaged can be adjusted to the smallest value that achieves the desired noise suppression, thereby avoiding excessive averaging delays. Automatic Waveform The instrument can measure fourteen pulse parameters related to power, Analysis time and/or frequency. All programmed measurements are made automatically and displayed in text mode. Measurement information is available directly, eliminating the need for interpretation by the user. Single-Shot The 1 MHz sampling rate yields a 100 kHz single-shot bandwidth Measurements (10 samples per pulse) for capturing and analyzing infrequent events. Disk Drive The disk drive uses a 1.44MB DOS compatible 3.5 inch diskette. The instrument can store its setup configuration, reference waveforms, screen printouts, or screen plots to the disk. The instrument setups are stored as ASCII files that use the IEEE-488 bus commands. The waveform can be recalled into a reference channel and used for channel math or marker measurements. The print or plot files can be read by a PC and output to a device connected to the computer. Hard Copy Output A permanent copy of the instrument’s screen can be spooled to a plotter or printer. The output can be sent to the serial, parallel or IEEE-488 ports or to disk. Self-Test and An automatic self-diagnostic routine can be initiated at any time to Diagnostics isolate and identify a faulty module. Error reports direct the user to the instrument module or sensor that requires replacement. IEEE-488 Bus Control All instrument functions except power on/off can be controlled remotely via the parallel IEEE-488 bus Interface. Setup of interface parameters is menu driven; front panel indicators keep the user informed of bus activity. Stored Configurations For applications in which the same instrument configurations are used repetitively, up to ten complete setups can be stored and recalled at the touch of a key.

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Manual del usuario
Type manuel:
Manual del usuario
Páginas:
265
Tamaño:
3.24 Mbytes (3399526 Bytes)
Idioma:
english
Revisión:
Manuel-ID:
P/N 98404700A
Fecha:
1997 09 01
Formato:
Documento electrónico, sin análisis, muy bien legible.
Fecha de subida:
2017 01 22
MD5:
c8613de7a7d2cf2ed9a9a81ed0151e50
Descargas:
1184

Información

The manual is organized into seven sections and three Appendices, as follows: Section 1 - General Information presents summary descriptions of the instrument and its principal features, Accessories and options. Also included are specifications for the instrument and the 56000 Series sensors. Section 2 - Installation provides instructions for unpacking the instrument, setting it up for operation, connecting power and signal cables, and initial power-up. Section 3 - Getting Started describes the controls and indicators and the initialization of operating parameters. Several practice exercises are provided to familiarize you with essential setup and control procedures. Section 4 - Operation describes the display menus and procedures for operating the instrument locally from the front panel. Section 5 - Remote Operation explains the command set and procedures for operating the instrument remotely over an IEEE-488 bus. Section 6 - Application Notes describes automatic measurement procedures and presents an analysis of measurment accuracy. Definitions are provided for key terms used in this manual and on the screen displays. Section 7 - Maintenance includes procedures for installing Software and verifying fault-free operation. Appendix A - Error Messages defines the messages that are displayed when errors occur. Appendix B - Plotter Operation describes how to record the Model 4400A 4500A/output on a plotter or printer. Appendix C - Warranty and Repair Policy states the policies governing the return and replacement of modules and instruments during and after the warranty period. Appendix D - Sensor Performance Specifications Appendix E - End User License Agreement

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