Boonton Electronic 92B Измеритель уровня
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Модель:
92B
Дата:
1980
Категория:
Группа:
Описание:
Millivoltmeter
Информация
The Model 92 Series RF Millivoltmeter provides an accurate
readout of measurements from the low radio frequencies to
the gigahertz region, over a voltage range of 200 uV to 3 volts.
It is a programmable, solid-state instrument of high
sensitivity and accuracy, characterized by high input
impedance (see Figures 1 and 2), excellent stability, and
low noise.
The Model 92 exhibits true rms response for input signals up
to 30 millivolts, gradually approaching peak-to-peak above
this level. The meter, however, is calibrated to indicate
rms of a sine wave above 30 mV.
Input and output connections for external control and
readout are provided by a 22-pin card-edqe connector at the
rear of the instrument. ■
A linear dc output, whose level is proportional to the rf
input voltage, is also provided at a rear connector. This
may be used to drive a recorder, remote indicator, or other
analog
devices.
The 92 offers a convenient and accurate means for making a
wide variety of measurements. Typical uses of this
instrument include:
In transistor testing the instrument may be used to measure
6, f , and other transistor
parameter s.
SWR and return loss measurement using the Model 92 Series
with bridge methods, directional couplers, and adjustable or
slotted lines.
Gain and loss measurements in wide-band amplifiers,
including such design characteristics as stage gain,
flatness of the pass band, upper cut-off or corner
frequency, negative feedback factors, and other parameters.
Proper adjustment of tuned circuits in narrow-band amplifiers.
The adjustment, measurement of performance, and evaluation
of rf Filter parameters.
Measurement of vswr or return loss and attenuation of rf
attenuators.
Measurement of output levels of signal generators,
adjustment of baluns, harmonic distortion of rf signals, and
adjustment of circuits for minimum voltage (null) or maximum
voltage (peak).
The Model 92 is available in several optional configurations
with a basic accuracy of 1% rdq. + 1% fs. The standard
features of the instrument are;
Remote programmability.
Measures from 200 yV to 3V* from 10 kHz to 1.2 GHz.
True rms response to 30 mV**.
Convenient pushbutton ranging.
DC analog output.
Hiqh input resistance, low input capacitance.
Overload protection to 400 Vdc and 10 Vac.
SWR less than 1.2 up to 1.2 GHz.
*To 30f) V, up to 700 MHz, with accessory 100:1 divider.
**To 3 V, up to 700 MHz, with accessory 100:1 divider.
The characteristics of the instrument include: high
reliability, fast warmup (1 minute typical), long intervals
between calibrations, Plug-In PC boards for ease in
servicing or modifying, light weight, and other advantages
of solid state design.
Hасто́льная кни́га тип:
Обслуживание и Руководство пользователя
Страницы:
51
Размер:
2.95 Mbytes (3093334 Bytes)
Язык:
english
Пересмотр:
Hасто́льная кни́га ID:
Дата:
1980 12 01
Качество:
Сканированный документ, читая частично плохо, частично не читается.
Дата загрузки:
2017 01 23
MD5:
fcced6b49bc4930fa7a9dcc821ed4817
Загрузки:
543
Информация
INTRODUCTION
1.1 GENERAL
1.2 EQUIPMENT DESCRIPTION
1.2.1 Frequency Capability
1.2.2 Voltage Capability
1.2.3 True RMS Response
1.2.4 Low Noise
1.2.5 Minimal Zero Adjustment
1.2.6 DC Output
SPECIFICATIONS
OPERATION
3.1 INSTALLATION
3.1.1 Operating Controls and Indicators
3.2 OPERATING PROCEDURES
3.2.1 Initial Operating Procedure
3.3 OPERATING NOTES
3.3.1 Overload Limits
3.3.2 Connection for Measurements Below 100 MHz
3.3.3 Connection for Measurements Above 100 MHz
3.3.4 Low-Level Measurement
3.3.5 Making the Zero Adjustment
3.3.6 Signal Overload on 1 mV Range
3.3.7 Temperature Effects
3.3.8 Hum, Noise, and Spurious Pickup
3.4 DC OUTPUT
3.5 LOW FREQUENCY MEASUREMENTS
3.6 CORRECTION CURVE FOR MODEL 91-8B, 50 OHM ADAPTER
3.7 CORRECTION CURVE FOR MODEL 91-14A, 50 OHM TEE ADAPTER
THEORY OF OPERATION
4.1 GENERAL
4.1.1 RF Probe
4.1.2 Attenuator and Amplifiers
4.1.3 Synchronous Detector 20
4.1.4 Shaping Amplifier 21
4.1.5 Chopper-Driver Circuits 21
4.1.6 Power supply 21
4.1.7 Proyramming 21
V MAINTENANCE 22
5.1 PERIODIC CALIBRATION 22
5.2 PRECAUTIONS WHEN CHECKING CALIBRATION 22 5.J CALIBRATION
CHECK 2 3
5.4 CALIBRATION PROCEDURE 2 3
5.5 TROUBLESHOOTING PROCEDURE 25
5.5.1 Cover Removal 2 5
5.5.2 Chopper Replacement 25
5.5.3 Voltaqe and Resistance Tests 25
5.5.4 Test Points 26
5.5.5 Replacement of RF Probes 26
5.5.6 Probe Tests 26
VI Interface 32
6.1 INPUT CHARACTERISTICS 32
6.2 INPUT PULL-UP 3 3
6.3 ANALOG OUTPUT 3 3