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Boonton Electronic 92BD Level Meter
Hersteller:
Boonton Electronic
Modell: 92BD
Datum: 1977
Kategorie: Messgeräte
Gruppe: Level Meter
Beschreibung: PROGRAMMABLE RF MILLIVOLTMETER
Informationen:

One of the Model 92 Series of RF Millivoltmeters, the Model 92BD provides digital readout of measurements from the low radio frequencies to the gigahertz region, over a voltage range of 200 pV to 3 volts. It is a programmable, solid-state instrument of high sensitivity and accuracy: The Model 92BD exhibits true rms response for input signals up to 30 millivolts, gradually approaching peak-to-peak above this level. The digital voltmeter, however, is calibrated in rms above this region. The instrument is characterized by high input impedance (see Figures 1 and 2) , excellent stability, and low noise. A small edgewise panel meter, calibrated in dBm, is included; this is necessary for zeroing the instrument (the digital display blanks out below 200 yV) , and will also serve for comparative measurements of acceptable accuracy. A binary coded decimal (BCD) output is provided at a rear connector, permitting the 92BD to be integrated in systems for driving printers, tape or card punches, data control units, and similar interfacing data equipment. As part of a system, the 92BD is also programmed and controlled externally as needed. 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 92BD offers a convenient and accurate means for making a wide variety of measurements. Typical uses of this instrument would include: In transistor testing the instrument may be used to measure (3, ffc, and Other transistor parameters. VSWR and return loss measurements 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 cutoff 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 parameters of rf filters. 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 92BD is available in several optional configurations with a basic accuracy of 1% rdg. + 1% fs. The standard features of the instrument are: Programmable (logic level). Measures from 200 mV to 3 V* from 10 kHz to 1.2 GHz. True rms response to 30 mV**. Convenient push-button ranging. BCD digital output plus dc analog output. High input resistance, low input capacitance. Overload protection to 400 Vdc, 10 Vac. VSWR less than 1.15 up to 1.2 Gf&. *To 300 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 warm-up (1 minute), long intervals between calibrations, Plug-In PC boards for ease in servicing, light weight, and Other advantages of solid-state design.

Folgende Handbücher sind hierfür verfügbar:

Dokumenttyp: Bedienungsanleitung Boonton-8499-Manual-Page-1-Picture
Seitenanzahl: 43
Dateigröße: 1.24 Mbytes (1297975 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer:
Datum: 01 Januar 1977
Qualität: Gescanntes Dokument, teilweise schwer oder teilweise nicht zu lesen.
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MD5: f9b6a0ffd0d5df6db6e2fd1994b4073d
Downloads: 113 seit dem 23 Januar 2017
Informationen:

I. GENERAL INFORMATION 1 1.1 GENERAL 1 1.2 EQUIPMENT DESCRIPTION 2 1.2.1 Wide Frequency Range 3 1.2.2 Wide Voltage Range 3 1.2.3 True RMS Response 1.2.4 Low Noise 4 1.2.5 Minimal Zero Adjustment 4 1.2.6 BCD Output 4 1.2.7 DC Analog Output ^ 5 ff + ■ .' * II. SPECIFICATIONS „ 5 III. OPERATION 11 3.1 INSTALLATION 11 3.1.1 Operating Controls and Indicators 11 3.2 OPERATING PROCEDURES 12 3.2.1 Initial Operating Procedure 12 CHAPTER PAGE OPERATING NOTES 13 3,3,1 Overload Limits 13 3.3.2 Connection for Measurements Below 100 MHz 13 3.3.3 Connection for Measurements Above 100 MHz 13 3.3.4 Low-Level Measurement 14 3.3.5 Over/Under Range Indication 14 3.3.6 Making the Zero Adjustment 16 3.3.7 Signal Overload on 1 mV Range 16 3.3.8 Temperature Effects 16 3.3.9 Hum, Noise, and Spurious Pickup 17 LINEAR DC OUTPUT 17 3.5 LOW-FREQUENCY MEASUREMENTS 17 3.6 CORRECTION CURVES FOR ACTUAL VOLTAGE vs. DC OUTPUT 17 3.7 CORRECTION CURVE FOR MODEL 91-8B 17 3.8 CORRECTION CURVE FOR MODEL 91-14A 17 IV. THEORY 20 4.1. GENERAL 20 4.1.1 RF Probe 20 4.1.2 Attenuator and Amplifiers 21 4.1.3 Synchronous Detector 21 4.1.4 Shaping Amplifier 22 4.1.5 Digital Control 22 4.1*6 Analog/Digital Converter 22 4.1.7 Chopper-Driver Circuits 22 4.1.8 Power supply 23 4.1.9 Programming 23 V. MAINTENANCE 23 5.1 PERIODIC CALIBRATION 23 / 5.2 PRECAUTIONS WHEN CHECKING CALIBRATION 24 5.3 CALIBRATION CHECK 24 5.4 CALIBRATION PROCEDURE 24 5.5 TROUBLESHOOTING PROCEDURE 27 5.5.1 Cover Removal 27 5.5.2 Chopper Replacement 27 5.5.3 Voltage and Resistance Tests 27 5.. 5.4 Test Points 27 5.5.5 Replacement of RF Probes 27 5.5.6 Probe Tests 27 VI. Interface INFORMATION 34 6-1 PROGRAMMING INPUTS 6.1.1 Input Characteristics 34 6.1.2 Input Pull-Up 35 6.1.3 Triggering 35 6.2- DATA OUTPUTS 35 6.2.1- Output Characteristics 36 6.2*2 Analog Output 36 6.3 WAVEFORMS 36 6.3-. 1- Encode Trigger 36 6.3.2 Data Output Timing 37 6.4 AUTORANGING CHARACTERISTICS 38 SCHEMATICS Endpapers Amplifier 830581 Sheet 1 of 3 Chopper Driver 830581 Sheet 3 of 3 Shaping Amplifier 830456 Sheet 3 of 3 Autorange / 830483 Digital Control 830581 Sheet 2 of 3 Counter Board 830546 Sheet 1 of 3 A/D Converter 830546 Sheet 3 of 3 Display Board 830546 Sheet 2 of 3 92-8A 830650 92-9A 830900

Boonton-8499-Manual-Page-1-Picture


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