Geräte Informationen

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:

Boonton Electronic -- 92BD -- Bedienungsanleitung
Dateiname: Boonton-8499-Manual-Page-1-Picture
Dokumenttyp: Bedienungsanleitung
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.
Upload Datum:
MD5: f9b6a0ffd0d5df6db6e2fd1994b4073d
Downloads: 27 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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