Información del equipo:

General Radio Company 1602-B Medidor de nivel
Fabricante:
General Radio Company
Modelo: 1602-B
Fecha: 1964
Categoría: Los instrumentos de medición
Grupo: Medidor de nivel
Descripción: Admittance Meter
Información:
                                    The Type 1602-B U-H-F Admittance Meter is a simple, flexible
instrument for the measurement of admittance and impedance
over a wide frequency range. As a null instrument the U-H-F
Admittance Meter can be used to measure the conductance and
susceptance of an unknown circuit directly. It can also be
used as a comparator to indicate equality of one admittance
to another, or degree of departure of one from the other. As
a direct indicating device, in addition, it can be used to
determine the magnitude of the reflection coefficient on a
50-ohm coaxial line or the magnitude of an unknown impedance
from ratios of output voltages read on a meter.
When the admittance meter is used in conjunction with an
adjustable- length coaxial line having a uniform
characteristic impedance, such as the Type 874-LK20
Constant-lmpedance Adjustable Line, impedance and admittance
measurements can be simplified as the correction for the
length of transmission line between the unknown and the
instrument can be eliminated. Also when the admittance meter
is used with a wide-range balun of the proper type, such as
the Type 874-UB Balun, accurate measurements can be easily
made on balanced circuits over a wide frequency range.
The instrument is best suited to measurements on
coaxial-line circuits naving a 50-ohm characteristic
impedance, but, in addition, measurements can be made on
components or on coaxial-line circuits having characteristic
impedances different from 50 ohms. The nominal frequency
range of the instrument is from 40 to 1500 Me, but
measurements can be made at frequencies as low as 10 Me. For
admittance measurements using the null method, the magnitude
of the conductive component of the unknown admittance is
indicated directlv on a scale which 
...........
of the susceptive component is indicated on another scale
which is calibrated from -20 to 0 to +20 millimhos. A third
scale on the dial indicates the multiplier used which
applies to both other scales. The multiplying-factor scale
is calibrated from 1 to infinity. Therefore, theoretically,
the instrument can measure admittances from zero to
infinity; however, at either extreme the accuracy becomes
poor because the dials cannot be read or set accurately. The
instrument can also be used to advantage for matching a load
to a line, as the instrument can be set up to indicate a
matched condition when the output is zero; therefore, a
continuous iqdication of the quality of the match is
indicated by the output from the detector.

Estos manuales están disponibles para el equipo anterior:

General Radio Company -- 1602-B -- Servicio y Manual del usuario
Nombre del archivo: GR-8252-Manual-Page-1-Picture
Tipo de manual: Servicio y Manual del usuario
Páginas: 71
Tamaño: 6.68 Mbytes (7008976 Bytes)
Idioma Inglés
Revisión:
Manual-/ número de identificación: 1602-0110-H
Fecha: 01 enero 1964
Calidad: Documento Scaned, todo legible.
Fecha de carga:
MD5: f3a48261249729907c9fb66f9f2664e9
Descargas: 55 desde 30 diciembre 2016
Información:
SPECIFICATIONS
TABLE ^^^6nTENTS
FRONTISPIECE 1.0 DESCRIPTION
1.1 GENERAL DESCRIPTION 1
1.2
CIRCUIT.............................................................................................................2
1.3 CONTROLS AND
CONNECTIONS..........................................................4
1.4 ACCESSORIES SUPPLIED
..............................................................................7
2.0 OPERATION 7
2.1 GENERATOR AND
DETECTOR.................................................................7
2.2 R-F
LEAKAGE.......................................................................................................13
2.21 Sources of
Leakage....................................................................................13
2.22 Leakage
Checks...........................................................................................14
2.3 MEASUREMENTS ON COAXIAL CIRCUITS HAVING A 50-OHM
CHARACTERISTIC IMPEDANCE
............................................. 15
2.31 Admittance
Measurements................................................................
, 15
2.311
Method.......................................................................................................15
2.312 Line-Length Corrections for Admittance Measurements . . 16
2.3121 Use of the Type 874-LK20 Constant-lmpedance
Adjustable Line to Eliminate Line-Length Corrections 17
2.31211 Example of Admittance Measurement Using a Type
874-LK20 Adjustable
Line....................................................19
2.3122 Measurement of Impedance Using the Type 874-LK20
Constant-lmpedance Adjustable
Line.......................................20
2.31221 Example of Impedance Measurement Using a Type
874-LK20 Adjustable
Line....................................................90
2.3123 Line-Length Correction Using the Smith Chart ... 21
2.3124 Line-Length Corrections Using Transmission-Line
Equations...........................................................................................23
2.3125 Determination of Electrical Length of Line .... 23
2.3126 Effect of Line Loss on Line-Length Corrections ... 26
2.31261 Measurement of Line
Loss......................................................26
o 'jnz'i r~____.• r 1 . 1 __
i.juui v-orrecnon Tor Line
loss.......................................................................27
2.3127 Methods of Short- and Open-Circuiting a Line .... 29
2.32 Admittance to Impedance Conversion Using Smith Chart . . 30
2.321 Measurement of Resistive Component of High-G) Element 30
2.33 Standing-Wave Ratio and Reflection Coefficient
Measurements 32
2.331 VSWR Measurements Using the Null Method ..... 32
2.332 Direct Reflection Coefficient and VSWR Measurements . . 33
2.34 Impedance Matching to a 50-0hm
Line..............................................35
2.35 Admittance or Impedance
Comparison..............................................35
2.36 Measurement of Impedance Magnitude
Directly..........................36
GR-8252-Manual-Page-1-Picture
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