Equipment information:

IFR A-7550 Spectrum analyzer
Manufacturer:
IFR
Model: A-7550
Date: 1985
Category: Measurement instruments
Group: Spectrum analyzer
Description:
Information:
                                    The A-7550 Spectrum Analyzer is a microprocessor-control1ed
} superheterodyne unit which offers ease of operation, while
including the most needed features of a spectrum analyzer.
1-2 STANDARD FEATURES
The A-7550 Spectrum Analyzer covers a range from 100 kHz to
999.9999 MHz at levels of up to +30 dBm. Signal levels may
be directly read on the CRT in either dBm* dByW, dBV, dBmV
or dByV. Signals can be stored, recalled, plotted or used
for comparison purposes. Standard A-7 5 5 0 input impedance
is 50Ω. All operating parameters are set via keyboard
o pera ti on .
1-2-1 DISPLAY METHOD
The A-7550 display is fully digitized. A VRS™ (Vertical
Raster Scan) method is used to form the display. The display
has'390 horizontal discrete points and 480 vertical discrete
points. Full scan range is from 0 Hz to 1 GHz.
Users familiar with other spectrum analyzers may be used to
seeing the zero hertz marker displayed anywhere on the
display. On the A-7550, the zero hertz marker does not move
to the right of the left edge of the display. The
microprocessor does not allow a setting that would
theoretically allow a "negative11 frequency to the left of
the zero hertz marker. The user should note this
characteristic when becoming familiar with the A-7550.

These manuals are available for the above equipment:

IFR -- A-7550 -- Service Manual
File name: IFR-5363-Manual-Page-1-Picture
Manual Type: Service Manual
Pages: 274
Size: 21.01 Mbytes (22031476 Bytes)
Language: english
Revision:
Manual-ID/Number: 1002-5301-100
Date: 1986
Quality: Scanned document, all readable.
Upload date:
MD5: 90f8d6fe0bd019e4be9c0c39dfb5bbd9
ed2kID: 515d5c1aacb9ca7a8a41ee241fd4ecdb
Downloads: 361 since 19 January 2014
Information:
This manual contains maintenance instructions for the A-7550
Spectrum Ana 1yzer. The i nformati on in this manua1 wi11
enable the techn i ci an to

1.	Service, test, repair or replace any major assembly or
modul within the test set.

2.	Maintain the operating condition of the set to expected
performance standards.

3.	Understand the principles of operation as they relate to
the overall operation of the set as well as to individual
circuits.

ORGANIZATION

This manual is divided into six major sections:

SECTION 1 - INTRODUCTION

Briefly describes the electrical and mechanical
configuration of the A-7550» intended to familiarize the
technician with the overall structure of the set.

SECTION 2 - THEORY OF OPERATION

Describes the A-7550 circuit theory on three levels of
complexity, a simplified overview, a functional theory of
interactive modules, and a detailed theory of each module.
Appropriate block diagrams accompany eachdiscussion.

SECTION 3 - PERFORMANCE EVALUATION

Contains "covers on" functional checkout procedures for
evaluating the performance of the A-7550 in each of its
modes of operation and major functions.

SECTION 4 - CALIBRATION

Contains step-by-step calibration procedures for use at
normal calibration intervals or after making repairs or
replacements.

SECTION 5 - TECHNICAL DATA

Contains component layout drawings for all mechanical
assemblies, PC Board assemblies, interconnect diagrams,
circuit schematics, waveforms and charts reflecting voltage
levels keyed to test points.
IFR-5363-Manual-Page-1-Picture
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IFR -- A-7550 -- User Manual
File name: IFR-6778-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 136
Size: 4.28 Mbytes (4483849 Bytes)
Language: english
Revision:
Manual-ID/Number: 1002-530 1-000
Date: 1988
Quality: Scanned document, all readable.
Upload date:
MD5: 796edd492b35ccdb2c30e8bdbe332420
ed2kID: b69b690a0de913f73021d0056333109f
Downloads: 68 since 25 May 2015
Information:
This manual contains instructions for operating the A-7550
Spectrum Analyzer. It is strongly recommended that the
operator be thoroughly familiar with Sections 1 through 3 of
this manual before attempting to operate the A-7550.
This revision of the A-75 5 0 Operation Manual includes
extensive modifications, which include Software Version 2.40
and 3.40. Versions 2.40 and 3.40 add the auto feature to the
Plotter Function and enhances Bandwidth Optimization.
ORGANIZATION
This Operation Manual is divided into the following major
sections: SECTION 1 - INTRODUCTION
Provides a brief introduction to the A-7550, including
standard and optional features.
SECTION 2 - INSTALLATION
Provides a step-by-step procedure for preparing the A-7550
for operation.
SECTION 3 - DESCRIPTION OF CONTROLS, CONNECTORS & INDICATORS
Identifies and functionally describes all A-7550 controls,
connectors and indicators.
SECTION 4 - MENU OPERATION
Provides a functional description of A-7550 menu operation
and a detailed description of each menu.
SECTION 5 - GPIB OPERATION
Provides instructions for A-7550/GPIB Interface.
SECTION 6 - RS-232 OPERATION
Provides instructions for A-7550/RS-232 Interface.
SECTION 7 - QUASI-PEAK OPERATION
Provides instructions for Quasi-Peak operation.
The Appendices of this manual contain A-7550 specifications,
and some procedures which are not required for all A-7550 users.
IFR-6778-Manual-Page-1-Picture
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