Chapter 1General Information
1-1 SCOPE OF MANUAL This manual provides service information for all models of the Series
682XXB/683XXB Synthesized Signal Generators. The service informa-
tion includes replaceable parts information, functional circuit descrip-
tions, block diagrams, performance verification tests, and procedures
for calibration, troubleshooting, and assembly/subassembly removal
and replacement. (Throughout this manual, the terms 682XXB/
683XXB and signal generator will be used interchangeably to refer to
the instrument.) Manual organization is shown in the table of con-
tents.
NOTE
Service information for the series 682XXB signal generators
and series 683XXB signal generators is combined into one
manual because identical model numbers of each series con-
tain the same assemblies, subassemblies, and components.
Differences between the series are noted where applicable
throughout the manual.
1-2 INTRODUCTION This chapter provides a general description of the Series 682XXB/
683XXB Synthesized Signal Generators, identification numbers,
related manuals, and options. Information is included concerning level
of maintenance, replaceable subassemblies and RF components,
exchange assembly program, and preventive maintenance. Static-
sensitive component handling precautions and lists of exchangeable
subassemblies and recommended test equipment are also provided.
1-3 DESCRIPTION The Series 682XXB Synthesized Signal Generator and the Series
683XXB Synthesized Signal Generator are microprocessor-based,
synthesized signal sources with high resolution phase-lock capability.
They generate both discrete CW frequencies and broad (full range)
and narrow band sweeps across the frequency range of 10 MHz to
65 GHz. All functions of the signal generators are fully controllable
locally from the front panel or remotely (except for power on/standby)
via the IEEE-488 General Purpose Interface Bus (GPIB).
The Series 682XXB Synthesized Signal Generator and the Series
683XXB Synthesized Signal Generator each presently consists of 15
models covering a variety of frequency ranges and power levels. Table
1-1, pages 1-4 and 1-5, lists models, frequency ranges, and maximum
leveled output.

682XXB/683XXB MM 1-3