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Chapter 1
General Information
1-1
SCOPE OF MANUAL
This manual provides service information for all models of the Series
690XXB Synthesized CW Generator and the Series 691XXB Synthe-
sized Signal Generator. The service information includes replaceable
parts information, functional circuit descriptions, block diagrams, per-
formance verification tests, and procedures for calibration, trouble-
shooting, and assembly/subassembly removal and replacement.
(Throughout this manual, the term 690XXB/691XXB is used to refer
to the instrument.) Manual organization is shown in the table of con-
tents.
NOTE
Service information for the series 690XXB CW generators
and series 691XXB 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 690XXB/
691XXB Synthesized CW/Signal Generators, identification numbers,
related manuals, and options. Information is included concerning level
of maintenance, replaceable subassemblies and RF components, ex-
change 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 690XXB Synthesized CW Generator and the Series
691XXB Synthesized Signal Generator are microprocessor-based, syn-
thesized 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 690XXB/691XXB are fully controllable lo-
cally from the front panel or remotely (except for power on/standby)
via the IEEE-488 General Purpose Interface Bus (GPIB).
The Series 690XXB Synthesized CW Generator and the Series
691XXB Synthesized Signal Generator each presently consists of
seven models covering a variety of frequency ranges and power levels.
Table 1-1, on page 1-4, lists models, frequency ranges, and maximum
leveled output.
690XXB/691XXB MM
1-3
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