Section
1-7L12
SPECIFICATIONS
Introduction
Section
9,
Mechanical Parts List, Exploded drawings and
Accessories: Provides information necessary to order re-
This manual contains information required to operate,
test,
calibrate, and service the 7L12 Spectrum Analyzer. placeableparts. Part List is cross-referencedto the Electrical
The manual is divided intoten major sections; Parts List. Exploded drawing shows sequence of assembly
and identified assemblies.
Section 1, General lnformation and Specifications. Section 10, Manual Changes and Corrections: Provides
history and updating information for the manual in the
form of inserts. As the manual is updated these inserts are
Section 2, Operation Instructions: lnformation relative incorporated
into
the manual
text
anddiagrams.
to installing and operating the instrument.
Section 3, Performance Check: Provides a complete
procedure to check operational performance for an in-
coming acceptance check, or any additional performance
checks that require test equipment to verify instrument
specifications.
Section
4,
Calibration Procedure: Describes test equip-
.
.
ment setup and adjustment proceduresrequiredto align the
instruments internal adjustments.
Section
5,
Circuit Description: Provides basic and
general circuit analysis that may
be
useful when servicingor
operating the instrument.
Section
6,
Maintenance Instructions: Describes routine
and corrective maintenance procedures with detailed in-
structions for replacing assemblies, sub-assemblies, and
individual components. An exploded drawing is part of
section
9.
"'lrouble-shooting procedures plus general infor-
mation that may aid in servicing the instruments are also
provided.
Section 7, Electrical Parts List: Provides information
necessary to order replaceable parts and assemblies.
Section 8. Diagrams: Provides functional block diagram
and detailed circuit schematics. Pictoral layout drawings,
which show assembly, sub-assembly, and component loca-
tions are located adjacent to the diagram (usually on the
back of the preceding diagram page). Waveforms and
voltage data, for troubleshooting or circuit analysis, are also
provided adjacent to or on the diagram.
Description
'The 7L12 Spectrum Analyzer is
a
dual-width plug-in
unit, for the 7000-SeriesOscilloscopes. When used with any
of these oscilloscopes, it displays a spectrum of signal
energy within any frequency span to 1.8 GHz. The unit
contains horizontal sweep and timing circuits, for fre-
quency and time domain displays, and also means by which
an external sweep source can be applied to slave the 7L12
to external devices, such as arecorder.
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
The following characteristics and features of the 7L12
Spectrum Analyzer are applicable after a warmup period of
30 minutes or more.
Center Frequency Operating Range and Accuracy
From 0.1 MHz to 1.8 GHz. Readout accuracy is within
*
(10MHz
+
1% of the dial readout).
Frequency Span
Calibrated steps, in 1-2-5sequence, from 500 Hz/Div to
100 MHzIDiv. Accuracy
is
within
5%
of the span selected
and linearity
is
within 5%, over the center 8 divisions of a
10 division display.
Two additional positions MAX SPAN and 0 provide
approximately 1.8 GHz (180 MHz/Div) of span, or fixed
frequency operation, for time domain display. Span
is
continuously variable betweensteps.
