The Model 851B is the Display Section of the
Hewlett-Packard Spectrum Analyzer; the RF Section
is the Model 8551. Together, the 851/8551 provide
an Analyzer which can display up to 2 Gc of spectrum.
Analyzer input range is from 10 Mc to 42 Gc, its
dynamic range is 60 db, its sensitivity is at least -65
dbm, its image separation is 4 Gc, and its functions
are calibrated. The RF Section, which is a receiver
that electronically scans the input signal, is described
in a separate Operating and Service Manual.
The 851B Display Section is an oscilloscope
with an unusually wide dynamic range. The display
is amplitude vs frequency, and range is such that a
fundamental and harmonics down as far as 60 db can
be viewed simultaneously. In addition to the features
offered by other good oscilloscopes - - features such
as calibrated sweep times, calibrated gain, choice of
synchronizing voltages, vertical and horizontal positioning,
focus adjustments, and intensity variation -the
851B provides additional facilities which widen
the scope of the Analyzer as an electronic tool.