Introduction; Assemblies - HP 8340B Manual

Controller Section
Introduction
The controller assemblies perform all
digital data
transfer and control functions for instrument opera¬
tion. Interface circuitry
provides communication with the rest of
the instrument. Digital Information
is
exchanged between the instrument processor and other sections of the instrument on
a
bidirectional
data bus.
Rear panel interface signals (e.g. HP-IB,
sweep
output) are routed through or generated in the con¬
troller functional group. Sweep
control signals initiated by the
controller section start and stop the
sweep generator. Sweep events (e.g. bandcrossings, end of sweep, markers)
are monitored by the
controller section and specific instructions are executed according to
the type of sweep event.
ASSEMBLIES
The controller functional group consists of three assemblies:
•
A57 marker/bandcross assembly
•
A59 digital interface assembly
•
A60 instrument processor assembly
The A60 processor
will
operate
with the other two assemblies removed from the instrument.
HP 8340B/41B
Controller Section Introduction F-l