Options —465B Service
Option 04
OPTION
04
EMC ENVIRONMENTAL
INTRODUCTION
This section describes
the
features of
Option 04
applicable
to the 465B Oscilloscope. Circuitry in the
instrument
is modified to meet additional conducted and
radiated interference requirements over the frequency
range of 150 kHz to
25
MHz (conducted) and
150
kHz to
1
GHz
(radiated)
The following changes are made to the standard
instrument circuitry to meet the additional specification
requirements.
Figure
6-1
reflectsthe Option 04 instrument
configuration
EMI filter FL14500 is added in series
with the input
power cord
A cathode-ray tube
mesh filter
is
installed to minimize
crt faceplate radiation
Four signal-output bnc connectors on
the rear plenum
chamber are changed to a type
that improves shielding of
the
connected signal leads
Capacitors are added across the
transformer secon-
dary windings
Figure 6-1.
465B
Option
04
primary winding
with power-line filter.
REV A SEP 1979
63
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