TM 11-6625-2735-14-1
OPTION 04
This section describes the features of Option 04 as it
Cathode ray tube mesh filter installed to minimize crt
pertains to the 475 Oacilloscope. This circuitry modifies
faceplate radiation.
the instrument to meet conducted and radiated in-
terference requirements over the frequency range of
150 kHz to 25 MHz (conducted) and 150 kHz to 1 GHz
(radiated).
Four signal-output bnc connectors on the rear
plenum chamber changed to a type that improves
shielding of the connected signal leads.
The following additions and changes were made to the
standard circuitry to meet the specification requirements:
EMI filter (FL1401) added in series with the input
Capacitor added across the transformer secondary
power cord.
windings.
Fig. 6-1. Option 04 schemetic diagram.
(FO's 1 through 14 are located
in Back of Manual)
6-2
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