Goto Section: 15.31 | 15.33 | Table of Contents
FCC 15.32
Revised as of December 4, 2012
Goto Year:2011 |
2013
§ 15.32 Test procedures for CPU boards and computer power supplies.
Power supplies and CPU boards used with personal computers and for
which separate authorizations are required to be obtained shall be
tested as follows:
(a) CPU boards shall be tested as follows:
(1) Testing for radiated emissions shall be performed with the CPU
board installed in a typical enclosure but with the enclosure's cover
removed so that the internal circuitry is exposed at the top and on at
least two sides. Additional components, including a power supply,
peripheral devices, and subassemblies, shall be added, as needed, to
result in a complete personal computer system. If the oscillator and
the microprocessor circuits are contained on separate circuit boards,
both boards, typical of the combination that would normally be
employed, must be used in the test. Testing shall be in accordance with
the procedures specified in § 15.31.
(i) Under these test conditions, the system under test shall not exceed
the radiated emission limits specified in § 15.109 by more than 6 dB.
Emissions greater than 6 dB that can be identified and documented to
originate from a component(s) other than the CPU board being tested,
may be dismissed.
(ii) Unless the test in paragraph (a)(1)(i) of this section
demonstrates compliance with the limits in § 15.109, a second test
shall be performed using the same configuration described above but
with the cover installed on the enclosure. Testing shall be in
accordance with the procedures specified in § 15.31. Under these test
conditions, the system under test shall not exceed the radiated
emission limits specified in § 15.109.
(2) In lieu of the procedure in (a)(1) of this section, CPU boards may
be tested to demonstrate compliance with the limits in § 15.109 using a
specified enclosure with the cover installed. Testing for radiated
emissions shall be performed with the CPU board installed in a typical
system configuration. Additional components, including a power supply,
peripheral devices, and subassemblies, shall be added, as needed, to
result in a complete personal computer system. If the oscillator and
the microprocessor circuits are contained on separate circuit boards,
both boards, typical of the combination that would normally be
employed, must be used in the test. Testing shall be in accordance with
the procedures specified in § 15.31. Under this procedure, CPU boards
that comply with the limits in § 15.109 must be marketed together with
the specific enclosure used for the test.
(3) The test demonstrating compliance with the AC power line conducted
limits specified in § 15.107 shall be performed in accordance with the
procedures specified in § 15.31 using an enclosure, peripherals, power
supply and subassemblies that are typical of the type with which the
CPU board under test would normally be employed.
(b) The power supply shall be tested installed in an enclosure that is
typical of the type within which it would normally be installed.
Additional components, including peripheral devices, a CPU board, and
subassemblies, shall be added, as needed, to result in a complete
personal computer system. Testing shall be in accordance with the
procedures specified in § 15.31 and must demonstrate compliance with
all of the standards contained in this part.
[ 61 FR 31048 , June 19, 1996, as amended at 62 FR 41881 , Aug. 4, 1997]
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Goto Section: 15.31 | 15.33
Goto Year: 2011 |
2013
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