Manual

ANSI C63.17-2006
Methods of Measurement of the Electromagnetic and Operational Compatibility of UPCS Devices
This standard describes preferred test methods, test facilities and, in some cases, alternative test methods
and facilities. If these methods and facilities do not apply to the equipment under test (EUT), the
manufacturer must explain why and must provide an alternative test procedure that has been approved by
the applicable regulatory agency. If alternative test methods or facilities are employed, every effort should
be made to establish correlation with the preferred ones.
Where the word shall is used in this document, it indicates something that is mandatory for compliance
with this standard. The word should indicates something that is advisory only.
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Roadmap to the document
The tests for UPCS devices fall into two categories. The first category includes the traditional set of radio-
frequency (RF) measurements of radiated power, emission mask, power spectral density (PSD), etc. These
tests are given in Clause 6 of this standard. The second category includes tests for the channel monitoring
and access requirements unique to UPCS devices. These requirements are sometimes collectively referred
to as the spectrum etiquette. The associated tests are described in Clause 7 and Clause 8 of this standard,
and relate to 47CFR15.323. Section 15.323 of Title 47 of the Code of Federal Regulations requires that a
UPCS device (the EUT) monitor the received RF power level on the intended transmit channel
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before
transmitting, and it also provides criteria that the monitored power level must satisfy to allow the EUT to
transmit on that channel. The tests in Clause 7 and Clause 8 are designed to verify compliance with these
requirements. Annex A provides a table showing the sections in 47CFR15 that correspond to the tests in
this document.
To test for compliance with the monitoring and access requirements, it is necessary to subject the EUT to
deliberate interference with controlled spectral and temporal characteristics on a selected channel or
channels, and observe the reaction of the EUT. To restrict operation of the EUT to the selected channel(s),
interference or administrative commands are used to block the other channels.
Clause 6, Clause 7, and Clause 8 give the fundamental tests. Clause 4 discusses test methodology for both
radiated and conducted RF emission, monitoring, and access tests. Radiated tests measure field strength to
determine the effective isotropic radiated power (EIRP), power density, and out-of-band emissions
(Clause 6). For the monitoring and access tests of Clause 7 and Clause 8, a calibrated field strength is
applied to the EUT if radiated measurements are used. If all EUT antennas are detachable, the tests of
Clause 6, Clause 7, and Clause 8 shall be done on a conducted basis; that is, RF connections can be made
between the EUT, its companion device, and the RF measuring instrument and interference generators via
shielded coaxial cable. There must be adequate shielding around the EUT (and possibly the companion
device) to prevent unintended RF coupling.
Clause 5 provides guidance on selection of measurement instrumentation, and Clause 9 summarizes the
information that should be provided in the test report.
Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments or corrigenda) applies.
ANSI C63.4-2003, American National Standard for Methods of Measurement of Radio-Noise Emissions
from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz.
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“Channel” is used here to denote a time/spectrum window.
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