Manual
Table Of Contents
- ANSI C63.17-2006 Front Cover
- Title page
- Introduction
- Notice to users
- Participants
- Contents
- American National Standard Methods of Measurement of the Electromagnetic and Operational Compatibility of Unlicensed Personal Communications Services (UPCS) Devices
- 1. Overview
- 2. Normative references
- 3. Definitions, symbols, acronyms, and abbreviations
- 4. Radiated and conducted emissions test methodology
- 4.1 Test facilities and equipment
- 4.2 Test configurations and setup
- 4.3 Transmitted power and monitoring threshold limits
- 4.4 Limits for radiated and conducted tests
- 4.5 Conducted measurements of products with identical collocated transmitting and monitoring antennas
- 4.6 Conducted measurements of products with collocated transmitting and monitoring antennas of different types
- 4.7 Conducted measurements of products with arbitrarily placed transmitting and monitoring antennas
- 4.8 Radiated measurements of products with identical collocated transmitting and monitoring antennas
- 4.9 Radiated measurements of products with collocated transmitting and monitoring antennas of different types
- 4.10 Radiated measurements of products with arbitrarily placed transmitting and monitoring antennas
- 4.11 Manufacturer’s declarations and descriptions
- 5. Measurement instrumentation
- 6. RF measurements
- 7. Monitoring tests
- 8. Time and spectrum window access procedure
- 9. Test report
- 9.1 Test report contents
- 9.2 Applicable standards
- 9.3 Equipment units tested
- 9.4 Test configuration
- 9.5 List of test equipment
- 9.6 Units of measurement
- 9.7 Location of test site
- 9.8 Measurement procedures
- 9.9 Reporting measurement data
- 9.10 General and special conditions
- 9.11 Summary of results
- 9.12 Required signatures
- 9.13 Test report appendixes
- 9.14 Test report disposition
- Annex A (informative) 47CFR15, Subpart D—Rules and test cases for UPCS devices
- Annex B (informative) Radiated and conducted measurement of power output and monitoring thresholds
- Annex C (informative) Options for implementing the tests of Clause 7 and Clause 8
ANSI C63.17-2006
Methods of Measurement of the Electromagnetic and Operational Compatibility of UPCS Devices
Record the maximum level of the modulated carrier. Find the two furthest frequencies above and below the
frequency of the maximum level of the modulated carrier where the signal level is 26 dB below the peak
level of the carrier. The difference in frequency between these two frequencies is the emission bandwidth.
If, after measuring the emission bandwidth, it is found that the RBW used was not approximately 1% of the
emission bandwidth, then adjust the RBW and repeat the procedure until the correct RBW is used. If the
spectrum analyzer has fixed values of RBW, the one that is the nearest to 1% of the emission bandwidth is
acceptable, provided it is no less than 0.5% of the emission bandwidth and no greater than 2% of the
emission bandwidth.
Record the frequency of the maximum level of the modulated carrier and the furthest frequencies above
and below this frequency where the signal levels are 6 dB and 12 dB below the peak level of the modulated
carrier. These frequency pairs are to be used later in 7.4 for measuring monitoring bandwidth.
The measured B shall be less than B
limitU
, or the EUT fails.
The measured B shall be greater than B
limitL
, or the EUT fails.
6.1.4
6.1.5
Table 4
Modulation
Attestation of compliance with the digital modulation requirement will be made in accordance with the
disclosure statement required by the applicable equipment authorization procedures (see, e.g., 47CFR2).
Power spectral density PSD
EUT
using the measured maximum method
The following test method may be used to verify that the EUT’s PSD does not exceed the permitted value
in any 3 kHz bandwidth.
The EUT transmit data sequence and mode of operation shall be representative of that encountered in
normal operation, so that transient effects associated with transmission bursts or data content are captured
by the PSD measurement. The equipment is configured as shown in Figure 3 and according to Table 4.
—Spectrum analyzer settings for finding of the maximum of PSD
EUT
RBW 3 kHz
Video bandwidth ≥ 3 × RBW
Span
Zero span at frequency with the maximum level (frequency determined
in 6.1.3 if the same type of signal (continuous versus burst) was used
in 6.1.3)
Center frequency Spectral peak as determined in 6.1.3
Sweep time
For burst signals, sufficient to include essentially all of the maximum
length burst at the output of a 3 kHz filter (e.g., maximum input burst
duration plus 600 µs). For continuous signals, 20 ms.
Amplitude scale Log power
Detection Sample detection and averaged for a minimum of 100 sweeps
Trigger External or internal
For burst-type signals, arrange to measure the wideband burst duration of each burst analyzed and compute
the mean duration.
Determine the level that is 20 dB below the first peak. Record the power-averaged waveform between the
20 dB threshold levels around the first peak with at least 30 000 samples per second as shown in Figure 4.
Multiple wideband bursts may produce the waveform between −20 dB peaks; these must be included in the
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