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
If the transmit and monitoring antennas can be separated from each other by a maximum distance s, it is
suggested that the power T
M
at the EUT transmit antenna terminals be established only for one point at
distance r between the reference antenna and the EUT in the direction of EUT transmit antenna maximum
radiation, by applying corresponding power P
Tref
at the terminals of a reference antenna. Then, while the
position of the reference antenna is not changed, the monitoring antenna is placed at a distance r + s from
the reference antenna, and is positioned in multiple orientations. If the EUT fails to defer in any orientation,
the reference antenna should be rotated 90° about the direction to the EUT. Only if the EUT again fails to
defer should it be held noncompliant.
B.3.2
B.3.3
Nondetachable transmit and monitoring antennas
When access to the EUT antenna terminals is not available [antennas are nondetachable and no provisions
have been made in the test samples for a matched connection made in place of the antenna(s)], only
radiated measurements are possible, and tests for compliance with the rules must be based on
measurements of EIRP and the response of the EUT to the applied field strength. Procedures to determine
the gain G
A
of detachable antennas based on power comparison at the antenna terminals are not applicable.
Several alternative test techniques are possible based on measurements of radiated field intensities and/or
antenna-related parameters. The relationships given in B.3.3 allow the EIRP and the applied field strength
threshold to be determined in the free-space environment with a reference antenna, which is first used to
measure the radiated field strength from the EUT and then used to generate a field incident at the EUT.
Relationships for radiated measurement of EIRP
In a free-space environment, the radiated field intensity is related to the transmitted power at the antenna
terminals, shown in the following equation:
),(30
1
),(
φθφθ
PG
r
E =
V/m
(B.2)
where
P is the power (in watts) applied to the EUT antenna terminals
r is the distance in meters from the antenna to the observation point
G(θ,φ) is the directive gain of the transmit antenna in the (θ,φ) direction.
Converting to logarithmic units and considering the direction (θ,φ) in which the EUT antenna gain achieves
its maximum value G
A,
given in the following equation:
,8.104log20
10EUTmax,EUT
+−+= rGPE
A
dBµV/m
(B.3)
A
GP +=
EUTEUT
EIRP
(B.4)
where
G
A
(dBi) is the maximum directive antenna gain of the EUT
P
EUT
is in dBm
From Equation (B.3) and Equation (B.4), the EIRP is related to the measured field by the following
equation:
EIRP E r
EUT EUT
=+−
max
log . .20 104 8
10
(B.5)
53
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