Download Wording for TIA-1083

TR41.3.9-08-02-004-M
Wording for TIA-1083-1 Addendum. SP-3-0219-AD1
Project Title: Telecommunications - Telephone Terminal Equipment - Handset Magnetic
Measurement Procedures and Performance Requirements Addendum 1
Project Number(PN): SP-3-0219-AD1
Introduction
TIA-1083 specifies testing methods and performance requirements for a handset’s magnetic
output signal for wireline telephones. The performance requirements specified in TIA-1083 are
applicable to wireline telephones with either analog or digital interfaces. However the published
document only includes testing methods for telephones with an analog interface. To address the
need for testing methods related to TIA-1083 for telephones with a digital interface, TIA TR-41.3
developed this addendum.
Scope:
This addendum to TIA-1083 addresses the performance requirements and testing methods for a
handset’s magnetic output signal for wireline telephones with a digital interface. This does not
include telephones with a cellular interface. The digital interfaces addressed include TDM-based,
packet-based, Local or Wide Area Networks, Firewire/IEEE1394, Universal Serial Bus (USB),
ISDN, and digital over twisted pair wire. This includes corded and cordless telephones.
Examples include, but are not limited to: ISDN telephones, digital proprietary telephones, VoIP
telephones, softphones (such as a laptop computers), Wi-Fi telephones, USB telephones, DECT
telephones, and Bluetooth® telephones.
@@@ Look into other changes to clarify that TIA-1083 applies to both corded and
cordless handsets.
Change the following clause:
3.2.2 Method of Measurement
To: 3.2.2 Method of Measurement for Telephones With an Analog Interface
TR41.3.9-08-02-004-M
Add the following figure 8:
Signal
Generator
Telephone
Interface
See Figure 7
Audio
Power Amp
UUT
Base Unit
UUT Handset
HAC Probe
FFT
Analyzer
Preamp
@@@
 Delete the audio power amp block and re-label the telephone interface block as
“Appropriate Communication Interface for telephone under test”.
 Add a broken line between the base and handset to indicate a possible corded
phone.
 Re-label the HAC Probe block to “ear simulator”.
 Re-label the FFT analyzer to “audio signal analyzer”.
 Mention that it could be direct digital generation.
TR41.3.9-08-02-004-M
Add the following figure 9:
Signal
Generator
Telephone
Interface
See Figure 7
Audio
Power Amp
UUT
Base Unit
UUT Handset
HAC Probe
FFT
Analyzer
Preamp
@@@ Delete the audio power amp block and remove the figure reference in the
telephone interface block. Add a broken line between the base and handset to indicate a
possible corded phone.
Add the following clause:
3.2.3 Method of Measurement for Telephones With Digital Interface
1. Determine the appropriate input test level that produces an equivalent acoustic
level to analog sets (nominal +0 dBPa) with the receive volume control set to its
nominal gain level. 810B
a) Connect the telephone under test as shown in Figure 8.
b) Place the handset receiver on the artificial ear using the high leak
condition specified in TIA-810-B clause 4.4 & 4.7 & 4.8.
c) determine the volume control setting for nominal gain per TIA-810-B
clause 4.6 except use the high leak position.
d) Apply a 1000 Hz input signal and determine the sound pressure produced
in the artificial ear. Adjust the input level to produce +0 dBPa at 1000 Hz.
Use the input level thus determined for the below magnetic field
measurement.
TR41.3.9-08-02-004-M
2. Configure the UUT and test equipment as shown in Figure 9, with the handset within
2 meters of the base for the Near Range Mode if it is cordless.
3. Place the UUT off-hook and adjust its volume control to the first volume control
setting to be tested.
4. Apply the 1 kHz signal determined in step 1. Locate the Perpendicular Measurement
Position with the strongest magnetic field intensity (in response to the 1 kHz applied
signal) by scanning the handset earpiece with the Axial Probe. The Perpendicular
Measurement Position shall be restricted to an area in the measurement plane and (see
Error! Reference source not found.):

Between 10 mm beyond the top of the handset housing and 10 mm toward the
microphone end of the handset from the reference axis
 Within the width of the handset.
All of the following measurements shall be made at the same measurement position.
5. Measure the Perpendicular Field Intensity at 1 kHz:
a) Measure the probe coil electrical output in dBV.
b) Convert the probe voltage to magnetic field intensity units using the following
equation:
Hr(f) = Vp(f)-P(f)
where
Hr(f) is the receiver magnetic field intensity at frequency (f) in dBA/m
Vp(f) is the output voltage of the probe coil at frequency (f) in dBV
P(f) is the probe sensitivity at frequency (f) in dBV for a field intensity of 1 A/m
rms
NOTE - This equation is the same as Equation 3 in IEEE Std 1027.
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6. Measure the THD of the probe coil output signal at 1 kHz:
a) With the Axial Probe located at the Perpendicular Measurement Position, and
with the 1 kHz signal determined in step 1, perform an FFT Spectrum Analysis
with Hann Windowing over the frequency range of 100 Hz to 8500 Hz, averaged
over a period of 5 seconds.
b) Apply the Half-Band Integrator correction curve to the summable spectrum from
the above FFT measurement (see Error! Reference source not found.).
c) Convert the above integrated measurement to 1 kHz equivalent magnetic field
intensity units (dBA/m) by subtracting the HAC probe sensitivity at 1 kHz (output
level for 0 dBA/m) uniformly from the entire spectrum.
d) Calculate the THD.
7. Measure the Perpendicular Induced Voltage Frequency Response using the equation
in step 4 above from 300 Hz to 3350 Hz using 1/12 octave bands or ISO R40
frequencies using the same input level determined in step 1.
8. Measure the Perpendicular A-weighted Noise:
a) With the Axial Probe located at the Perpendicular Measurement Position, and with
no signal applied, perform an FFT Spectrum Analysis with Hann Windowing over
the frequency range of 100 Hz to 8500 Hz, averaged over a period of 5 seconds.
b) Apply the Half-Band Integrator correction curve to the summable spectrum from
the above FFT measurement (see Error! Reference source not found.).
c) Convert the above integrated measurement to 1 kHz equivalent magnetic field
intensity units (dBA/m) by subtracting the HAC probe sensitivity at 1 kHz (output
level for 0 dBA/m) uniformly from the entire spectrum.
d) Perform an A-weighted power summation over the frequency range of 100 Hz to
8500 Hz and record the measurement as the Perpendicular A-weighted Magnetic
Noise in dB(A/m).
9. Calculate the Perpendicular Signal-to-Noise Ratio (Perpendicular Field Intensity
minus Perpendicular A-weighted Magnetic Noise).
10. If any of the above results do not meet the requirements of clause Error! Reference
source not found., change the volume control setting, or move the probe to another
location within the measurement area specified in step 3, or both, and repeat steps 4
through 8 above until all of the requirements are met or until the maximum volume
control setting has been tested.
11. Repeat steps 2 through 9 above with the UUT handset and base separated such that
the UUT is in a Far Range Mode, if applicable. This may require physically locating
the handset near maximum range from the base or using an RF isolation chamber.
TR41.3.9-08-02-004-M
(@@@ repeat changes for transverse)
3.3.2 Method of Measurement for Telephones With Digital Interface
1. Configure the UUT and test equipment as shown in Error! Reference source not
found., with the handset within 2 meters of the base for the Near Range Mode.
2. Place the UUT off-hook and adjust its volume control to the first volume control
setting to be tested.
3. Apply a 1 kHz –10 dBV signal across the 10 ohm matching pad resistor (see Error!
Reference source not found.). Locate the Transverse Measurement Position with
the strongest magnetic field intensity (in response to the 1 kHz applied signal) by
scanning the handset earpiece with the Radial Probe. The Transverse Measurement
Position shall be restricted to an area in the measurement plane and (see Error!
Reference source not found.):

Between 10 mm beyond the top of the handset housing and 10 mm toward the
microphone end of the handset from the reference axis
 Within the width of the handset.
All of the following measurements shall be made at the same measurement position.
4. Measure the Transverse Field Intensity at 1 kHz.
a) Measure the probe coil electrical output in dBV.
b) Convert the probe voltage to magnetic field intensity units using the following
equation:
Hr(f) = Vp(f)-P(f)
where
Hr(f) is the receiver magnetic field intensity at frequency (f) in dBA/m
Vp(f) is the output voltage of the probe coil at frequency (f) in dBV
P(f) is the probe sensitivity at frequency (f) in dBV for a field intensity of 1 A/m
rms
NOTE - This equation is the same as Equation 3 in IEEE Std 1027.
TR41.3.9-08-02-004-M
5. Measure the THD of the probe coil output signal at 1 kHz:
a) With the Radial Probe located at the Transverse Measurement Position, and with
a 1 kHz -10 dBV signal applied across the 10 ohm matching pad resistor (see
Error! Reference source not found.), perform an FFT Spectrum Analysis with
Hann Windowing over the frequency range of 100 Hz to 8500 Hz, averaged over
a period of 5 seconds.
b) Apply the Half-Band Integrator correction curve to the summable spectrum from
the above FFT measurement (see Error! Reference source not found.).
c) Convert the above integrated measurement to 1 kHz equivalent magnetic field
intensity units (dBA/m) by subtracting the HAC probe sensitivity at 1 kHz (output
level for 0 dBA/m) uniformly from the entire spectrum.
d) Calculate the THD.
6. Measure the Transverse A-weighted Noise.
a) With the Radial Probe located at the Transverse Measurement Position, and with
no signal applied, perform an FFT Spectrum Analysis with Hann Windowing over
the frequency range of 100 Hz to 8500 Hz, averaged over a period of 5 seconds.
b) Apply the Half-Band Integrator correction curve to the summable spectrum from
the above FFT measurement (see Error! Reference source not found.).
c) Convert the above integrated measurement to 1 kHz equivalent magnetic field
intensity units (dBA/m) by subtracting the HAC probe sensitivity at 1 kHz (output
level for 0 dBA/m) uniformly from the entire spectrum.
d) Perform an A-weighted power summation over the frequency range of 100 Hz to
8500 Hz and record the measurement as the Transverse A-weighted Magnetic
Noise in dB(A/m).
7. Calculate the Transverse Signal-to-Noise Ratio (Transverse Field Intensity minus
Transverse A-weighted Magnetic Noise).
8. If any of the above results do not meet the requirements of clause Error! Reference
source not found., change the volume control setting, or move the probe to another
location within the measurement area specified in step 3, or both, and repeat steps 4
through 7 above until all of the requirements are met or until the maximum volume
control setting has been tested.
9. Repeat steps 2 through 8 above with the UUT handset and base separated such that
the UUT is in a Far Range Mode, if applicable. This may require physically locating
the handset near maximum range from the base or using an RF isolation chamber.