TIA 470C Test Sequence for Telephone Testing

Introduction

This sequence (compatible with SoundCheck 7.0) measures handset phones to TIA-470.110-C. The test sequence implements all the electroacoustic tests required by this standard, outputting the results as a report or writing to a database.

Future releases of this sequence are planned to cover headset and speakerphone testing, and will be developed when the relevant subsections of TIA-470 are approved. It contains all the major clauses of TIA470C, and also includes calibration sequences and subsequences. The test sequences can be used as they are to test to the standard, or modified by the user for custom in-house tests based on the standard.

TIA 470-C Results

Overall results for receive, send and sidetone

 

TIA 470-C Test Results

Details for receive, send and sidetone frequency response

Required Equipment

Hardware
Head and Torso Simulator with handset positioner
Power amplifier (if needed to power artificial mouth in Head and Torso Simulator)
SoundConnect Microphone Power Supply
SCM microphone or equivalent
Acoustic calibrator
Legato Telephone interface or similar

Software

SoundCheck 7.0 Telephone Testing R&D Package Part Number 1105
or alternative package including:
2005 RTA
2013 Wave file equalization
2007 Loudness rating
2009 Statistics
2001 Harmonic distortion

Note: This sequence has only been verified to work with SoundCheck version 7. If you are using a different version, please check with your sales engineer before purchasing.

 

System Diagram

Test set up for speakerphone measurement to TIA 470-C

 

Full details including all clauses tested

 

Clause

Measurement

Sequence & Subsequence(s)

 

 

 

4.4

Send Performance

 

4.4.1

General (no tests)

 

4.4.2

Send Frequency Response (sine)

JB0401 HN Sine Recv Send & Sidetone

 

 

JB0401s HN Sine Recv VC Ref

 

 

JB0401s HN LL Sine Recv

 

 

JB0401s HN HL Sine Recv

 

 

JB0401s HN Sine Send

 

 

JB0401s HN Sine Side

 

 

JB0401 HN P50-2 Recv Send & Sidetone

 

Send Frequency Response (P50-2)

JB0401s HN P50-2 Recv VC Ref

 

 

JB0401s HN LL P50-2 Recv

 

 

JB0401s HN HL P50-2 Recv

 

 

JB0401s HN P50-2 Send

 

 

JB0401s HN P50-2 Side

 

 

 

4.4.3

Send Loudness Rating (SLR)

 

4.4.3.1

Basic Requirement (sine)

included in implementation of 4.4.2

 

Basic Requirement (P50-2)

included in implementation of 4.4.2

 

 

 

4.4.3.2

Parallel Set (sine)

JB0401 HN Sine Parallel Set

 

 

(JB0401s HN LL Sine Recv)

 

 

(JB0401s HN HL Sine Recv)

 

 

(JB0401s HN Sine Send)

 

Parallel Set (P50-2)

JB0401 HN P50-2 Parallel Set

 

 

(JB0401s HN LL Sine Recv)

 

 

(JB0401s HN HL Sine Recv)

 

 

(JB0401s HN Sine Send)

 

 

 

4.4.3.3

Conference Mode (sine)

JB0401 HN Sine Conference Mode

 

 

(JB0401s HN LL Sine Recv)

 

 

(JB0401s HN HL Sine Recv)

 

 

(JB0401s HN Sine Send)

 

 

 

 

Conference Mode (P50-2)

JB0401 HN P50-2 Conference Mode

 

 

(JB0401s HN LL Sine Recv)

 

 

(JB0401s HN HL Sine Recv)

 

 

(JB0401s HN Sine Send)
     

4.4.4

Send Linearity

JB0401 HN Send and Recv Linearity

 

 

JB0401s HN Sine Recv VC Ref
     

4.4.5

Send Distortion

 

4.4.5.1

Send ANTHD

JB0401 HN Send and Recv ANTHD

 

 

JB0401s HN Sine Recv VC Ref

 

 

JB0401ss HN Sine Recv VC 12dB

 

 

 

4.4.5.2

Send ANTHD with Parallel Set

JB0401 HN Send and Recv ANTHD Parallel Set

 

 

JB0401s HN Sine Recv VC Ref
     

4.4.6

Send Noise

JB0401 HN Send and Recv Noise

 

 

JB0401s HN Send Noise On-hook

 

 

JB0401s HN Sine Recv VC Ref

 

 

JB0401s HN Send Noise and SFI

 

 

JB0401s HN Recv Noise and SFI

 

 

 

4.4.7

Send Muting

JB0401 HN Send Muting

 

 

 

4.5

Receive Performance

 

4.5.1

General (no tests)

 

4.5.2

Receive Frequency Response

included in implementation of 4.4.2
     

4.5.3

Receive Loudness Rating (RLR)

 

4.5.3.1

Basic Requirement (sine)

included in implementation of 4.4.2

 

Basic Requirement (P50-2)

included in implementation of 4.4.2

 

 

 

4.5.3.2

Parallel Set

included in implementation of 4.4.3.2

 

 

 

4.5.3.3

Conference Mode

included in implementation of 4.4.3.3

 

 

 

4.5.4

Receive Linearity

included in implementation of 4.4.4

 

 

 

4.5.5

Receive Distortion

 

4.5.5.1

Receive ANTHD

included in implementation of 4.4.5.1

 

 

 

4.5.5.2

Receive ANTHD with Parallel Set

included in implementation of 4.4.5.2

 

 

 

4.5.6

Receive Noise

included in implementation of 4.4.6

 

 

 

4.5.7

Receiver Volume Controls (sine)

JB0401 HN Sine Recv VC Max

 

 

(JB0401s HN LL Sine Recv)

 

Receiver Volume Controls (P50-2)

JB0401 HN P50-2 Recv VC Max

 

 

(JB0401s HN LL P50-2 Recv)

4.5.8

Magnetic Field for Hearing Aid Coupling (no test)

 
     

4.6

Sidetone Performance

 

4.6.1

General (no tests)

 

4.6.2

Sidetone Masking Rating

included in implementation of 4.4.2

 

 

 

4.6.3

Sidetone Echo Delay

included in implementation of 4.4.2

 

 

 

4.7

Acoustic Stability

JB0401 HN Stability

 

 

 

other

Handset volume control reference

JB0401s HN Sine Recv VC Ref

 

 

JB0401s HN P50-2 Recv VC Ref

 

 

 

 

Standalone control of B&K 5906

Xtra - 5906 Control
     
 

Change corr-in HATS R & HATS L to match use of ear simulators

Xtra - DRP to ERP
to corr in HATS R & HATS L
 

 

Xtra - Flat 0dB
to corr in HATS R & HATS L
 

 

Xtra - IEEE 1652 FF to DRP 12th Oct
to corr in HATS R & HATS L
 

 

Xtra - IEEE 1652 FF to DRP R40
to corr in HATS R & HATS L

 

 

 

 

Calibration

Sequence & Subsequence(s)

 

 

HATS & 6mm Cal Mic

JB0401 Calibration - HATS & Cal Mic

HATS L Ear

JB0401s Cal HATS Ear - Left

HATS R Ear

JB0401s Cal HATS Ear - Right

6mm Cal Mic

JB0401s Cal 6mm Cal mic

HATS Mouth Sine

JB0401s Cal HATS Mouth Sine

HATS Mouth P50 2 sec

JB0401s Cal HATS Mouth P50 2 sec

Standard Mouth & Mics

JB0401 Calibration - Std Mouth & Mics

Free Field Mic

JB0401s Cal FF mic

12mm Cal Mic

JB0401s Cal 12mm Cal mic

Mouth Sine

JB0401s Cal Mouth Sine

Mouth P50 2 sec

JB0401s Cal Mouth P50 2 sec

Show current calibration values

JB0401 Calibration - Show Current

 

Note: Sequences in () run only if saved measurements are not recalled and new measurements are made.

Acronyms used in the sequence names:

  • HN = handset
  • HL = high leak (10N force on Type 3.3 ear)
  • LL = low leak (18N force on Type 3.3 ear)
  • HS = headset
  • HFT = handsfree telephone (speakerphone)
  • P50-2 = 2-second fragment of artificial male speech defined by ITU-T P.50

Please contact  Listen, Inc. for more information.