Coustic XM6 Manuel d'utilisateur télécharger pdf (Page 19)

To be ANSI/TIA-470.130-C

5.3 TEST CIRCUITS 246

The following test circuits are referenced in this document: 247

5.3.1 Send Testing with Artificial Lines 248

Artificial line

No.26 AWG

non-loaded cable

Tip

Telephone set

speech network

DC Feed Circuit

900 Ω

termination

Ring

Meter

or level

recorder

Apply Mouth

Sound

Pressure

at MRP

SETP

249

250

Figure 1 – Test circuit for send measurements 251

252

5.3.2 Receive Testing with Artificial Lines 253

254

Tip

Ring

900 Ω

Generator

Artificial line No.26 AWG

non-loaded cable

DC Feed Circuit

Telephone set

speech network

Ear Sound

Pressure

at ERP

RETP

255

256

Figure 2 – Test circuit for receive measurements 257

258

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 58 59

ELECOMMUNICATIONS INDUSTRY 1
SSOCIATION 1
To be ANSI/TIA-470.130-C 6
2 SCOPE 1 11
3 REFERENCES 16 12
3.1 NORMATIVE REFERENCES 23 12
BBREVIATIONS AND ACRONYMS 56 14
4.2 DEFINITIONS 83 15
5 TECHNICAL REQUIREMENTS 162 17
5.2 GENERAL 181 17
5.3 TEST CIRCUITS 246 19
5.4 SEND PERFORMANCE 325 25
Floating Mask 26
0 6 17 to 1 27
2.7 8 19 to 3 27
4.6 10 21 to 5 27
-20 dB +/- 3.0 dB 28
+10 dB +/- 2.0 dB 28
-10 dB +/- 2.0 dB 28
300 5% n/a 29
500 5% 10% 29
800 5% n/a 29
1000 5% 10% 29
5.5 RECEIVE PERFORMANCE 506 32
Desired Low Desired High 33
Mandatory Low Mandatory High 33
0 –5 +3 to –10 0 to –10 34
2.7 –3 +5 to –8 +2 to –8 34
4.6 –1 +7 to –6 +4 to –6 34
-30 dB +/- 4.0 dB 35
300 5% 10% n/a 36
500 5% 10% 10% 36
800 5% 10% n/a 36
1000 5% 10% 10% 36
IDETONE PERFORMANCE 690 39
5.7 ACOUSTIC STABILITY 729 40
Psophometric C-Message 43
Receive Noise Weighting Curve 44
10 0 05(/ ) 45
DLCs 860 51
LRs (dB) 52
Hierarchy 930 53
100Hz 1K 10K 58

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Coustic XM6 Manuel d'utilisateur Page 19

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