STLC3080 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STLC3080

SUBSCRIBER LINE INTERFACE CIRCUIT

STMicroelectronics 

STLC3080

APPENDIX C

STLC3080 Test Circuits referring to the applica-

tion diagram shown in figure 4 and using as exter-

nal components the typ. values specified in the

”External Components”, find below the proper

configuration for each measurement.

Figure C1. Receive Gain.

Figure C2. THL Trans Hybrid Loss.

TIP

TX

300

STLC 3080

Vl

test circuit

Rp

TIP

TX

300

STLC 3080

Vtx

VL

test circuit

300

300

RING

RX

Vrx

RING

RX

Rp

Vrx

G42 = 20log (Vl / Vrx )

THL = 20log (Vrx /Vtx )

Figure C3. T/L Transversal to Longitudinal

Conversion

Figure C4. Transmit Gain.

Rp

TIP

TX

300

STLC 3080

Vl

test circuit

Vtl

300

RING

RX

Vrx

T/L = 20log (Vl / Vtl )

6 00

TIP

TX

STLC 3080

Vtx

E

test circuit

RING

RX

G24 = 20log (2Vtx / E )

Figure C5. L/T Longitudinal to transversal

Conversion.

300

10uF

E

300

Vac

TIP

TX

STLC 3080

test circuit

RING

RX

L/T = 20log ( E / Vac )

18/23

Figure C6. 2W Return Loss.

1000

E

1000

600

Vs

TIP

TX

STLC 3080

test circuit

RING

RX

2WRL = 20log ( E / 2Vs )

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