RECEIVE FILTER SELECTION AND GAIN PROGRAMMING REGISTER (RPRF REGISTER)

Address

Data

Reception Gain

(dB) (note 1)

Comments

D7

D6

D5

D4

D3

D2

D1

D0

P

101

X

X

00

0

XX

0

1

+ 6 *

XX

1

0

+ 12

X

X

1

1

0

Rx Channel Band = Tx Channel B and Tx to

Rx Loopback – 33dBm

≤ Rx Level ≤ 40dBm

X

0

X

X

X

Receive Filter Selected

X

1

X

X

X

Receive Filter Desabled

1

X

X

X

X

Receive F ilter Disconnected from RDI

Output and from Demodulator. Offset

Disabled.

* Power-up configuration.

Note 1 :

Depending on the line length, the received signal can be amplified. Programmable reception gain allows a level close to +3dBm

at the filter input to take benefit of the maximum filter dynamic range (S/N ratio). The following requirement must be met :

max. line level + prog. gain

≤+3dBm.

TRANSMISSION FILTER PROGRAMMING REGISTER (RPTF REGISTER)

Address

Data

ATO Transmission

D7

D6

D5

D4

D3

D2

D1

D0

P

1

0

0

0

0

0

0

MODEM or DTMF Signal*

0

0

0

1

ATxI via Smoothing Filter and Attenuator

0

0

1

0

ATxI via Low-pass Filter and Attenuator

0

0

1

1

ATxI via Band-pass Filter and Attenuator

0

1

0

0

In DTMF Mode, Transmision of High Tone Frequency

1

0

0

0

In DTMF Mode, Transmission of Low Tone Frequency

* Power-up configuration.

HYSTERESIS AND SIGNAL DETECTION LEVEL PROGRAMMING REGISTER (RHDL REGISTER)

Address

Data

N2 (dBm) (note 1)

See Figu re 4

N1/N2 (dB)

D7

D6

D5

D4

D3

D2

D1

D0

P

1

10

X

000

– 43 *

X

X

001

– 41

X

X

010

– 39

X

X

011

– 37

X

X

100

– 35

X

X

101

– 33

X

X

110

– 31

X

X

111

– 29

X

0X

X

X

X

3 *

1

X

X

X

X

3.5

* Power-up configuration.

Note 1 : Detection low level measured at the demodulator input. The line signal detection level is obtained by reducing the gain ate the filter.

TS7514

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