29

ACE9040

Gain and filter set-ups for user control bits: Receive

TACS

AMPS

User control bit(s)

External De-emphasis

Fixed

externally

RXSENSE: Receive audio gain

+ 8 dB

+ 8 dB

Fixed

RXSENSE: Receive audio gain adjustment

- 6 to + 6.4 dB

- 6 to + 6.4 dB

RXSEN[4:0]

range

RXBPF: RX bandpass filter

0 dB

0 dB

Fixed

RX Expander gain EXPGAIN: Internal

+ 12.3 dB

+ 12.3 dB

Fixed

RX Expander gain EXPGAIN: External

0 dB

0 dB

Fixed

Expander: Expansion about unaffected

Fixed

level (1000 mV, 0 dBV)

RXLEVEL, Receive volume control

- 12 dB

- 12 dB

RXV[2:0]

(+ 12 to - 9 dB)

(+ 12 to - 9 dB)

HFATTEN, RX handsfree attenuator

0 to - 49 dB

0 to - 49 dB

RHF[2:0]

EARSENSE

0 dB

0 dB

EARS[3:0]

(- 2.8 to + 3.2 dB)

(- 2.8 to + 3.2 dB)

Ear piece driver

6 dB

6 dB

Fixed

Nominal Receive Gain

- 6.7 dB

- 6.7 dB

Fixed

(Expander bypassed)

DATA and SAT Filters

TX data path filter cut-off

16 kHz

20 kHz

DATAF[1:0]

TX & RX bandpass SAT filter centre

6 kHz

6 kHz

Fixed

frequency

Notes:

1. Attenuation with an external de-emphasis network of series 180 k

Ω with 10 nF to GND at RXI input.

2. Above the unaffected (0 dB gain) level the expander provides gain and below this level it attenuates

.

Table 24 Receive, Data and SAT gain and filter set-ups for user control bits