TCM8000

CELLULAR TELEPHONE AUDIO PROCESSOR

SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993

POST OFFICE BOX 655303

11

RXIN to RXO, RXTRIM, RXIN = 100 mVrms at 1 kHz (see Table 1)

PARAMETER

MIN

MAX

UNIT

Gain, RXTRIM = <1000>

–7

–5

dB

Step size

0.4

0.6

dB

Positive range

3

4

dB

Negative range

– 4.5

– 3.5

dB

RXIN to HFO/HSO frequency response, RXIN = 60 mVrms, RXTRIM = <1000>, VC = <1000>, expander

bypassed (see Figures 9 and 10 and Table 1)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Gain

f = 1 kHz

–7

–5

dB

f = 100 Hz

–30

f = 240 Hz

13.4

f = 300 Hz

7.9

11.5

f = 500 Hz

5

7

Relative gain

f = 2 kHz

–7

–5

dB

f = 3 kHz

–12

– 8.5

f = 3.4 kHz

–17

– 9.6

f = 4 kHz

–40

f = 10 kHz

–40

CTI to HFO/HSO, volume control, CTI = 100 mVrms at 1 kHz (see Table 1)

PARAMETER

MIN

MAX

UNIT

Gain, VC = <1000>

0

2

dB

Step size

1.8

2.2

dB

Positive range

13.5

14.5

dB

Negative range

– 16.5

– 15.5

dB

ST/TDI to HFO/HSO gain, ST/TDI = 100 mVrms at 1 kHz, VC = <1000> (see Table 1)

PARAMETER

MIN

MAX

UNIT

Gain ST to HSO

–7

–5

dB

Gain to TDI to HSO/HFO

±1

dB

expander gain characteristics, RXIN to HSO/HFO, f = 1 kHz, RXTRIM = <1000>, VC = <1000> (see Figure 2)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Gain (reference)

RXIN = 200 mVrms

±1

dB

RXIN = 200 mV + 3 dB

2

4

Expanded relative gain

RXIN = 200 mV – 12.5 dB

– 13.5

– 11.5

dB

RXIN = 200 mV – 25 dB

–23

–21

RX limiter, peak-to-peak output at HSO vs RXLIM, RXIN = 500 mVrms at 1 kHz, RXTRIM = <1000>, VC = <1000>,

expander enabled

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

RXLIM = 750 mV

1.6

Peak-to-peak output

RXLIM = 850 mV

1.8

VPP

RXLIM = 950 mV

2