TCM8000

CELLULAR TELEPHONE AUDIO PROCESSOR

SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993

POST OFFICE BOX 655303

9

M1/M2 to TXO frequency response, NMT mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>,

MICTRIM = <1000>, compressor bypassed (see Figures 3 and 4 and Table 1)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Gain

f = 1 kHz

11.5

13.5

dB

f = 100 Hz

–19

f = 300 Hz

– 13.1

– 9.5

f = 500 Hz

–7

–5

f = 2 kHz

5

7

Relative gain

f = 3 kHz

7.7

10.5

dB

f = 3.4 kHz

6.6

11.6

f = 3.94 kHz

–40

f = 4.06 kHz

–40

f = 10 kHz

– 16.5

M1/M2 to TXO frequency response, AMPS/TACS mode, TXLIM = 2.5 V, input = 20 mVrms, TXTRIM = <1000>,

MICTRIM = <1000>, compressor bypassed (see Figures 5 and 6 and Table 1)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Gain

f = 1 kHz

11.5

13.5

dB

f = 100 Hz

–19

f = 300 Hz

– 13.1

– 9.5

f = 500 Hz

–7

–5

f = 2 kHz

5

7

Relative gain

f = 2.75 kHz

6.8

9.8

dB

Relative gain

f = 3 kHz

5.5

10.5

dB

f = 3.1 kHz

10.8

f = 5.9 kHz

–25

f = 6.1 kHz

–25

f = 10 kHz

–19

TXSUM to TXO gain adjust, input = 100 mVrms at 1 kHz (see Table 1)

PARAMETER

MIN

MAX

UNIT

Gain, TXTRIM = <1000>

±1

dB

Step size

0.4

0.6

dB

Positive range

3

4

dB

Negative range

– 4.5

– 3.5

dB

compressor gain characteristics, M1/M2 to TXO, f = 1 kHz, MICTRIM = <1000> (see Figure 2 for external

components)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Gain (reference)

M1/M2 = 100 mVrms

11

13

dB

M1/M2 = 100 mV+ 3 dB

1

2

Relative gain

M1/M2 = 100 mV – 25 dB

–13

–12

dB

M1/M2 = 100 mV – 50 dB

– 25.5

–24.5

TX limiter, peak-to-peak output at TXO relative to nominal output, M1/M2 = 1 Vrms at 1 kHz,

MICTRIM = <1000>, compressor enabled, nominal output measured at TXO for 100 mVrms input at M1/M2

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

TXLIM = 500 mV

1.25

TXLIM = 550 mV

1.35

Peak-to-peak output

TXLIM = 600 mV

1.45

V/V

TXLIM = 650 mV

1.55

TXLIM = 800 mV

1.85