TCM4400 Datasheet, PDF (24/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

2.11.2 Frequency Response of the Voice Band Uplink Path
PARAMETER
TEST CONDITIONS
100 Hz
150 Hz
200 Hz
300 Hz
1000 Hz Reference point is 1000 Hz
Frequency response (gain relative ^{2000 Hz}
to reference gain at 1 kHz)
3000 Hz
3400 Hz
3600 Hz
3800 Hz
4000 Hz
> 4600 Hz
MIN TYP
– 37.4
– 25.9
– 16.5
– 2.0 – 1.46
–1.0
0
– 1.0 – 0.58
– 1.0 – 0.77
– 2.0 – 1
– 12.4
– 23.3
– 35
> – 52
MAX
– 20
– 15
– 10
1.0
1.0
1.0
1.0
1.0
–6
– 18
– 30
– 40
UNIT
dB
2.11.3 Psophometric SNR vs Signal Level of the Voice Band Uplink Path
PARAMETER
TEST CONDITIONS
MIN TYP
3 dBm0
35
0 dBm0
40
– 5 dBm0
42
– 10 dBm0
45
Signal to noise + distortion
– 20 dBm0
42
– 30 dBm0
40
– 40 dBm0
30
– 45 dBm0
25
Maximum idle channel
noise
300 Hz – 3 kHz
Crosstalk with the downlink path
Downlink path loaded with 33 Ω
MAX
– 72
– 66
UNIT
dB
dBm0
dB
2.11.4 Gain Characteristics of the Voice Band Uplink Path
PARAMETER
TEST CONDITIONS
Absolute gain error
at 0 dBm 0 and 1 kHz
at – 10 dBm 0 and 1 kHz
3 dBm0
0 dBm0
Gain tracking error over the range 3
dBm0 to – 45 dBm0 at 1 kHz with
reference –10 dBm0
– 5 dBm0
– 10 dBm0
– 20 dBm0
Reference level
– 30 dBm0
– 40 dBm0
– 45 dBm0
MIN
– 1.8
– 11.8
– 0.25
– 0.25
– 0.25
– 0.25
– 0.25
– 0.35
– 0.50
TYP MAX UNIT
0.2
dB
– 10 – 9.8
0.25
0.25
0.25
0
dB
0.25
0.25
0.35
0.50
2–10