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參數(shù)資料
| 型號： | T7504 |
| 廠商： | Lineage Power |
| 元件分類： | Codec |
| 英文描述： | Quad PCM Codecs with Filters(帶濾波器的四PCM編解碼器) |
| 中文描述： | 四的PCM編解碼器和過濾器（帶濾波器的四的PCM編解碼器） |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 334K |
| 代理商： | T7504 |
Lucent Technologies Inc.
7
Data Sheet
March 1999
T7504 and T5504 Quad PCM Codecs with Filters
Transmission Characteristics
(continued)
ac Transmission Characteristics
Unless otherwise noted, the analog input is a 0 dBm0, 1020 Hz sine wave; the input amplifier is set for unity gain.
The digital input is a PCM bit stream equivalent to that obtained by passing a 0 dBm0, 1020 Hz sine wave through
an ideal encoder. The output level is sin(x)/x-corrected.
Table 5. Absolute Gain
Table 6. Gain Tracking
Table 7. Distortion
Parameter
Symbol
EmW
Test Conditions
Min
–0.25
Typ
—
Max
0.25
Unit
dBm0
Encoder Milliwatt
Response (transmit gain toler-
ance)
Decoder Milliwatt
Response (receive gain toler-
ance)
Signal input of 0.775 Vrms,
μ
-law or
A-law
DmW
Measured relative to 0.775 Vrms
μ
-law
or A-law,
PCM input of 0 dBm0 1020 Hz
RL = 10 k
–0.25
—
0.25
dBm0
Parameter
Symbol
GT
X
Test Conditions
+3 dBm0 to –37 dBm0
–37 dBm0 to –50 dBm0
+3 dBm0 to –37 dBm0
–37 dBm0 to –50 dBm0
Min
–0.25
–0.50
–0.25
–0.50
Typ
—
—
—
—
Max
0.25
0.50
0.25
0.50
Unit
dB
dB
dB
dB
Transmit Gain Tracking Error
Sinusoidal Input
μ
-Law/A-Law
Receive Gain Tracking Error
Sinusoidal Input
μ
-Law/A-Law
GT
R
Parameter
Symbol
SD
X
Test Conditions
μ
-law 3 dBm0
≤
VF
X
I
≤
–30 dBm0
A-law 3 dBm0
≤
VF
X
I
≤
–30 dBm0
μ
-law –30 dBm0
≤
VF
X
I
≤
–40 dBm0
A-law –30 dBm0
≤
VF
X
I
≤
–40 dBm0
μ
-law –40 dBm0
≤
VFxI
≤
–45 dBm0
A-law –40 dBm0
≤
VFxI
≤
–45 dBm0
μ
-law 3 dBm0
≤
VF
R
O
≤
–30 dBm0
A-law 3 dBm0
≤
VF
R
O
≤
–30 dBm0
μ
-law –30 dBm0
≤
VF
R
O
≤
–40 dBm0
A-law –30 dBm0
≤
VF
R
O
≤
–40 dBm0
μ
-law –40 dBm0
≤
VF
R
O
≤
–45 dBm0
A-law –40 dBm0
≤
VF
R
O
≤
–45 dBm0
200 Hz—3400 Hz, 0 dBm0 input,
output any other single
frequency
≤
3400 Hz
200 Hz—3400 Hz, 0 dBm0 input,
output any other single
frequency
≤
3400 Hz
Transmit or receive, two frequencies
in the range (300 Hz—3400 Hz)
at –6 dBm0
Min
36
35
30
29
25
25
36
35
30
29
25
25
—
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
—
—
—
—
—
—
—
—
—
—
—
—
–38
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm0
Transmit Signal to Distortion
Receive Signal to Distortion
SD
R
Single Frequency Distortion,
Transmit
SFD
X
Single Frequency Distortion,
Receive
SFD
R
—
—
–40
dBm0
Intermodulation Distortion
IMD
—
—
–42
dBm0
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